Add deploy step to CI workflow to auto-restart container on tag push

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.claude/commands/integrate-issue.md

@@ -0,0 +1,143 @@
+---
+description: Fetch a Gitea issue, identify the affected feature spec(s), and integrate the issue's requirements into the spec. For new features, hands off to /speckit.specify.
+---
+
+## User Input
+
+```text
+$ARGUMENTS
+```
+
+You **MUST** provide an issue number as the argument (e.g. `/integrate-issue 6`). If `$ARGUMENTS` is empty or not a valid number, ask the user for the issue number.
+
+## Prerequisites
+
+1. Verify the `GITEA_TOKEN_ISSUES` environment variable is set:
+
+```bash
+test -n "$GITEA_TOKEN_ISSUES" && echo "TOKEN_OK" || echo "TOKEN_MISSING"
+```
+
+If missing, tell the user to set it:
+```
+export GITEA_TOKEN_ISSUES="your-gitea-personal-access-token"
+```
+Then abort.
+
+2. Parse the git remote to extract the Gitea API base URL, owner, and repo:
+
+```bash
+git config --get remote.origin.url
+```
+
+Expected format: `ssh://git@<host>:<port>/<owner>/<repo>.git` or `https://<host>/<owner>/<repo>.git`
+
+Extract:
+- `GITEA_HOST` — the hostname
+- `OWNER` — the repo owner/org
+- `REPO` — the repo name (strip `.git` suffix)
+- `API_BASE` — `https://<GITEA_HOST>/api/v1`
+
+## Execution
+
+### Step 1 — Fetch the issue
+
+```bash
+curl -sf -H "Authorization: token $GITEA_TOKEN_ISSUES" "$API_BASE/repos/$OWNER/$REPO/issues/<NUMBER>"
+```
+
+Extract from the JSON response:
+- `title` — the issue title
+- `body` — the issue body (markdown)
+- `labels` — array of label names (if any)
+
+If the API call fails or returns no issue, abort with a clear error.
+
+### Step 2 — Fetch issue comments (if any)
+
+```bash
+curl -sf -H "Authorization: token $GITEA_TOKEN_ISSUES" "$API_BASE/repos/$OWNER/$REPO/issues/<NUMBER>/comments"
+```
+
+If comments exist, include them as additional context (they may contain clarifications or requirements discussed after the issue was created).
+
+### Step 3 — Route: new feature or existing feature?
+
+List the existing feature specs by reading the `specs/` directory:
+
+```bash
+ls -d specs/*/
+```
+
+Present the issue summary and existing specs to the user. Ask:
+
+**"Does this issue belong to an existing feature, or is it a new feature?"**
+
+Present options:
+- Each existing spec as a numbered option (show spec name and one-line description from CLAUDE.md or the spec's overview)
+- A "New feature" option
+
+If the user selects **New feature**, compose the feature description from the issue content (title + body + comments) and hand off to `/speckit.specify`. Stop here.
+
+If the user selects an **existing spec**, continue to Step 4.
+
+### Step 4 — Read the affected spec
+
+Load the selected spec file. Identify the sections that the issue's requirements affect:
+- Which user stories need updating?
+- Which requirements (FR-NNN) need adding or modifying?
+- Which acceptance scenarios change?
+- Are new edge cases introduced?
+
+Present your analysis to the user:
+- **Stories affected**: list the story IDs/titles that need changes
+- **New stories needed**: if the issue introduces behavior not covered by any existing story
+- **Requirements to add/modify**: list specific FR numbers or new ones needed
+
+Ask the user to confirm or adjust the scope.
+
+### Step 5 — Draft spec changes
+
+For each affected section, draft the specific changes:
+
+- **Modified stories**: show the before/after for acceptance scenarios
+- **New stories**: write them in the spec's format (matching the existing story naming convention — e.g., `**Story HP-7**` for combatant-state, `**Story A4**` for combatant-management)
+- **New/modified requirements**: write them with the next available FR number
+- **New edge cases**: add to the relevant edge cases section
+
+For per-topic specs (003-combatant-state, 004-bestiary), place changes in the correct topic section.
+
+### Step 6 — Preview and confirm
+
+Show the user a complete preview of all changes:
+- Which file(s) will be modified
+- The exact additions/modifications (as diffs or before/after blocks)
+
+Ask for confirmation before writing.
+
+### Step 7 — Write changes
+
+On confirmation:
+- Write the updated spec file(s)
+- Report what was changed (sections touched, stories added/modified, requirements added)
+
+### Step 8 — Suggest next steps
+
+Report completion and suggest next steps based on scope:
+
+- **Straightforward change** (1-2 stories, clear acceptance scenarios): "Implement the changes and commit"
+- **Larger change** (multiple stories, cross-cutting concerns): "Use `rpi-research` to investigate the affected code, then `rpi-plan` to create a phased implementation plan, then `rpi-implement` to execute it"
+- **Complex or ambiguous change**: "Run `/speckit.clarify` to resolve remaining ambiguities before implementing"
+- Only if the spec adds substantive new criteria not already captured in the issue: "Run `/sync-issue <number>` to update the Gitea issue with the new acceptance criteria". Skip this if the spec merely reformulates what the issue already says into Given/When/Then format.
+
+## Behavior Rules
+
+- Never modify the issue on Gitea — this is a read-only operation on the issue side.
+- Always preview before writing spec changes — never write without user confirmation.
+- Include comment authors in the context so requirements can be attributed.
+- If the issue body is empty, warn the user but still proceed with just the title.
+- Strip HTML tags from the body/comments if present (Gitea sometimes includes rendered HTML).
+- Use `curl` for all API calls — do not rely on `gh` CLI.
+- Match the existing spec's naming conventions for stories, requirements, and structure.
+- When adding to per-topic specs (003, 004), place content in the correct topic section — do not create new top-level sections unless the change introduces an entirely new topic area.
+- Increment FR/SC numbers from the highest existing number in the spec.

.claude/commands/speckit.plan.md

@@ -75,14 +75,7 @@ You **MUST** consider the user input before proceeding (if not empty).
    - Examples: public APIs for libraries, command schemas for CLI tools, endpoints for web services, grammars for parsers, UI contracts for applications
    - Skip if project is purely internal (build scripts, one-off tools, etc.)
 
-3. **Agent context update**:
-   - Run `.specify/scripts/bash/update-agent-context.sh claude`
-   - These scripts detect which AI agent is in use
-   - Update the appropriate agent-specific context file
-   - Add only new technology from current plan
-   - Preserve manual additions between markers
-
-**Output**: data-model.md, /contracts/*, quickstart.md, agent-specific file
+**Output**: data-model.md, /contracts/*, quickstart.md
 
 ## Key rules
 

.claude/commands/sync-issue.md

@@ -0,0 +1,162 @@
+---
+description: Update a Gitea issue with business-level acceptance criteria extracted from the feature spec's user stories.
+---
+
+## User Input
+
+```text
+$ARGUMENTS
+```
+
+You **MUST** provide an issue number as the argument (e.g. `/sync-issue 42`). If `$ARGUMENTS` is empty or not a valid number, ask the user for the issue number.
+
+## Prerequisites
+
+1. Verify the `GITEA_TOKEN_ISSUES` environment variable is set:
+
+```bash
+test -n "$GITEA_TOKEN_ISSUES" && echo "TOKEN_OK" || echo "TOKEN_MISSING"
+```
+
+If missing, tell the user to set it:
+```
+export GITEA_TOKEN_ISSUES="your-gitea-personal-access-token"
+```
+Then abort.
+
+2. Parse the git remote to extract the Gitea API base URL, owner, and repo:
+
+```bash
+git config --get remote.origin.url
+```
+
+Expected format: `ssh://git@<host>:<port>/<owner>/<repo>.git` or `https://<host>/<owner>/<repo>.git`
+
+Extract:
+- `GITEA_HOST` — the hostname
+- `OWNER` — the repo owner/org
+- `REPO` — the repo name (strip `.git` suffix)
+- `API_BASE` — `https://<GITEA_HOST>/api/v1`
+
+3. Locate the spec file. List the available feature specs:
+
+```bash
+ls specs/*/spec.md
+```
+
+Present the specs to the user and ask which one contains the acceptance criteria for this issue. If only one spec exists, use it automatically.
+
+## Execution
+
+### Step 1 — Read the spec
+
+Load the spec file at `FEATURE_SPEC`. Extract user stories and acceptance scenarios using these patterns:
+
+**Flat specs** (001-combatant-management, 002-turn-tracking):
+- Look for the `## User Scenarios & Testing` section
+- Each `### ... Story ...` or `**Story ...** ` block
+- The **Acceptance Scenarios** numbered list within each story (Given/When/Then format)
+- The **Edge Cases** section(s)
+
+**Per-topic specs** (003-combatant-state, 004-bestiary):
+- Stories are nested inside topic sections (e.g., `## Hit Points` > `### User Stories` > `**Story HP-1 — ...**`)
+- Scan ALL `##` sections for `**Story ...` or `**US-...` patterns
+- Extract acceptance scenarios from each story regardless of nesting depth
+- Collect edge cases from each topic section's `### Edge Cases` subsection
+
+### Step 2 — Condense into business-level acceptance criteria
+
+For each user story, extract the acceptance scenarios and rewrite them as concise, business-level checkbox items. Group by user story title.
+
+**Transformation rules:**
+- Strip Given/When/Then syntax — write as plain outcomes
+- Remove implementation details (API names, database references, component names, file paths, config values, tool names)
+- Focus on what the user **can do** or **can see**
+- Keep each item to one line
+- Preserve the grouping by user story for readability
+
+**Example transformation:**
+
+Input (from spec):
+```
+**Given** no sources are cached, **When** the user clicks the import button in the top bar,
+**Then** the stat block side panel opens showing a descriptive explanation, an editable
+pre-filled base URL, and a "Load All" button.
+```
+
+Output (for issue):
+```
+- [ ] Clicking the import button opens a panel with a description, editable URL, and "Load All" button
+```
+
+Also include edge cases as a separate group if they describe user-facing behavior.
+
+### Step 3 — Fetch the existing issue
+
+```bash
+curl -sf -H "Authorization: token $GITEA_TOKEN_ISSUES" "$API_BASE/repos/$OWNER/$REPO/issues/<NUMBER>"
+```
+
+Extract the current `body` from the response.
+
+### Step 4 — Update the issue body
+
+Merge the acceptance criteria into the existing issue body:
+
+- If the body already has an `## Acceptance Criteria` section, **replace** its contents (everything between `## Acceptance Criteria` and the next `##` heading or end of body).
+- If the body does not have an `## Acceptance Criteria` section, insert it after the `## Summary` section (or at the end if no Summary exists).
+
+Preserve all other sections of the issue body unchanged.
+
+The acceptance criteria section should look like:
+
+```markdown
+## Acceptance Criteria
+
+### <User Story 1 Title>
+- [ ] <criterion from acceptance scenario>
+- [ ] <criterion from acceptance scenario>
+
+### <User Story 2 Title>
+- [ ] <criterion from acceptance scenario>
+
+### Edge Cases
+- [ ] <edge case behavior>
+```
+
+### Step 5 — Preview and confirm
+
+Show the user:
+- The full updated issue body
+- A diff summary of what changed (sections added/replaced)
+
+Ask for confirmation before updating.
+
+### Step 6 — Push the update
+
+On confirmation:
+
+```bash
+curl -sf -X PATCH \
+  -H "Authorization: token $GITEA_TOKEN_ISSUES" \
+  -H "Content-Type: application/json" \
+  "$API_BASE/repos/$OWNER/$REPO/issues/<NUMBER>" \
+  -d @- <<'PAYLOAD'
+{
+  "body": "<updated body>"
+}
+PAYLOAD
+```
+
+Report success with the issue URL.
+
+## Behavior Rules
+
+- Never modify the issue title, labels, milestone, or assignees — only the body.
+- Always preview before updating — never push without user confirmation.
+- If the spec has no user stories or acceptance scenarios, abort with a clear message suggesting the user run `/speckit.specify` first.
+- Acceptance criteria must be business-level. If you find yourself writing implementation details, rewrite at a higher level of abstraction.
+- Do NOT sync when the issue's existing acceptance criteria already capture the same requirements as the spec. The spec's Given/When/Then format is not needed in the issue — if the only difference is formatting, skip the sync and tell the user the criteria already align.
+- Use `curl` for all API calls — do not rely on `gh` CLI.
+- Always use HEREDOC for the JSON payload to handle special characters in the body.
+- Escape double quotes and newlines properly in the JSON body.

.claude/commands/write-issue.md

@@ -0,0 +1,163 @@
+---
+description: Interactive interview to create a well-structured Gitea issue with business-level acceptance criteria.
+---
+
+## User Input
+
+```text
+$ARGUMENTS
+```
+
+You **MUST** consider the user input before proceeding (if not empty).
+
+## Prerequisites
+
+1. Verify the `GITEA_TOKEN_ISSUES` environment variable is set:
+
+```bash
+test -n "$GITEA_TOKEN_ISSUES" && echo "TOKEN_OK" || echo "TOKEN_MISSING"
+```
+
+If missing, tell the user to set it:
+```
+export GITEA_TOKEN_ISSUES="your-gitea-personal-access-token"
+```
+Then abort.
+
+2. Parse the git remote to extract the Gitea base URL, owner, and repo:
+
+```bash
+git config --get remote.origin.url
+```
+
+Expected format: `ssh://git@<host>:<port>/<owner>/<repo>.git` or `https://<host>/<owner>/<repo>.git`
+
+Extract:
+- `GITEA_HOST` — the hostname (e.g. `git.bahamut.nitrix.one`)
+- `GITEA_PORT` — the port if present in SSH URL (for API, always use HTTPS on default port)
+- `OWNER` — the repo owner/org
+- `REPO` — the repo name (strip `.git` suffix)
+- `API_BASE` — `https://<GITEA_HOST>/api/v1`
+
+Verify the remote is reachable:
+```bash
+curl -sf -H "Authorization: token $GITEA_TOKEN_ISSUES" "$API_BASE/repos/$OWNER/$REPO" | head -c 200
+```
+
+If this fails, abort with an error explaining the API is unreachable.
+
+## Interview Flow
+
+### Step 1 — What's the feature?
+
+If `$ARGUMENTS` is not empty, use it as the initial feature description and skip asking.
+
+Otherwise, ask the user: **"What feature or change do you want to build?"**
+
+Accept a free-form description (1-3 sentences is fine).
+
+### Step 2 — Contextual business questions
+
+Analyze the feature description and identify what's ambiguous or underspecified **for this specific feature**. Generate 1-3 targeted questions that would materially improve the issue.
+
+Rules:
+- Questions MUST be derived from the specific feature description, not from a generic checklist.
+- Only ask questions whose answers change the scope, behavior, or acceptance criteria.
+- If the feature is straightforward and well-described, skip this step entirely.
+- Present one question at a time using the AskUserQuestion tool.
+- For each question, provide 2-4 concrete options plus the ability to give a custom answer.
+- After each answer, decide if you need another question or have enough clarity.
+
+Examples of good contextual questions:
+- For a "color overhaul" feature: "Are you targeting specific components or a global palette change?"
+- For a "bulk import" feature: "Should the user see progress during import or just a final result?"
+- For an "initiative tiebreaker" feature: "Should ties be broken by DEX score, manual choice, or random roll?"
+
+Examples of bad questions (never ask these):
+- Generic: "Who is the target user?"
+- Obvious: "Should errors be handled?"
+- Implementation: "What database should we use?"
+
+### Step 3 — Acceptance criteria
+
+Based on the description and clarifications, draft 3-8 business-level acceptance criteria. These should describe **what the user can do or see**, not how the system implements it.
+
+Present the draft to the user and ask if they want to add, remove, or change any.
+
+Good: "User can load all sources with a single click"
+Bad: "System fires concurrent fetch requests to IndexedDB"
+
+### Step 4 — Labels and milestone (optional)
+
+Fetch available labels and milestones from the Gitea API:
+
+```bash
+curl -sf -H "Authorization: token $GITEA_TOKEN_ISSUES" "$API_BASE/repos/$OWNER/$REPO/labels"
+curl -sf -H "Authorization: token $GITEA_TOKEN_ISSUES" "$API_BASE/repos/$OWNER/$REPO/milestones"
+```
+
+If labels/milestones exist, present them to the user and ask which (if any) to apply. If none exist or the API returns empty, skip this step.
+
+### Step 5 — Branch linking
+
+Check if we're on a feature branch:
+
+```bash
+git branch --show-current
+```
+
+If the current branch is not `main` (and looks like a feature branch, e.g. `NNN-feature-name`), offer to include it in the issue body as a linked branch.
+
+### Step 6 — Preview and create
+
+Compose the issue body using this template:
+
+```markdown
+## Summary
+
+<2-3 sentence description synthesized from the interview>
+
+## Acceptance Criteria
+
+- [ ] <criterion 1>
+- [ ] <criterion 2>
+- [ ] <criterion 3>
+...
+
+## Branch
+
+`<branch-name>` *(if linked in step 5)*
+```
+
+Show the full preview (title + body) to the user and ask for confirmation.
+
+On confirmation, create the issue:
+
+```bash
+curl -sf -X POST \
+  -H "Authorization: token $GITEA_TOKEN_ISSUES" \
+  -H "Content-Type: application/json" \
+  "$API_BASE/repos/$OWNER/$REPO/issues" \
+  -d @- <<'PAYLOAD'
+{
+  "title": "<issue title>",
+  "body": "<issue body>",
+  "labels": [<label IDs if selected>],
+  "milestone": <milestone ID if selected or null>
+}
+PAYLOAD
+```
+
+Parse the response and report:
+- Issue number and URL (`https://<GITEA_HOST>/<OWNER>/<REPO>/issues/<number>`)
+- Suggest next step: `/integrate-issue <number>` to integrate into a feature spec
+
+## Behavior Rules
+
+- Keep the title short — under 70 characters.
+- Acceptance criteria must be business-level, not implementation details.
+- Never create an issue without user confirmation of the preview.
+- If any API call fails, show the error and suggest the user check their token permissions.
+- Use `curl` for all API calls — do not rely on `gh` CLI.
+- Always use HEREDOC for the JSON payload to handle special characters in the body.
+- Escape double quotes and newlines properly in the JSON body.

.claude/skills/rpi-implement/SKILL.md

@@ -0,0 +1,82 @@
+---
+name: rpi-implement
+description: Execute approved implementation plans phase by phase with automated and manual verification. Use when the user explicitly says "implement the plan", "execute the plan", or "start implementing" and has a plan file ready. Do not use for ad-hoc coding tasks without a plan.
+---
+
+# Implement Plan
+
+You are tasked with implementing an approved technical plan. These plans contain phases with specific changes and success criteria.
+
+## Getting Started
+
+If the user provided a plan path, proceed directly. If no plan path was provided, check `docs/agents/plans/` for recent plans. If none found, ask the user for a path.
+
+When you have a plan:
+- Read the plan completely and check for any existing checkmarks (`- [x]`)
+- Read all files mentioned in the plan
+- **Read files fully** - never use limit/offset parameters, you need complete context
+- Think deeply about how the pieces fit together
+- If you have a todo list, use it to track your progress
+- Start implementing if you understand what needs to be done
+
+## Implementation Philosophy
+
+Plans are carefully designed, but reality can be messy. Your job is to:
+- Follow the plan's intent while adapting to what you find
+- Implement each phase fully before moving to the next
+- Verify your work makes sense in the broader codebase context
+- Keep plan checkboxes current: `[-]` before starting an item, `[x]` right after it passes verification. Never batch updates.
+
+When things don't match the plan exactly, think about why and communicate clearly. The plan is your guide, but your judgment matters too.
+
+If you encounter a mismatch:
+- STOP and think deeply about why the plan can't be followed
+- Present the issue clearly:
+  ```
+  Issue in Phase [N]:
+  Expected: [what the plan says]
+  Found: [actual situation]
+  Why this matters: [explanation]
+
+  How should I proceed?
+  ```
+
+## Verification Approach
+
+After implementing a phase:
+- Run the success criteria checks listed in the plan (test commands, linters, type checkers, etc.)
+- Fix any issues before proceeding
+- **Check if manual verification is needed**: Look at the plan's success criteria for the current phase.
+  - If the phase has **manual verification steps**, pause and inform the human:
+    ```
+    Phase [N] Complete - Ready for Manual Verification
+
+    Automated verification passed:
+    - [List automated checks that passed]
+
+    Please perform the manual verification steps listed in the plan:
+    - [List manual verification items from the plan]
+
+    Let me know when manual testing is complete so I can proceed to Phase [N+1].
+    ```
+  - If the phase has **only automated verification** (no manual steps), continue directly to the next phase without pausing. Just note in passing that the phase is complete and automated checks passed.
+
+Do not check off items in the manual testing steps until confirmed by the user.
+
+## If You Get Stuck
+
+When something isn't working as expected:
+- First, make sure you've read and understood all the relevant code
+- Consider if the codebase has evolved since the plan was written
+- Present the mismatch clearly and ask for guidance
+
+Use sub-agents sparingly - mainly for targeted debugging or exploring unfamiliar territory.
+
+## Resuming Work
+
+If the plan has existing checkmarks:
+- Trust that completed work is done
+- Pick up from the first unchecked item
+- Verify previous work only if something seems off
+
+Remember: You're implementing a solution, not just checking boxes. Keep the end goal in mind and maintain forward momentum.

.claude/skills/rpi-plan/SKILL.md

@@ -0,0 +1,349 @@
+---
+name: rpi-plan
+description: Create detailed, phased implementation plans through interactive research and iteration. Use when the user explicitly asks to "create a plan", "plan the implementation", or "design an approach" for a feature, refactor, or bug fix. Do not use for quick questions or simple tasks.
+---
+
+# Implementation Plan
+
+You are tasked with creating detailed implementation plans through an interactive, iterative process. You should be skeptical, thorough, and work collaboratively with the user to produce high-quality technical specifications.
+
+## Initial Setup
+
+If the user already provided a task description, file path, or topic alongside this command, proceed directly to step 1 below. Only if no context was given, respond with:
+```
+I'll help you create a detailed implementation plan. Let me start by understanding what we're building.
+
+Please provide:
+1. A description of what you want to build or change
+2. Any relevant context, constraints, or specific requirements
+3. Pointers to related files or previous research
+
+I'll analyze this information and work with you to create a comprehensive plan.
+```
+Then wait for the user's input.
+
+## Process Steps
+
+### Step 1: Context Gathering & Initial Analysis
+
+1. **Read all mentioned files immediately and FULLY**:
+   - Any files the user referenced (docs, research, code)
+   - **IMPORTANT**: Use the Read tool WITHOUT limit/offset parameters to read entire files
+   - **CRITICAL**: DO NOT spawn sub-tasks before reading these files yourself in the main context
+   - **NEVER** read files partially - if a file is mentioned, read it completely
+
+2. **Determine if research already exists**:
+   - If the user provided a research document (e.g. from `docs/agents/research/`), **trust it as the source of truth**. Do NOT re-research topics that the document already covers. Use its findings, file references, and architecture analysis directly as the basis for planning.
+   - **NEVER repeat or re-do research that has already been provided.** The plan phase is about turning existing research into actionable implementation steps, not about gathering information that's already available.
+   - If NO research document was provided, proceed with targeted research as described below.
+
+3. **Read the most relevant files directly into your main context**:
+   - Based on the research document and/or user input, identify the most relevant source files
+   - **Read these files yourself using the Read tool** — do NOT delegate this to sub-agents. You need these files in your own context to write an accurate plan.
+   - Focus on files that will be modified or that define interfaces/patterns you need to follow
+
+4. **Only spawn sub-agents for genuinely missing information**:
+   - Do NOT spawn sub-agents to re-discover what the research document already covers
+   - Only use sub-agents if there are specific gaps: e.g. the research doesn't cover test conventions, a specific API surface, or a file that was added after the research was written
+   - Each sub-agent should have a narrow, specific question to answer — not broad exploration
+
+5. **Analyze and verify understanding**:
+   - Cross-reference the requirements with actual code (and research document if provided)
+   - Identify any discrepancies or misunderstandings
+   - Note assumptions that need verification
+   - Determine true scope based on codebase reality
+
+6. **Present informed understanding and focused questions**:
+   ```
+   Based on the task and my research of the codebase, I understand we need to [accurate summary].
+
+   I've found that:
+   - [Current implementation detail with file:line reference]
+   - [Relevant pattern or constraint discovered]
+   - [Potential complexity or edge case identified]
+
+   Questions that my research couldn't answer:
+   - [Specific technical question that requires human judgment]
+   - [Business logic clarification]
+   - [Design preference that affects implementation]
+   ```
+
+   Only ask questions that you genuinely cannot answer through code investigation.
+
+### Step 2: Targeted Research & Discovery
+
+After getting initial clarifications:
+
+1. **If the user corrects any misunderstanding**:
+   - DO NOT just accept the correction
+   - Read the specific files/directories they mention directly into your context
+   - Only proceed once you've verified the facts yourself
+
+2. If you have a todo list, use it to track exploration progress
+
+3. **Fill in gaps — do NOT redo existing research**:
+   - If a research document was provided, identify only the specific gaps that need filling
+   - Read additional files directly when possible — only spawn sub-agents for searches where you don't know the file paths
+   - **Ask yourself before any research action: "Is this already covered by the provided research?"** If yes, skip it and use what's there.
+
+4. **Present findings and design options**:
+   ```
+   Based on my research, here's what I found:
+
+   **Current State:**
+   - [Key discovery about existing code]
+   - [Pattern or convention to follow]
+
+   **Design Options:**
+   1. [Option A] - [pros/cons]
+   2. [Option B] - [pros/cons]
+
+   **Open Questions:**
+   - [Technical uncertainty]
+   - [Design decision needed]
+
+   Which approach aligns best with your vision?
+   ```
+
+### Step 3: Plan Structure Development
+
+Once aligned on approach:
+
+1. **Create initial plan outline**:
+   ```
+   Here's my proposed plan structure:
+
+   ## Overview
+   [1-2 sentence summary]
+
+   ## Implementation Phases:
+   1. [Phase name] - [what it accomplishes]
+   2. [Phase name] - [what it accomplishes]
+   3. [Phase name] - [what it accomplishes]
+
+   Does this phasing make sense? Should I adjust the order or granularity?
+   ```
+
+2. **Get feedback on structure** before writing details
+
+### Step 4: Detailed Plan Writing
+
+After structure approval:
+
+1. **Gather metadata**:
+   - Run `python <skill_directory>/scripts/metadata.py` to get date, commit, branch, and repository info
+   - Determine the output filename: `docs/agents/plans/YYYY-MM-DD-description.md`
+     - YYYY-MM-DD is today's date
+     - description is a brief kebab-case description
+     - Example: `2025-01-08-improve-error-handling.md`
+     - The output folder (`docs/agents/plans/`) can be overridden by instructions in the project's `AGENTS.md` or `CLAUDE.md`
+
+2. **Write the plan** to `docs/agents/plans/YYYY-MM-DD-description.md`
+   - Ensure the `docs/agents/plans/` directory exists (create if needed)
+   - **Every actionable item must have a checkbox** (`- [ ]`) so progress can be tracked during implementation. This includes each change in "Changes Required" and each verification step in "Success Criteria".
+   - Use the template structure below:
+
+````markdown
+---
+date: [ISO date/time from metadata]
+git_commit: [Current commit hash from metadata]
+branch: [Current branch name from metadata]
+topic: "[Feature/Task Name]"
+tags: [plan, relevant-component-names]
+status: draft
+---
+
+# [Feature/Task Name] Implementation Plan
+
+## Overview
+
+[Brief description of what we're implementing and why]
+
+## Current State Analysis
+
+[What exists now, what's missing, key constraints discovered]
+
+## Desired End State
+
+[A specification of the desired end state after this plan is complete, and how to verify it]
+
+### UI Mockups (if applicable)
+[If the changes involve user-facing interfaces (CLI output, web UI, terminal UI, etc.), include ASCII mockups
+that visually illustrate the intended result. This helps the reader quickly grasp the change.]
+
+### Key Discoveries:
+- [Important finding with file:line reference]
+- [Pattern to follow]
+- [Constraint to work within]
+
+## What We're NOT Doing
+
+[Explicitly list out-of-scope items to prevent scope creep]
+
+## Implementation Approach
+
+[High-level strategy and reasoning]
+
+## Phase 1: [Descriptive Name]
+
+### Overview
+[What this phase accomplishes]
+
+### Changes Required:
+
+#### [ ] 1. [Component/File Group]
+**File**: `path/to/file.ext`
+**Changes**: [Summary of changes]
+
+```[language]
+// Specific code to add/modify
+```
+
+### Success Criteria:
+
+#### Automated Verification:
+- [ ] Tests pass: `[test command]`
+- [ ] Type checking passes: `[typecheck command]`
+- [ ] Linting passes: `[lint command]`
+
+#### Manual Verification:
+- [ ] Feature works as expected when tested
+- [ ] Edge case handling verified
+- [ ] No regressions in related features
+
+**Implementation Note**: After completing this phase and all automated verification passes, pause here for manual confirmation from the human before proceeding to the next phase.
+
+---
+
+## Phase 2: [Descriptive Name]
+
+[Similar structure with both automated and manual success criteria...]
+
+---
+
+## Testing Strategy
+
+### Unit Tests:
+- [What to test]
+- [Key edge cases]
+
+### Integration Tests:
+- [End-to-end scenarios]
+
+### Manual Testing Steps:
+1. [Specific step to verify feature]
+2. [Another verification step]
+
+## Performance Considerations
+
+[Any performance implications or optimizations needed]
+
+## Migration Notes
+
+[If applicable, how to handle existing data/systems]
+
+## References
+
+- [Related research or documentation]
+- [Similar implementation: file:line]
+````
+
+### Step 5: Review & Iterate
+
+1. **Present the draft plan location**:
+   ```
+   I've created the initial implementation plan at:
+   `docs/agents/plans/YYYY-MM-DD-description.md`
+
+   Please review it and let me know:
+   - Are the phases properly scoped?
+   - Are the success criteria specific enough?
+   - Any technical details that need adjustment?
+   - Missing edge cases or considerations?
+   ```
+
+2. **Iterate based on feedback** - be ready to:
+   - Add missing phases
+   - Adjust technical approach
+   - Clarify success criteria (both automated and manual)
+   - Add/remove scope items
+
+3. **Continue refining** until the user is satisfied
+
+## Important Guidelines
+
+1. **Be Skeptical**:
+   - Question vague requirements
+   - Identify potential issues early
+   - Ask "why" and "what about"
+   - Don't assume - verify with code
+
+2. **Be Interactive**:
+   - Don't write the full plan in one shot
+   - Get buy-in at each major step
+   - Allow course corrections
+   - Work collaboratively
+
+3. **Be Thorough But Not Redundant**:
+   - Read all context files COMPLETELY before planning
+   - Use provided research as-is — do not re-investigate what's already documented
+   - Read key source files directly into your context rather than delegating to sub-agents
+   - Only spawn sub-agents for narrow, specific questions that aren't answered by existing research
+   - Include specific file paths and line numbers
+   - Write measurable success criteria with clear automated vs manual distinction
+
+4. **Be Visual**:
+   - If the change involves any user-facing interface (web UI, CLI output, terminal UI, forms, dashboards, etc.), include ASCII mockups in the plan
+   - Mockups make the intended result immediately understandable and help catch misunderstandings early
+   - Show both the current state and the proposed state when the change modifies an existing UI
+   - Keep mockups simple but accurate enough to convey layout, key elements, and interactions
+
+5. **Be Practical**:
+   - Focus on incremental, testable changes
+   - Consider migration and rollback
+   - Think about edge cases
+   - Include "what we're NOT doing"
+
+6. **No Open Questions in Final Plan**:
+   - If you encounter open questions during planning, STOP
+   - Research or ask for clarification immediately
+   - Do NOT write the plan with unresolved questions
+   - The implementation plan must be complete and actionable
+   - Every decision must be made before finalizing the plan
+
+## Success Criteria Guidelines
+
+**Always separate success criteria into two categories:**
+
+1. **Automated Verification** (can be run by agents):
+   - Commands that can be run: test suites, linters, type checkers
+   - Specific files that should exist
+   - Code compilation/type checking
+
+2. **Manual Verification** (requires human testing):
+   - UI/UX functionality
+   - Performance under real conditions
+   - Edge cases that are hard to automate
+   - User acceptance criteria
+
+## Common Patterns
+
+### For Database Changes:
+- Start with schema/migration
+- Add store methods
+- Update business logic
+- Expose via API
+- Update clients
+
+### For New Features:
+- Research existing patterns first
+- Start with data model
+- Build backend logic
+- Add API endpoints
+- Implement UI last
+
+### For Refactoring:
+- Document current behavior
+- Plan incremental changes
+- Maintain backwards compatibility
+- Include migration strategy

.claude/skills/rpi-plan/scripts/metadata.py

@@ -0,0 +1,37 @@
+#!/usr/bin/env python3
+"""Get git metadata for plan documents."""
+
+import json
+import subprocess
+import sys
+from datetime import datetime, timezone
+from pathlib import Path
+
+
+def run(cmd: list[str]) -> str:
+    result = subprocess.run(cmd, capture_output=True, text=True)
+    return result.stdout.strip() if result.returncode == 0 else ""
+
+
+def get_repo_name() -> str:
+    remote = run(["git", "remote", "get-url", "origin"])
+    if remote:
+        name = remote.rstrip("/").rsplit("/", 1)[-1]
+        return name.removesuffix(".git")
+    root = run(["git", "rev-parse", "--show-toplevel"])
+    return Path(root).name if root else Path.cwd().name
+
+
+def main() -> None:
+    metadata = {
+        "date": datetime.now(timezone.utc).isoformat(),
+        "commit": run(["git", "rev-parse", "HEAD"]),
+        "branch": run(["git", "branch", "--show-current"]),
+        "repository": get_repo_name(),
+    }
+    json.dump(metadata, sys.stdout, indent=2)
+    print()
+
+
+if __name__ == "__main__":
+    main()

.claude/skills/rpi-research/SKILL.md

@@ -0,0 +1,146 @@
+---
+name: rpi-research
+description: Conduct deep codebase research and produce a written report. Use when the user explicitly requests research like "start a research for", "deeply investigate", or "fully understand how X works". Do not use for quick questions or simple code lookups.
+---
+
+# Research Codebase
+
+You are tasked with conducting comprehensive research across the codebase to answer user questions by spawning parallel sub-agents and synthesizing their findings.
+
+## CRITICAL: YOUR ONLY JOB IS TO DOCUMENT AND EXPLAIN THE CODEBASE AS IT EXISTS TODAY
+- DO NOT suggest improvements or changes unless the user explicitly asks for them
+- DO NOT perform root cause analysis unless the user explicitly asks for them
+- DO NOT propose future enhancements unless the user explicitly asks for them
+- DO NOT critique the implementation or identify problems
+- DO NOT recommend refactoring, optimization, or architectural changes
+- ONLY describe what exists, where it exists, how it works, and how components interact
+- You are creating a technical map/documentation of the existing system
+
+## Initial Setup
+
+If the user already provided a research question or topic alongside this command, proceed directly to step 1 below. Only if no query was given, respond with:
+```
+I'm ready to research the codebase. Please provide your research question or area of interest, and I'll analyze it thoroughly by exploring relevant components and connections.
+```
+Then wait for the user's research query.
+
+## Steps to follow after receiving the research query:
+
+1. **Read any directly mentioned files first:**
+   - If the user mentions specific files or docs, read them FULLY first
+   - **IMPORTANT**: Use the Read tool WITHOUT limit/offset parameters to read entire files
+   - **CRITICAL**: Read these files yourself in the main context before spawning any sub-tasks
+   - This ensures you have full context before decomposing the research
+
+2. **Analyze and decompose the research question:**
+   - Break down the user's query into composable research areas
+   - Take time to think deeply about the underlying patterns, connections, and architectural implications the user might be seeking
+   - Identify specific components, patterns, or concepts to investigate
+   - If you have a todo list, use it to track progress
+   - Consider which directories, files, or architectural patterns are relevant
+
+3. **Spawn parallel sub-agents to identify relevant files and map the landscape:**
+   - Create multiple Task agents to search for files and identify what's relevant
+   - Each sub-agent should focus on locating files and reporting back paths and brief summaries — NOT on deeply analyzing code
+   - The key is to use these agents for discovery:
+     - Search for files related to each research area
+     - Identify entry points, key types, and important functions
+     - Report back file paths, line numbers, and short descriptions of what each file contains
+     - Run multiple agents in parallel when they're searching for different things
+     - Remind agents they are documenting, not evaluating or improving
+   - **If the user explicitly asks for web research**, spawn additional agents with WebSearch/WebFetch tools and instruct them to return links with their findings
+
+4. **Read the most relevant files yourself in the main context:**
+   - After sub-agents report back, identify the most important files for answering the research question
+   - **Read these files yourself using the Read tool** — you need them in your own context to write an accurate, detailed research document
+   - Do NOT rely solely on sub-agent summaries for the core findings — sub-agent summaries may miss nuances, connections, or important details
+   - Prioritize files that are central to the research question; skip peripheral files that sub-agents already summarized adequately
+   - This is the step where you build deep understanding — the previous step was just finding what to read
+
+5. **Synthesize findings into a complete picture:**
+   - Combine your own reading with sub-agent discoveries
+   - Connect findings across different components
+   - Include specific file paths and line numbers for reference
+   - Highlight patterns, connections, and architectural decisions
+   - Answer the user's specific questions with concrete evidence
+
+6. **Gather metadata for the research document:**
+   - Run `python <skill_directory>/scripts/metadata.py` to get date, commit, branch, and repository info
+   - Determine the output filename: `docs/agents/research/YYYY-MM-DD-description.md`
+     - YYYY-MM-DD is today's date
+     - description is a brief kebab-case description of the research topic
+     - Example: `2025-01-08-authentication-flow.md`
+     - The output folder (`docs/agents/research/`) can be overridden by instructions in the project's `AGENTS.md` or `CLAUDE.md`
+
+7. **Generate research document:**
+   - Use the metadata gathered in step 5
+   - Ensure the `docs/agents/research/` directory exists (create if needed)
+   - Structure the document with YAML frontmatter followed by content:
+     ```markdown
+     ---
+     date: [ISO date/time from metadata]
+     git_commit: [Current commit hash from metadata]
+     branch: [Current branch name from metadata]
+     topic: "[User's Question/Topic]"
+     tags: [research, codebase, relevant-component-names]
+     status: complete
+     ---
+
+     # Research: [User's Question/Topic]
+
+     ## Research Question
+     [Original user query]
+
+     ## Summary
+     [High-level documentation of what was found, answering the user's question by describing what exists]
+
+     ## Detailed Findings
+
+     ### [Component/Area 1]
+     - Description of what exists (file.ext:line)
+     - How it connects to other components
+     - Current implementation details (without evaluation)
+
+     ### [Component/Area 2]
+     ...
+
+     ## Code References
+     - `path/to/file.py:123` - Description of what's there
+     - `another/file.ts:45-67` - Description of the code block
+
+     ## Architecture Documentation
+     [Current patterns, conventions, and design implementations found in the codebase]
+
+     ## Open Questions
+     [Any areas that need further investigation]
+     ```
+
+8. **Present findings to the user:**
+   - Present a concise summary of findings
+   - Include key file references for easy navigation
+   - Ask if they have follow-up questions or need clarification
+
+9. **Handle follow-up questions:**
+   - If the user has follow-up questions, append to the same research document
+   - Add a new section: `## Follow-up Research [timestamp]`
+   - Spawn new sub-agents as needed for additional investigation
+   - Continue updating the document
+
+## Important notes:
+- Use parallel sub-agents for file discovery and landscape mapping, but **read the most important files yourself** in the main context
+- Sub-agents are scouts that find relevant files — the main agent must read key files to build deep understanding
+- Do NOT rely solely on sub-agent summaries for your core findings; they may miss nuances and connections
+- Focus on finding concrete file paths and line numbers for developer reference
+- Research documents should be self-contained with all necessary context
+- Each sub-agent prompt should be specific and focused on locating files and reporting back paths
+- Document cross-component connections and how systems interact
+- **CRITICAL**: You and all sub-agents are documentarians, not evaluators
+- **REMEMBER**: Document what IS, not what SHOULD BE
+- **NO RECOMMENDATIONS**: Only describe the current state of the codebase
+- **File reading**: Always read mentioned files FULLY (no limit/offset) before spawning sub-tasks
+- **Critical ordering**: Follow the numbered steps exactly
+  - ALWAYS read mentioned files first before spawning sub-tasks (step 1)
+  - ALWAYS read key files yourself after sub-agents report back (step 4)
+  - ALWAYS wait for your own reading to complete before synthesizing (step 5)
+  - ALWAYS gather metadata before writing the document (step 6 before step 7)
+  - NEVER write the research document with placeholder values

.claude/skills/rpi-research/scripts/metadata.py

@@ -0,0 +1,39 @@
+#!/usr/bin/env python3
+"""Get git metadata for research documents."""
+
+import json
+import subprocess
+import sys
+from datetime import datetime, timezone
+from pathlib import Path
+
+
+def run(cmd: list[str]) -> str:
+    result = subprocess.run(cmd, capture_output=True, text=True)
+    return result.stdout.strip() if result.returncode == 0 else ""
+
+
+def get_repo_name() -> str:
+    remote = run(["git", "remote", "get-url", "origin"])
+    if remote:
+        # Handle both HTTPS and SSH URLs
+        name = remote.rstrip("/").rsplit("/", 1)[-1]
+        return name.removesuffix(".git")
+    # Fall back to directory name
+    root = run(["git", "rev-parse", "--show-toplevel"])
+    return Path(root).name if root else Path.cwd().name
+
+
+def main() -> None:
+    metadata = {
+        "date": datetime.now(timezone.utc).isoformat(),
+        "commit": run(["git", "rev-parse", "HEAD"]),
+        "branch": run(["git", "branch", "--show-current"]),
+        "repository": get_repo_name(),
+    }
+    json.dump(metadata, sys.stdout, indent=2)
+    print()
+
+
+if __name__ == "__main__":
+    main()

.dockerignore

@@ -0,0 +1,9 @@
+node_modules
+.pnpm-store
+dist
+coverage
+.git
+.claude
+.specify
+specs
+docs

.gitea/workflows/ci.yml

@@ -0,0 +1,49 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+    tags: ["*"]
+  pull_request:
+    branches: [main]
+
+jobs:
+  check:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: pnpm/action-setup@v4
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 22
+
+      - run: pnpm install --frozen-lockfile
+      - run: pnpm check
+
+  build-image:
+    if: startsWith(github.ref, 'refs/tags/')
+    needs: check
+    runs-on: host
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Log in to Gitea registry
+        run: echo "${{ secrets.REGISTRY_PASSWORD }}" | docker login git.bahamut.nitrix.one -u "${{ secrets.REGISTRY_USERNAME }}" --password-stdin
+
+      - name: Build and push
+        run: |
+          IMAGE=git.bahamut.nitrix.one/dostulata/initiative
+          TAG=${GITHUB_REF#refs/tags/}
+          docker build -t $IMAGE:$TAG -t $IMAGE:latest .
+          docker push $IMAGE:$TAG
+          docker push $IMAGE:latest
+
+      - name: Deploy
+        run: |
+          IMAGE=git.bahamut.nitrix.one/dostulata/initiative
+          TAG=${GITHUB_REF#refs/tags/}
+          docker stop initiative || true
+          docker rm initiative || true
+          docker run -d --name initiative --restart unless-stopped -p 8080:80 $IMAGE:$TAG

.jscpd.json

@@ -0,0 +1,8 @@
+{
+	"threshold": 5,
+	"minLines": 5,
+	"minTokens": 50,
+	"pattern": ["**/*.ts", "**/*.tsx"],
+	"ignore": ["node_modules", "dist", "build", "coverage", ".specify", "specs"],
+	"reporters": ["console"]
+}

.specify/memory/constitution.md

@@ -1,14 +1,10 @@
 <!--
   Sync Impact Report
   ───────────────────
-  Version change: 1.0.2 → 1.0.3 (PATCH — add merge-gate rule)
+  Version change: 2.2.1 → 3.0.0 (MAJOR — specs describe features not changes, proportional workflow)
   Modified sections:
-    - Development Workflow: added automated-checks merge gate
-  Templates requiring updates:
-    - .specify/templates/plan-template.md        ✅ no update needed
-    - .specify/templates/spec-template.md         ✅ no update needed
-    - .specify/templates/tasks-template.md        ✅ no update needed
-  Follow-up TODOs: none
+    - Development Workflow: specs are living feature documents; full pipeline for new features only
+  Templates requiring updates: none
 -->
 # Encounter Console Constitution
 
@@ -29,7 +25,7 @@ be injected at the boundary, never sourced inside the domain layer.
 
 ### II. Layered Architecture
 
-The codebase MUST be organized into four layers with strict
+The codebase MUST be organized into three layers with strict
 dependency direction:
 
 1. **Domain** — pure types, state transitions, validation rules.
@@ -39,34 +35,21 @@ dependency direction:
    interfaces that Adapters implement. May import Domain only.
 3. **Adapters** — I/O, persistence, UI rendering, external APIs.
    May import Application and Domain.
-4. **Agent** — AI-assisted features (suggestions, analysis).
-   May import Application and Domain as read-only consumers.
 
 A module in an inner layer MUST NOT import from an outer layer.
 
-### III. Agent Boundary
-
-The agent layer MAY read domain events and current state. The agent
-MAY produce suggestions, annotations, or recommendations. The agent
-MUST NOT mutate domain state directly. All agent-originated changes
-MUST flow through the Application layer as explicit user-confirmed
-commands.
-
-- Agent output MUST be clearly labeled as suggestions.
-- No silent or automatic application of agent recommendations.
-
-### IV. Clarification-First
+### III. Clarification-First
 
 Before making any non-trivial assumption during specification,
-planning, or implementation, the agent MUST surface a clarification
+planning, or implementation, Claude Code MUST surface a clarification
 question to the user. "Non-trivial" means any decision that would
 alter observable behavior, data model shape, or public API surface.
-The agent MUST also ask when multiple valid interpretations exist,
+Claude Code MUST also ask when multiple valid interpretations exist,
 when a choice would affect architectural layering, or when scope
-would expand beyond the current spec. The agent MUST NOT silently
+would expand beyond the current spec. Claude Code MUST NOT silently
 choose among valid alternatives.
 
-### V. Escalation Gates
+### IV. Escalation Gates
 
 Any feature, requirement, or scope change not present in the current
 spec MUST be rejected at implementation time until the spec is
@@ -77,7 +60,7 @@ explicitly updated. The workflow is:
 3. Update the spec via `/speckit.specify` or `/speckit.clarify`.
 4. Only then proceed with implementation.
 
-### VI. MVP Baseline Language
+### V. MVP Baseline Language
 
 Constraints in this constitution and in specs MUST use MVP baseline
 language ("MVP baseline does not include X") rather than permanent
@@ -86,7 +69,7 @@ add capabilities in future iterations without constitutional
 amendment. The current MVP baseline is local-first and single-user;
 this is a starting scope, not a permanent restriction.
 
-### VII. No Gameplay Rules in Constitution
+### VI. No Gameplay Rules in Constitution
 
 This constitution MUST NOT contain concrete gameplay mechanics,
 rule-system specifics, or encounter resolution logic. Such details
@@ -96,9 +79,9 @@ architecture, and quality — not product behavior.
 ## Scope Constraints
 
 - The Encounter Console's primary focus is initiative tracking and
-  encounter state management. Adjacent capabilities (e.g., richer
-  game-engine features) are not in the MVP baseline but may be
-  added via spec updates in future iterations.
+  encounter state management. Adjacent capabilities (e.g., bestiary
+  integration, richer game-engine features) may be added via spec
+  updates.
 - Technology choices, UI framework, and storage mechanism are
   spec-level decisions, not constitutional mandates.
 - Testing strategy (unit, integration, contract) is determined per
@@ -109,16 +92,31 @@ architecture, and quality — not product behavior.
 
 - No change may be merged unless all automated checks (tests and
   static analysis as defined by the project) pass.
-- Every feature begins with a spec (`/speckit.specify`).
-- Implementation follows the plan → tasks → implement pipeline.
+- Specs describe **features**, not individual changes. Each spec is
+  a living document. New features begin with `/speckit.specify`
+  (which creates a feature branch for the full speckit pipeline);
+  changes to existing features update the existing spec via
+  `/integrate-issue`.
+- The full pipeline (spec → plan → tasks → implement) applies to new
+  features and significant additions. Bug fixes, tooling changes,
+  and trivial UI adjustments do not require specs.
 - Domain logic MUST be testable without mocks for external systems.
 - Long-running or multi-step state transitions SHOULD be verifiable
   through reproducible event logs or snapshot-style tests.
 - Commits SHOULD be atomic and map to individual tasks where
   practical.
 - Layer boundary compliance MUST be verified by automated import
-  rules or architectural tests. Agent-assisted or manual review MAY
-  supplement but not replace automated checks.
+  rules or architectural tests.
+- All automated quality gates MUST run at the earliest feasible
+  enforcement point (currently pre-commit via Lefthook). No gate
+  may exist only as a CI step or manual process.
+- When a feature adds, removes, or changes user-facing capabilities
+  described in README.md, the README MUST be updated in the same
+  change. Features that materially alter what the product does or
+  how it is set up SHOULD also be reflected in the README.
+- When a feature changes the tech stack, project structure, or
+  architectural patterns documented in CLAUDE.md, the CLAUDE.md
+  MUST be updated in the same change.
 
 ## Governance
 
@@ -142,4 +140,4 @@ MUST comply with its principles.
 **Compliance review**: Every spec and plan MUST include a
 Constitution Check section validating adherence to all principles.
 
-**Version**: 1.0.3 | **Ratified**: 2026-03-03 | **Last Amended**: 2026-03-03
+**Version**: 3.0.0 | **Ratified**: 2026-03-03 | **Last Amended**: 2026-03-11

.specify/scripts/bash/check-prerequisites.sh

@@ -122,6 +122,10 @@ fi
 # Build list of available documents
 docs=()
 
+# Include required docs that passed validation above
+[[ -f "$FEATURE_SPEC" ]] && docs+=("spec.md")
+[[ -f "$IMPL_PLAN" ]] && docs+=("plan.md")
+
 # Always check these optional docs
 [[ -f "$RESEARCH" ]] && docs+=("research.md")
 [[ -f "$DATA_MODEL" ]] && docs+=("data-model.md")

CLAUDE.md

@@ -0,0 +1,113 @@
+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## Commands
+
+```bash
+pnpm check              # Merge gate — must pass before every commit (audit + knip + biome + typecheck + test/coverage + jscpd)
+pnpm knip               # Unused code detection (Knip)
+pnpm test               # Run all tests (Vitest)
+pnpm test:watch         # Tests in watch mode
+pnpm typecheck          # tsc --build (project references)
+pnpm lint               # Biome lint
+pnpm format             # Biome format (writes)
+pnpm --filter web dev   # Vite dev server (localhost:5173)
+pnpm --filter web build # Production build
+```
+
+Run a single test file: `pnpm vitest run packages/domain/src/__tests__/advance-turn.test.ts`
+
+## Architecture
+
+Strict layered architecture with ports/adapters and enforced dependency direction:
+
+```
+apps/web (React 19 + Vite)  →  packages/application (use cases)  →  packages/domain (pure logic)
+```
+
+- **Domain** — Pure functions, no I/O, no framework imports. All state transitions are deterministic. Errors returned as values (`DomainError`), never thrown. Adapters may throw only for programmer errors.
+- **Application** — Orchestrates domain calls via port interfaces (`EncounterStore`, `BestiarySourceCache`). No business logic here.
+- **Web** — React adapter. Implements ports using hooks/state. All UI components, routing, and user interaction live here.
+
+Layer boundaries are enforced by `scripts/check-layer-boundaries.mjs`, which runs as a Vitest test. Domain and application must never import from React, Vite, or upper layers.
+
+### Data & Storage
+
+- **localStorage** — encounter persistence (adapter layer, JSON serialization)
+- **IndexedDB** — bestiary source cache (`apps/web/src/adapters/bestiary-cache.ts`, via `idb` wrapper)
+- **`data/bestiary/index.json`** — pre-built search index for creature lookup, generated by `scripts/generate-bestiary-index.mjs`
+
+### Project Structure
+
+```
+apps/web/                  React app — components, hooks, adapters
+packages/domain/src/       Pure state transitions, types, validation
+packages/application/src/  Use cases, port interfaces
+data/bestiary/             Bestiary search index
+scripts/                   Build tooling (layer checks, index generation)
+specs/NNN-feature-name/    Feature specs (spec.md, plan.md, tasks.md)
+.specify/                  Speckit config (templates, scripts, constitution)
+docs/agents/               RPI skill artifacts (research reports, plans)
+.claude/skills/            Agent skills (rpi-research, rpi-plan, rpi-implement)
+```
+
+## Tech Stack
+
+- TypeScript 5.8 (strict mode, `verbatimModuleSyntax`)
+- React 19, Vite 6, Tailwind CSS v4
+- Lucide React (icons)
+- `idb` (IndexedDB wrapper for bestiary cache)
+- Biome 2.0 (formatting + linting), Knip (unused code), jscpd (copy-paste detection)
+- Vitest (testing, v8 coverage), Lefthook (pre-commit hooks)
+
+## Conventions
+
+- **Biome 2.0** for formatting and linting (no Prettier, no ESLint). Tab indentation, 80-char lines. Imports are auto-organized alphabetically.
+- **TypeScript strict mode** with `verbatimModuleSyntax`. Use `.js` extensions in relative imports when required by the repo's ESM settings (e.g., `./types.js`).
+- **Branded types** for identity values (e.g., `CombatantId`). Prefer immutability/`readonly` where practical.
+- **Domain events** are plain data objects with a `type` discriminant — no classes.
+- **Tests** live in `packages/*/src/__tests__/*.test.ts`. Test pure functions directly; map acceptance scenarios and invariants from specs to individual `it()` blocks.
+- **Feature specs** live in `specs/NNN-feature-name/` with spec.md (and optionally plan.md, tasks.md for new work). Specs describe features, not individual changes. The project constitution is at `.specify/memory/constitution.md`.
+- **Quality gates** are enforced at pre-commit via Lefthook's `pnpm check` — the project's single earliest enforcement point. No gate may exist only as a CI step or manual process.
+
+## Speckit Workflow
+
+Speckit (`/speckit.*` skills) manages the spec-driven development pipeline. Specs are **living documents** that describe features, not individual changes.
+
+### Issue-driven workflow
+- `/write-issue` — create a well-structured Gitea issue via interactive interview
+- `/integrate-issue <number>` — fetch an issue, route it to the right spec, and update the spec with the new/changed requirements. Then implement directly.
+- `/sync-issue <number>` — push acceptance criteria from the spec back to the Gitea issue
+
+### RPI skills (Research → Plan → Implement)
+- `rpi-research` — deep codebase research producing a written report in `docs/agents/research/`
+- `rpi-plan` — interactive phased implementation plan in `docs/agents/plans/`
+- `rpi-implement` — execute a plan file phase by phase with automated + manual verification
+
+### Choosing the right workflow by scope
+
+| Scope | Workflow |
+|---|---|
+| Bug fix / CSS tweak | Just fix it, commit |
+| Small change to existing feature | `/integrate-issue` → implement → commit |
+| Larger addition to existing feature | `/integrate-issue` → `rpi-research` → `rpi-plan` → `rpi-implement` |
+| New feature | `/speckit.specify` → `/speckit.clarify` → `/speckit.plan` → `/speckit.tasks` → `/speckit.implement` |
+
+Speckit manages **what** to build (specs as living documents). RPI manages **how** to build it (research, planning, execution). The full speckit pipeline is for new features. For changes to existing features, update the spec via `/integrate-issue`, then use RPI skills if the change is non-trivial.
+
+### Current feature specs
+- `specs/001-combatant-management/` — CRUD, persistence, clear, batch add, confirm buttons
+- `specs/002-turn-tracking/` — rounds, turn order, advance/retreat, top bar
+- `specs/003-combatant-state/` — HP, AC, conditions, concentration, initiative
+- `specs/004-bestiary/` — search index, stat blocks, source management, panel UX
+
+## Constitution (key principles)
+
+The constitution (`.specify/memory/constitution.md`) governs all feature work:
+
+1. **Deterministic Domain Core** — Pure state transitions only; no I/O, randomness, or clocks in domain.
+2. **Layered Architecture** — Domain → Application → Adapters. Never skip layers or reverse dependencies.
+3. **Clarification-First** — Ask before making non-trivial assumptions.
+4. **MVP Baseline** — Say "MVP baseline does not include X", never permanent bans.
+5. **Spec-driven features** — Features are described in living specs; evolve existing specs via `/integrate-issue`, create new ones via `/speckit.specify`. Bug fixes and tooling changes do not require specs.

Dockerfile

@@ -0,0 +1,19 @@
+FROM node:22-slim AS build
+ENV PNPM_HOME="/pnpm"
+ENV PATH="$PNPM_HOME:$PATH"
+RUN corepack enable
+
+WORKDIR /app
+COPY package.json pnpm-lock.yaml pnpm-workspace.yaml ./
+COPY packages/domain/package.json packages/domain/
+COPY packages/application/package.json packages/application/
+COPY apps/web/package.json apps/web/
+RUN pnpm install --frozen-lockfile --ignore-scripts
+
+COPY . .
+RUN pnpm --filter web build
+
+FROM nginx:alpine
+COPY --from=build /app/apps/web/dist /usr/share/nginx/html
+COPY nginx.conf /etc/nginx/conf.d/default.conf
+EXPOSE 80

README.md

@@ -0,0 +1,55 @@
+# Encounter Console
+
+A local-first initiative tracker and encounter manager for tabletop RPGs (D&D 5e / 2024). Runs entirely in the browser — no server, no account, no data leaves your machine.
+
+## What it does
+
+- **Initiative tracking** — add combatants (batch-add from bestiary, custom creatures with optional stats), roll initiative (manual or d20), cycle turns and rounds
+- **Encounter state** — HP, AC, conditions, concentration tracking with visual status indicators
+- **Bestiary integration** — import bestiary JSON sources, search creatures, and view full stat blocks
+- **Persistent** — encounters survive page reloads via localStorage; bestiary data cached in IndexedDB
+
+## Prerequisites
+
+- Node.js 22+
+- pnpm 10.6+
+
+## Getting Started
+
+```sh
+pnpm install
+pnpm --filter web dev
+```
+
+Open `http://localhost:5173`.
+
+## Scripts
+
+| Command | Description |
+|---------|-------------|
+| `pnpm --filter web dev` | Start the dev server |
+| `pnpm --filter web build` | Production build |
+| `pnpm test` | Run all tests (Vitest) |
+| `pnpm check` | Full merge gate (knip, biome, typecheck, test, jscpd) |
+
+## Project Structure
+
+```
+apps/web/          React 19 + Vite — UI components, hooks, adapters
+packages/domain/   Pure functions — state transitions, types, validation
+packages/app/      Use cases — orchestrates domain via port interfaces
+data/bestiary/     Bestiary index for creature search
+scripts/           Build tooling (layer boundary checks, index generation)
+specs/             Feature specifications (spec → plan → tasks)
+```
+
+## Architecture
+
+Strict layered architecture with enforced dependency direction:
+
+```
+apps/web (adapters)  →  packages/application (use cases)  →  packages/domain (pure logic)
+```
+
+Domain is pure — no I/O, no randomness, no framework imports. Layer boundaries are enforced by automated import checks that run as part of the test suite. See [CLAUDE.md](./CLAUDE.md) for full conventions.
+

apps/web/package.json

@@ -11,13 +11,23 @@
 	"dependencies": {
 		"@initiative/application": "workspace:*",
 		"@initiative/domain": "workspace:*",
+		"class-variance-authority": "^0.7.1",
+		"clsx": "^2.1.1",
+		"idb": "^8.0.3",
+		"lucide-react": "^0.577.0",
 		"react": "^19.0.0",
-		"react-dom": "^19.0.0"
+		"react-dom": "^19.0.0",
+		"tailwind-merge": "^3.5.0"
 	},
 	"devDependencies": {
+		"@tailwindcss/vite": "^4.2.1",
+		"@testing-library/jest-dom": "^6.9.1",
+		"@testing-library/react": "^16.3.2",
 		"@types/react": "^19.0.0",
 		"@types/react-dom": "^19.0.0",
 		"@vitejs/plugin-react": "^4.3.0",
+		"jsdom": "^28.1.0",
+		"tailwindcss": "^4.2.1",
 		"vite": "^6.2.0"
 	}
 }

apps/web/src/App.tsx

@@ -1,3 +1,326 @@
-export function App() {
-	return <div>Initiative Tracker</div>;
+import {
+	rollAllInitiativeUseCase,
+	rollInitiativeUseCase,
+} from "@initiative/application";
+import type { CombatantId, Creature, CreatureId } from "@initiative/domain";
+import { useCallback, useEffect, useRef, useState } from "react";
+import { ActionBar } from "./components/action-bar";
+import { CombatantRow } from "./components/combatant-row";
+import { SourceManager } from "./components/source-manager";
+import { StatBlockPanel } from "./components/stat-block-panel";
+import { Toast } from "./components/toast";
+import { TurnNavigation } from "./components/turn-navigation";
+import { type SearchResult, useBestiary } from "./hooks/use-bestiary";
+import { useBulkImport } from "./hooks/use-bulk-import";
+import { useEncounter } from "./hooks/use-encounter";
+
+function rollDice(): number {
+	return Math.floor(Math.random() * 20) + 1;
+}
+
+export function App() {
+	const {
+		encounter,
+		advanceTurn,
+		retreatTurn,
+		addCombatant,
+		clearEncounter,
+		removeCombatant,
+		editCombatant,
+		setInitiative,
+		setHp,
+		adjustHp,
+		setAc,
+		toggleCondition,
+		toggleConcentration,
+		addFromBestiary,
+		makeStore,
+	} = useEncounter();
+
+	const {
+		search,
+		getCreature,
+		isLoaded,
+		isSourceCached,
+		fetchAndCacheSource,
+		uploadAndCacheSource,
+		refreshCache,
+	} = useBestiary();
+
+	const bulkImport = useBulkImport();
+
+	const [selectedCreatureId, setSelectedCreatureId] =
+		useState<CreatureId | null>(null);
+	const [bulkImportMode, setBulkImportMode] = useState(false);
+	const [sourceManagerOpen, setSourceManagerOpen] = useState(false);
+	const [isRightPanelFolded, setIsRightPanelFolded] = useState(false);
+	const [pinnedCreatureId, setPinnedCreatureId] = useState<CreatureId | null>(
+		null,
+	);
+	const [isWideDesktop, setIsWideDesktop] = useState(
+		() => window.matchMedia("(min-width: 1280px)").matches,
+	);
+
+	useEffect(() => {
+		const mq = window.matchMedia("(min-width: 1280px)");
+		const handler = (e: MediaQueryListEvent) => setIsWideDesktop(e.matches);
+		mq.addEventListener("change", handler);
+		return () => mq.removeEventListener("change", handler);
+	}, []);
+
+	const selectedCreature: Creature | null = selectedCreatureId
+		? (getCreature(selectedCreatureId) ?? null)
+		: null;
+
+	const pinnedCreature: Creature | null = pinnedCreatureId
+		? (getCreature(pinnedCreatureId) ?? null)
+		: null;
+
+	const handleAddFromBestiary = useCallback(
+		(result: SearchResult) => {
+			addFromBestiary(result);
+			// Derive the creature ID so stat block panel can try to show it
+			const slug = result.name
+				.toLowerCase()
+				.replace(/[^a-z0-9]+/g, "-")
+				.replace(/(^-|-$)/g, "");
+			setSelectedCreatureId(
+				`${result.source.toLowerCase()}:${slug}` as CreatureId,
+			);
+		},
+		[addFromBestiary],
+	);
+
+	const handleCombatantStatBlock = useCallback((creatureId: string) => {
+		setSelectedCreatureId(creatureId as CreatureId);
+		setIsRightPanelFolded(false);
+	}, []);
+
+	const handleRollInitiative = useCallback(
+		(id: CombatantId) => {
+			rollInitiativeUseCase(makeStore(), id, rollDice(), getCreature);
+		},
+		[makeStore, getCreature],
+	);
+
+	const handleRollAllInitiative = useCallback(() => {
+		rollAllInitiativeUseCase(makeStore(), rollDice, getCreature);
+	}, [makeStore, getCreature]);
+
+	const handleViewStatBlock = useCallback((result: SearchResult) => {
+		const slug = result.name
+			.toLowerCase()
+			.replace(/[^a-z0-9]+/g, "-")
+			.replace(/(^-|-$)/g, "");
+		const cId = `${result.source.toLowerCase()}:${slug}` as CreatureId;
+		setSelectedCreatureId(cId);
+		setIsRightPanelFolded(false);
+	}, []);
+
+	const handleBulkImport = useCallback(() => {
+		setBulkImportMode(true);
+		setSelectedCreatureId(null);
+	}, []);
+
+	const handleStartBulkImport = useCallback(
+		(baseUrl: string) => {
+			bulkImport.startImport(
+				baseUrl,
+				fetchAndCacheSource,
+				isSourceCached,
+				refreshCache,
+			);
+		},
+		[bulkImport.startImport, fetchAndCacheSource, isSourceCached, refreshCache],
+	);
+
+	const handleBulkImportDone = useCallback(() => {
+		setBulkImportMode(false);
+		bulkImport.reset();
+	}, [bulkImport.reset]);
+
+	const handleDismissBrowsePanel = useCallback(() => {
+		setSelectedCreatureId(null);
+		setBulkImportMode(false);
+	}, []);
+
+	const handleToggleFold = useCallback(() => {
+		setIsRightPanelFolded((f) => !f);
+	}, []);
+
+	const handlePin = useCallback(() => {
+		if (selectedCreatureId) {
+			setPinnedCreatureId((prev) =>
+				prev === selectedCreatureId ? null : selectedCreatureId,
+			);
+		}
+	}, [selectedCreatureId]);
+
+	const handleUnpin = useCallback(() => {
+		setPinnedCreatureId(null);
+	}, []);
+
+	// Auto-scroll to the active combatant when the turn changes
+	const activeRowRef = useRef<HTMLDivElement>(null);
+	useEffect(() => {
+		activeRowRef.current?.scrollIntoView({
+			block: "nearest",
+			behavior: "smooth",
+		});
+	}, [encounter.activeIndex]);
+
+	// Auto-show stat block for the active combatant when turn changes,
+	// but only when the viewport is wide enough to show it alongside the tracker.
+	// Only react to activeIndex changes — not combatant reordering (e.g. Roll All).
+	const prevActiveIndexRef = useRef(encounter.activeIndex);
+	useEffect(() => {
+		if (prevActiveIndexRef.current === encounter.activeIndex) return;
+		prevActiveIndexRef.current = encounter.activeIndex;
+		if (!window.matchMedia("(min-width: 1024px)").matches) return;
+		const active = encounter.combatants[encounter.activeIndex];
+		if (!active?.creatureId || !isLoaded) return;
+		setSelectedCreatureId(active.creatureId as CreatureId);
+	}, [encounter.activeIndex, encounter.combatants, isLoaded]);
+
+	return (
+		<div className="flex h-screen flex-col">
+			<div className="mx-auto flex w-full max-w-2xl flex-1 flex-col gap-3 px-4 min-h-0">
+				{/* Turn Navigation — fixed at top */}
+				<div className="shrink-0 pt-8">
+					<TurnNavigation
+						encounter={encounter}
+						onAdvanceTurn={advanceTurn}
+						onRetreatTurn={retreatTurn}
+						onClearEncounter={clearEncounter}
+						onRollAllInitiative={handleRollAllInitiative}
+						onOpenSourceManager={() => setSourceManagerOpen((o) => !o)}
+					/>
+				</div>
+
+				{sourceManagerOpen && (
+					<div className="shrink-0 rounded-md border border-border bg-card px-4 py-3">
+						<SourceManager onCacheCleared={refreshCache} />
+					</div>
+				)}
+
+				{/* Scrollable area — combatant list */}
+				<div className="flex-1 overflow-y-auto min-h-0">
+					<div className="flex flex-col px-2 py-2">
+						{encounter.combatants.length === 0 ? (
+							<p className="py-12 text-center text-sm text-muted-foreground">
+								No combatants yet — add one to get started
+							</p>
+						) : (
+							encounter.combatants.map((c, i) => (
+								<CombatantRow
+									key={c.id}
+									ref={i === encounter.activeIndex ? activeRowRef : null}
+									combatant={c}
+									isActive={i === encounter.activeIndex}
+									onRename={editCombatant}
+									onSetInitiative={setInitiative}
+									onRemove={removeCombatant}
+									onSetHp={setHp}
+									onAdjustHp={adjustHp}
+									onSetAc={setAc}
+									onToggleCondition={toggleCondition}
+									onToggleConcentration={toggleConcentration}
+									onShowStatBlock={
+										c.creatureId
+											? () => handleCombatantStatBlock(c.creatureId as string)
+											: undefined
+									}
+									onRollInitiative={
+										c.creatureId ? handleRollInitiative : undefined
+									}
+								/>
+							))
+						)}
+					</div>
+				</div>
+
+				{/* Action Bar — fixed at bottom */}
+				<div className="shrink-0 pb-8">
+					<ActionBar
+						onAddCombatant={addCombatant}
+						onAddFromBestiary={handleAddFromBestiary}
+						bestiarySearch={search}
+						bestiaryLoaded={isLoaded}
+						onViewStatBlock={handleViewStatBlock}
+						onBulkImport={handleBulkImport}
+						bulkImportDisabled={bulkImport.state.status === "loading"}
+					/>
+				</div>
+			</div>
+
+			{/* Pinned Stat Block Panel (left) */}
+			{pinnedCreatureId && isWideDesktop && (
+				<StatBlockPanel
+					creatureId={pinnedCreatureId}
+					creature={pinnedCreature}
+					isSourceCached={isSourceCached}
+					fetchAndCacheSource={fetchAndCacheSource}
+					uploadAndCacheSource={uploadAndCacheSource}
+					refreshCache={refreshCache}
+					panelRole="pinned"
+					isFolded={false}
+					onToggleFold={() => {}}
+					onPin={() => {}}
+					onUnpin={handleUnpin}
+					showPinButton={false}
+					side="left"
+					onDismiss={() => {}}
+				/>
+			)}
+
+			{/* Browse Stat Block Panel (right) */}
+			<StatBlockPanel
+				creatureId={selectedCreatureId}
+				creature={selectedCreature}
+				isSourceCached={isSourceCached}
+				fetchAndCacheSource={fetchAndCacheSource}
+				uploadAndCacheSource={uploadAndCacheSource}
+				refreshCache={refreshCache}
+				panelRole="browse"
+				isFolded={isRightPanelFolded}
+				onToggleFold={handleToggleFold}
+				onPin={handlePin}
+				onUnpin={() => {}}
+				showPinButton={isWideDesktop && !!selectedCreature}
+				side="right"
+				onDismiss={handleDismissBrowsePanel}
+				bulkImportMode={bulkImportMode}
+				bulkImportState={bulkImport.state}
+				onStartBulkImport={handleStartBulkImport}
+				onBulkImportDone={handleBulkImportDone}
+			/>
+
+			{/* Toast for bulk import progress when panel is closed */}
+			{bulkImport.state.status === "loading" && !bulkImportMode && (
+				<Toast
+					message={`Loading sources... ${bulkImport.state.completed + bulkImport.state.failed}/${bulkImport.state.total}`}
+					progress={
+						bulkImport.state.total > 0
+							? (bulkImport.state.completed + bulkImport.state.failed) /
+								bulkImport.state.total
+							: 0
+					}
+					onDismiss={() => {}}
+				/>
+			)}
+			{bulkImport.state.status === "complete" && !bulkImportMode && (
+				<Toast
+					message="All sources loaded"
+					onDismiss={bulkImport.reset}
+					autoDismissMs={3000}
+				/>
+			)}
+			{bulkImport.state.status === "partial-failure" && !bulkImportMode && (
+				<Toast
+					message={`Loaded ${bulkImport.state.completed}/${bulkImport.state.total} sources (${bulkImport.state.failed} failed)`}
+					onDismiss={bulkImport.reset}
+				/>
+			)}
+		</div>
+	);
 }

apps/web/src/__tests__/bestiary-index-helpers.test.ts

@@ -0,0 +1,40 @@
+import { describe, expect, it } from "vitest";
+import {
+	getAllSourceCodes,
+	getDefaultFetchUrl,
+} from "../adapters/bestiary-index-adapter.js";
+
+describe("getAllSourceCodes", () => {
+	it("returns all keys from the index sources object", () => {
+		const codes = getAllSourceCodes();
+		expect(codes.length).toBeGreaterThan(0);
+		expect(Array.isArray(codes)).toBe(true);
+		for (const code of codes) {
+			expect(typeof code).toBe("string");
+		}
+	});
+});
+
+describe("getDefaultFetchUrl", () => {
+	it("returns the default URL when no baseUrl is provided", () => {
+		const url = getDefaultFetchUrl("XMM");
+		expect(url).toBe(
+			"https://raw.githubusercontent.com/5etools-mirror-3/5etools-src/main/data/bestiary/bestiary-xmm.json",
+		);
+	});
+
+	it("constructs URL from baseUrl with trailing slash", () => {
+		const url = getDefaultFetchUrl("PHB", "https://example.com/data/");
+		expect(url).toBe("https://example.com/data/bestiary-phb.json");
+	});
+
+	it("normalizes baseUrl without trailing slash", () => {
+		const url = getDefaultFetchUrl("PHB", "https://example.com/data");
+		expect(url).toBe("https://example.com/data/bestiary-phb.json");
+	});
+
+	it("lowercases the source code in the filename", () => {
+		const url = getDefaultFetchUrl("MM", "https://example.com/");
+		expect(url).toBe("https://example.com/bestiary-mm.json");
+	});
+});

apps/web/src/__tests__/confirm-button.test.tsx

@@ -0,0 +1,218 @@
+// @vitest-environment jsdom
+import {
+	act,
+	cleanup,
+	fireEvent,
+	render,
+	screen,
+} from "@testing-library/react";
+import "@testing-library/jest-dom/vitest";
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+import { ConfirmButton } from "../components/ui/confirm-button";
+
+function XIcon() {
+	return <span data-testid="x-icon">X</span>;
+}
+
+function renderButton(
+	props: Partial<Parameters<typeof ConfirmButton>[0]> = {},
+) {
+	const onConfirm = props.onConfirm ?? vi.fn();
+	render(
+		<ConfirmButton
+			icon={<XIcon />}
+			label="Remove combatant"
+			onConfirm={onConfirm}
+			{...props}
+		/>,
+	);
+	return { onConfirm };
+}
+
+describe("ConfirmButton", () => {
+	beforeEach(() => {
+		vi.useFakeTimers();
+	});
+
+	afterEach(() => {
+		vi.useRealTimers();
+		cleanup();
+	});
+
+	it("renders the default icon in idle state", () => {
+		renderButton();
+		expect(screen.getByTestId("x-icon")).toBeTruthy();
+		expect(screen.getByRole("button")).toHaveAttribute(
+			"aria-label",
+			"Remove combatant",
+		);
+	});
+
+	it("transitions to confirm state with Check icon on first click", () => {
+		renderButton();
+		fireEvent.click(screen.getByRole("button"));
+
+		expect(screen.queryByTestId("x-icon")).toBeNull();
+		expect(screen.getByRole("button")).toHaveAttribute(
+			"aria-label",
+			"Confirm remove combatant",
+		);
+		expect(screen.getByRole("button").className).toContain("bg-destructive");
+	});
+
+	it("calls onConfirm on second click in confirm state", () => {
+		const { onConfirm } = renderButton();
+		const button = screen.getByRole("button");
+
+		fireEvent.click(button);
+		fireEvent.click(button);
+
+		expect(onConfirm).toHaveBeenCalledOnce();
+	});
+
+	it("auto-reverts after 5 seconds", () => {
+		renderButton();
+		fireEvent.click(screen.getByRole("button"));
+
+		expect(screen.queryByTestId("x-icon")).toBeNull();
+
+		act(() => {
+			vi.advanceTimersByTime(5000);
+		});
+
+		expect(screen.getByTestId("x-icon")).toBeTruthy();
+	});
+
+	it("reverts on Escape key", () => {
+		renderButton();
+		fireEvent.click(screen.getByRole("button"));
+
+		expect(screen.queryByTestId("x-icon")).toBeNull();
+
+		fireEvent.keyDown(document, { key: "Escape" });
+
+		expect(screen.getByTestId("x-icon")).toBeTruthy();
+	});
+
+	it("reverts on click outside", () => {
+		renderButton();
+		fireEvent.click(screen.getByRole("button"));
+
+		expect(screen.queryByTestId("x-icon")).toBeNull();
+
+		fireEvent.mouseDown(document.body);
+
+		expect(screen.getByTestId("x-icon")).toBeTruthy();
+	});
+
+	it("does not enter confirm state when disabled", () => {
+		renderButton({ disabled: true });
+		fireEvent.click(screen.getByRole("button"));
+
+		expect(screen.getByTestId("x-icon")).toBeTruthy();
+	});
+
+	it("cleans up timer on unmount", () => {
+		const clearTimeoutSpy = vi.spyOn(globalThis, "clearTimeout");
+		renderButton();
+		fireEvent.click(screen.getByRole("button"));
+
+		cleanup();
+
+		expect(clearTimeoutSpy).toHaveBeenCalled();
+		clearTimeoutSpy.mockRestore();
+	});
+
+	it("manages independent instances separately", () => {
+		const onConfirm1 = vi.fn();
+		const onConfirm2 = vi.fn();
+
+		render(
+			<>
+				<ConfirmButton
+					icon={<span data-testid="icon-1">1</span>}
+					label="Remove first"
+					onConfirm={onConfirm1}
+				/>
+				<ConfirmButton
+					icon={<span data-testid="icon-2">2</span>}
+					label="Remove second"
+					onConfirm={onConfirm2}
+				/>
+			</>,
+		);
+
+		const buttons = screen.getAllByRole("button");
+		fireEvent.click(buttons[0]);
+
+		// First is confirming, second is still idle
+		expect(screen.queryByTestId("icon-1")).toBeNull();
+		expect(screen.getByTestId("icon-2")).toBeTruthy();
+	});
+
+	// T008: Keyboard-specific tests
+	it("Enter key triggers confirm state", () => {
+		renderButton();
+		const button = screen.getByRole("button");
+
+		// Native button handles Enter via click event
+		fireEvent.click(button);
+
+		expect(screen.queryByTestId("x-icon")).toBeNull();
+		expect(button).toHaveAttribute("aria-label", "Confirm remove combatant");
+	});
+
+	it("Enter in confirm state calls onConfirm", () => {
+		const { onConfirm } = renderButton();
+		const button = screen.getByRole("button");
+
+		fireEvent.click(button); // enter confirm state
+		fireEvent.click(button); // confirm
+
+		expect(onConfirm).toHaveBeenCalledOnce();
+	});
+
+	it("Escape in confirm state reverts", () => {
+		renderButton();
+		fireEvent.click(screen.getByRole("button"));
+
+		fireEvent.keyDown(document, { key: "Escape" });
+
+		expect(screen.getByTestId("x-icon")).toBeTruthy();
+		expect(screen.getByRole("button")).toHaveAttribute(
+			"aria-label",
+			"Remove combatant",
+		);
+	});
+
+	it("blur event reverts confirm state", () => {
+		renderButton();
+		const button = screen.getByRole("button");
+
+		fireEvent.click(button);
+		expect(screen.queryByTestId("x-icon")).toBeNull();
+
+		fireEvent.blur(button);
+		expect(screen.getByTestId("x-icon")).toBeTruthy();
+	});
+
+	it("Enter/Space keydown stops propagation to prevent parent handlers", () => {
+		const parentHandler = vi.fn();
+		render(
+			// biome-ignore lint/a11y/noStaticElementInteractions: test wrapper
+			<div onKeyDown={parentHandler}>
+				<ConfirmButton
+					icon={<XIcon />}
+					label="Remove combatant"
+					onConfirm={vi.fn()}
+				/>
+			</div>,
+		);
+		const button = screen.getByRole("button");
+
+		fireEvent.keyDown(button, { key: "Enter" });
+		fireEvent.keyDown(button, { key: " " });
+
+		expect(parentHandler).not.toHaveBeenCalled();
+	});
+});

apps/web/src/__tests__/stat-block-fold-pin.test.tsx

@@ -0,0 +1,263 @@
+// @vitest-environment jsdom
+import "@testing-library/jest-dom/vitest";
+
+import type { Creature, CreatureId } from "@initiative/domain";
+import { cleanup, fireEvent, render, screen } from "@testing-library/react";
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+import { StatBlockPanel } from "../components/stat-block-panel";
+
+const CREATURE_ID = "srd:goblin" as CreatureId;
+const CREATURE: Creature = {
+	id: CREATURE_ID,
+	name: "Goblin",
+	source: "SRD",
+	sourceDisplayName: "SRD",
+	size: "Small",
+	type: "humanoid",
+	alignment: "neutral evil",
+	ac: 15,
+	hp: { average: 7, formula: "2d6" },
+	speed: "30 ft.",
+	abilities: { str: 8, dex: 14, con: 10, int: 10, wis: 8, cha: 8 },
+	cr: "1/4",
+	initiativeProficiency: 0,
+	proficiencyBonus: 2,
+	passive: 9,
+};
+
+function mockMatchMedia(matches: boolean) {
+	Object.defineProperty(window, "matchMedia", {
+		writable: true,
+		value: vi.fn().mockImplementation((query: string) => ({
+			matches,
+			media: query,
+			onchange: null,
+			addListener: vi.fn(),
+			removeListener: vi.fn(),
+			addEventListener: vi.fn(),
+			removeEventListener: vi.fn(),
+			dispatchEvent: vi.fn(),
+		})),
+	});
+}
+
+interface PanelProps {
+	creatureId?: CreatureId | null;
+	creature?: Creature | null;
+	panelRole?: "browse" | "pinned";
+	isFolded?: boolean;
+	onToggleFold?: () => void;
+	onPin?: () => void;
+	onUnpin?: () => void;
+	showPinButton?: boolean;
+	side?: "left" | "right";
+	onDismiss?: () => void;
+	bulkImportMode?: boolean;
+}
+
+function renderPanel(overrides: PanelProps = {}) {
+	const props = {
+		creatureId: CREATURE_ID,
+		creature: CREATURE,
+		isSourceCached: vi.fn().mockResolvedValue(true),
+		fetchAndCacheSource: vi.fn(),
+		uploadAndCacheSource: vi.fn(),
+		refreshCache: vi.fn(),
+		panelRole: "browse" as const,
+		isFolded: false,
+		onToggleFold: vi.fn(),
+		onPin: vi.fn(),
+		onUnpin: vi.fn(),
+		showPinButton: false,
+		side: "right" as const,
+		onDismiss: vi.fn(),
+		...overrides,
+	};
+
+	render(<StatBlockPanel {...props} />);
+	return props;
+}
+
+describe("Stat Block Panel Fold/Unfold and Pin", () => {
+	beforeEach(() => {
+		mockMatchMedia(true); // desktop by default
+	});
+
+	afterEach(cleanup);
+
+	describe("US1: Fold and Unfold", () => {
+		it("shows fold button instead of close button on desktop", () => {
+			renderPanel();
+			expect(
+				screen.getByRole("button", { name: "Fold stat block panel" }),
+			).toBeInTheDocument();
+			expect(
+				screen.queryByRole("button", { name: /close/i }),
+			).not.toBeInTheDocument();
+		});
+
+		it("does not show 'Stat Block' heading", () => {
+			renderPanel();
+			expect(screen.queryByText("Stat Block")).not.toBeInTheDocument();
+		});
+
+		it("renders folded tab with creature name when isFolded is true", () => {
+			renderPanel({ isFolded: true });
+			expect(screen.getByText("Goblin")).toBeInTheDocument();
+			expect(
+				screen.getByRole("button", { name: "Unfold stat block panel" }),
+			).toBeInTheDocument();
+		});
+
+		it("calls onToggleFold when fold button is clicked", () => {
+			const props = renderPanel();
+			fireEvent.click(
+				screen.getByRole("button", { name: "Fold stat block panel" }),
+			);
+			expect(props.onToggleFold).toHaveBeenCalledTimes(1);
+		});
+
+		it("calls onToggleFold when folded tab is clicked", () => {
+			const props = renderPanel({ isFolded: true });
+			fireEvent.click(
+				screen.getByRole("button", { name: "Unfold stat block panel" }),
+			);
+			expect(props.onToggleFold).toHaveBeenCalledTimes(1);
+		});
+
+		it("applies translate-x class when folded (right side)", () => {
+			renderPanel({ isFolded: true, side: "right" });
+			const panel = screen
+				.getByRole("button", { name: "Unfold stat block panel" })
+				.closest("div");
+			expect(panel?.className).toContain("translate-x-[calc(100%-40px)]");
+		});
+
+		it("applies translate-x-0 when expanded", () => {
+			renderPanel({ isFolded: false });
+			const foldBtn = screen.getByRole("button", {
+				name: "Fold stat block panel",
+			});
+			const panel = foldBtn.closest("div.fixed") as HTMLElement;
+			expect(panel?.className).toContain("translate-x-0");
+		});
+	});
+
+	describe("US1: Mobile behavior", () => {
+		beforeEach(() => {
+			mockMatchMedia(false); // mobile
+		});
+
+		it("shows fold button instead of X close button on mobile drawer", () => {
+			renderPanel();
+			expect(
+				screen.getByRole("button", { name: "Fold stat block panel" }),
+			).toBeInTheDocument();
+			// No X close icon button — only backdrop dismiss and fold toggle
+			const buttons = screen.getAllByRole("button");
+			const buttonLabels = buttons.map((b) => b.getAttribute("aria-label"));
+			expect(buttonLabels).not.toContain("Close");
+		});
+
+		it("calls onDismiss when backdrop is clicked on mobile", () => {
+			const props = renderPanel();
+			fireEvent.click(screen.getByRole("button", { name: "Close stat block" }));
+			expect(props.onDismiss).toHaveBeenCalledTimes(1);
+		});
+
+		it("does not render pinned panel on mobile", () => {
+			const { container } = render(
+				<StatBlockPanel
+					creatureId={CREATURE_ID}
+					creature={CREATURE}
+					isSourceCached={vi.fn().mockResolvedValue(true)}
+					fetchAndCacheSource={vi.fn()}
+					uploadAndCacheSource={vi.fn()}
+					refreshCache={vi.fn()}
+					panelRole="pinned"
+					isFolded={false}
+					onToggleFold={vi.fn()}
+					onPin={vi.fn()}
+					onUnpin={vi.fn()}
+					showPinButton={false}
+					side="left"
+					onDismiss={vi.fn()}
+				/>,
+			);
+			expect(container.innerHTML).toBe("");
+		});
+	});
+
+	describe("US2: Pin and Unpin", () => {
+		it("shows pin button when showPinButton is true on desktop", () => {
+			renderPanel({ showPinButton: true });
+			expect(
+				screen.getByRole("button", { name: "Pin creature" }),
+			).toBeInTheDocument();
+		});
+
+		it("hides pin button when showPinButton is false", () => {
+			renderPanel({ showPinButton: false });
+			expect(
+				screen.queryByRole("button", { name: "Pin creature" }),
+			).not.toBeInTheDocument();
+		});
+
+		it("calls onPin when pin button is clicked", () => {
+			const props = renderPanel({ showPinButton: true });
+			fireEvent.click(screen.getByRole("button", { name: "Pin creature" }));
+			expect(props.onPin).toHaveBeenCalledTimes(1);
+		});
+
+		it("shows unpin button for pinned role", () => {
+			renderPanel({ panelRole: "pinned", side: "left" });
+			expect(
+				screen.getByRole("button", { name: "Unpin creature" }),
+			).toBeInTheDocument();
+		});
+
+		it("calls onUnpin when unpin button is clicked", () => {
+			const props = renderPanel({ panelRole: "pinned", side: "left" });
+			fireEvent.click(screen.getByRole("button", { name: "Unpin creature" }));
+			expect(props.onUnpin).toHaveBeenCalledTimes(1);
+		});
+
+		it("positions pinned panel on the left side", () => {
+			renderPanel({ panelRole: "pinned", side: "left" });
+			const unpinBtn = screen.getByRole("button", {
+				name: "Unpin creature",
+			});
+			const panel = unpinBtn.closest("div.fixed") as HTMLElement;
+			expect(panel?.className).toContain("left-0");
+			expect(panel?.className).toContain("border-r");
+		});
+
+		it("positions browse panel on the right side", () => {
+			renderPanel({ panelRole: "browse", side: "right" });
+			const foldBtn = screen.getByRole("button", {
+				name: "Fold stat block panel",
+			});
+			const panel = foldBtn.closest("div.fixed") as HTMLElement;
+			expect(panel?.className).toContain("right-0");
+			expect(panel?.className).toContain("border-l");
+		});
+	});
+
+	describe("US3: Fold independence with pinned panel", () => {
+		it("pinned panel has no fold button", () => {
+			renderPanel({ panelRole: "pinned", side: "left" });
+			expect(
+				screen.queryByRole("button", { name: /fold/i }),
+			).not.toBeInTheDocument();
+		});
+
+		it("pinned panel is always expanded (no translate offset)", () => {
+			renderPanel({ panelRole: "pinned", side: "left", isFolded: false });
+			const unpinBtn = screen.getByRole("button", {
+				name: "Unpin creature",
+			});
+			const panel = unpinBtn.closest("div.fixed") as HTMLElement;
+			expect(panel?.className).toContain("translate-x-0");
+		});
+	});
+});

apps/web/src/__tests__/use-bulk-import.test.ts

@@ -0,0 +1,235 @@
+import { describe, expect, it, vi } from "vitest";
+import * as indexAdapter from "../adapters/bestiary-index-adapter.js";
+
+// We test the bulk import logic by extracting and exercising the async flow.
+// Since useBulkImport is a thin React wrapper around async logic,
+// we test the core behavior via a direct simulation.
+
+vi.mock("../adapters/bestiary-index-adapter.js", async () => {
+	const actual = await vi.importActual<
+		typeof import("../adapters/bestiary-index-adapter.js")
+	>("../adapters/bestiary-index-adapter.js");
+	return {
+		...actual,
+		getAllSourceCodes: vi.fn(),
+	};
+});
+
+const mockGetAllSourceCodes = vi.mocked(indexAdapter.getAllSourceCodes);
+
+interface BulkImportState {
+	status: "idle" | "loading" | "complete" | "partial-failure";
+	total: number;
+	completed: number;
+	failed: number;
+}
+
+/** Simulate the core bulk import logic extracted from the hook */
+async function runBulkImport(
+	baseUrl: string,
+	fetchAndCacheSource: (sourceCode: string, url: string) => Promise<void>,
+	isSourceCached: (sourceCode: string) => Promise<boolean>,
+	refreshCache: () => Promise<void>,
+): Promise<BulkImportState> {
+	const allCodes = indexAdapter.getAllSourceCodes();
+	const total = allCodes.length;
+
+	const cacheChecks = await Promise.all(
+		allCodes.map(async (code) => ({
+			code,
+			cached: await isSourceCached(code),
+		})),
+	);
+
+	const alreadyCached = cacheChecks.filter((c) => c.cached).length;
+	const uncached = cacheChecks.filter((c) => !c.cached);
+
+	if (uncached.length === 0) {
+		return { status: "complete", total, completed: total, failed: 0 };
+	}
+
+	let completed = alreadyCached;
+	let failed = 0;
+
+	await Promise.allSettled(
+		uncached.map(async ({ code }) => {
+			const url = indexAdapter.getDefaultFetchUrl(code, baseUrl);
+			try {
+				await fetchAndCacheSource(code, url);
+				completed++;
+			} catch {
+				failed++;
+			}
+		}),
+	);
+
+	await refreshCache();
+
+	return {
+		status: failed > 0 ? "partial-failure" : "complete",
+		total,
+		completed,
+		failed,
+	};
+}
+
+describe("bulk import logic", () => {
+	it("skips already-cached sources and counts them into completed", async () => {
+		mockGetAllSourceCodes.mockReturnValue(["SRC1", "SRC2", "SRC3"]);
+
+		const fetchAndCache = vi.fn().mockResolvedValue(undefined);
+		const isSourceCached = vi
+			.fn()
+			.mockImplementation((code: string) =>
+				Promise.resolve(code === "SRC1" || code === "SRC3"),
+			);
+		const refreshCache = vi.fn().mockResolvedValue(undefined);
+
+		const result = await runBulkImport(
+			"https://example.com/",
+			fetchAndCache,
+			isSourceCached,
+			refreshCache,
+		);
+
+		expect(fetchAndCache).toHaveBeenCalledTimes(1);
+		expect(fetchAndCache).toHaveBeenCalledWith(
+			"SRC2",
+			"https://example.com/bestiary-src2.json",
+		);
+		expect(result.completed).toBe(3);
+		expect(result.status).toBe("complete");
+	});
+
+	it("increments completed on successful fetch", async () => {
+		mockGetAllSourceCodes.mockReturnValue(["SRC1"]);
+
+		const fetchAndCache = vi.fn().mockResolvedValue(undefined);
+		const isSourceCached = vi.fn().mockResolvedValue(false);
+		const refreshCache = vi.fn().mockResolvedValue(undefined);
+
+		const result = await runBulkImport(
+			"https://example.com/",
+			fetchAndCache,
+			isSourceCached,
+			refreshCache,
+		);
+
+		expect(result.completed).toBe(1);
+		expect(result.failed).toBe(0);
+		expect(result.status).toBe("complete");
+	});
+
+	it("increments failed on rejected fetch", async () => {
+		mockGetAllSourceCodes.mockReturnValue(["SRC1"]);
+
+		const fetchAndCache = vi.fn().mockRejectedValue(new Error("fail"));
+		const isSourceCached = vi.fn().mockResolvedValue(false);
+		const refreshCache = vi.fn().mockResolvedValue(undefined);
+
+		const result = await runBulkImport(
+			"https://example.com/",
+			fetchAndCache,
+			isSourceCached,
+			refreshCache,
+		);
+
+		expect(result.failed).toBe(1);
+		expect(result.completed).toBe(0);
+		expect(result.status).toBe("partial-failure");
+	});
+
+	it("transitions to complete when all succeed", async () => {
+		mockGetAllSourceCodes.mockReturnValue(["A", "B"]);
+
+		const fetchAndCache = vi.fn().mockResolvedValue(undefined);
+		const isSourceCached = vi.fn().mockResolvedValue(false);
+		const refreshCache = vi.fn().mockResolvedValue(undefined);
+
+		const result = await runBulkImport(
+			"https://example.com/",
+			fetchAndCache,
+			isSourceCached,
+			refreshCache,
+		);
+
+		expect(result.status).toBe("complete");
+		expect(result.completed).toBe(2);
+		expect(result.failed).toBe(0);
+	});
+
+	it("transitions to partial-failure when any fetch fails", async () => {
+		mockGetAllSourceCodes.mockReturnValue(["A", "B"]);
+
+		const fetchAndCache = vi
+			.fn()
+			.mockResolvedValueOnce(undefined)
+			.mockRejectedValueOnce(new Error("fail"));
+		const isSourceCached = vi.fn().mockResolvedValue(false);
+		const refreshCache = vi.fn().mockResolvedValue(undefined);
+
+		const result = await runBulkImport(
+			"https://example.com/",
+			fetchAndCache,
+			isSourceCached,
+			refreshCache,
+		);
+
+		expect(result.status).toBe("partial-failure");
+		expect(result.failed).toBe(1);
+	});
+
+	it("immediately transitions to complete when all sources are cached", async () => {
+		mockGetAllSourceCodes.mockReturnValue(["A", "B", "C"]);
+
+		const fetchAndCache = vi.fn();
+		const isSourceCached = vi.fn().mockResolvedValue(true);
+		const refreshCache = vi.fn().mockResolvedValue(undefined);
+
+		const result = await runBulkImport(
+			"https://example.com/",
+			fetchAndCache,
+			isSourceCached,
+			refreshCache,
+		);
+
+		expect(result.status).toBe("complete");
+		expect(result.total).toBe(3);
+		expect(result.completed).toBe(3);
+		expect(fetchAndCache).not.toHaveBeenCalled();
+	});
+
+	it("calls refreshCache exactly once when all settle", async () => {
+		mockGetAllSourceCodes.mockReturnValue(["A", "B"]);
+
+		const fetchAndCache = vi.fn().mockResolvedValue(undefined);
+		const isSourceCached = vi.fn().mockResolvedValue(false);
+		const refreshCache = vi.fn().mockResolvedValue(undefined);
+
+		await runBulkImport(
+			"https://example.com/",
+			fetchAndCache,
+			isSourceCached,
+			refreshCache,
+		);
+
+		expect(refreshCache).toHaveBeenCalledTimes(1);
+	});
+
+	it("does not call refreshCache when all sources are already cached", async () => {
+		mockGetAllSourceCodes.mockReturnValue(["A"]);
+
+		const fetchAndCache = vi.fn();
+		const isSourceCached = vi.fn().mockResolvedValue(true);
+		const refreshCache = vi.fn().mockResolvedValue(undefined);
+
+		await runBulkImport(
+			"https://example.com/",
+			fetchAndCache,
+			isSourceCached,
+			refreshCache,
+		);
+
+		expect(refreshCache).not.toHaveBeenCalled();
+	});
+});

apps/web/src/adapters/__tests__/bestiary-adapter.test.ts

@@ -0,0 +1,333 @@
+import { beforeAll, describe, expect, it } from "vitest";
+import {
+	normalizeBestiary,
+	setSourceDisplayNames,
+} from "../bestiary-adapter.js";
+
+beforeAll(() => {
+	setSourceDisplayNames({ XMM: "MM 2024" });
+});
+
+describe("normalizeBestiary", () => {
+	it("normalizes a simple creature", () => {
+		const raw = {
+			monster: [
+				{
+					name: "Goblin Warrior",
+					source: "XMM",
+					size: ["S"],
+					type: { type: "fey", tags: ["goblinoid"] },
+					alignment: ["C", "N"],
+					ac: [15],
+					hp: { average: 10, formula: "3d6" },
+					speed: { walk: 30 },
+					str: 8,
+					dex: 15,
+					con: 10,
+					int: 10,
+					wis: 8,
+					cha: 8,
+					skill: { stealth: "+6" },
+					senses: ["Darkvision 60 ft."],
+					passive: 9,
+					languages: ["Common", "Goblin"],
+					cr: "1/4",
+					action: [
+						{
+							name: "Scimitar",
+							entries: [
+								"{@atkr m} {@hit 4}, reach 5 ft. {@h}5 ({@damage 1d6 + 2}) Slashing damage.",
+							],
+						},
+					],
+					bonus: [
+						{
+							name: "Nimble Escape",
+							entries: [
+								"The goblin takes the {@action Disengage|XPHB} or {@action Hide|XPHB} action.",
+							],
+						},
+					],
+				},
+			],
+		};
+
+		const creatures = normalizeBestiary(raw);
+		expect(creatures).toHaveLength(1);
+
+		const c = creatures[0];
+		expect(c.id).toBe("xmm:goblin-warrior");
+		expect(c.name).toBe("Goblin Warrior");
+		expect(c.source).toBe("XMM");
+		expect(c.sourceDisplayName).toBe("MM 2024");
+		expect(c.size).toBe("Small");
+		expect(c.type).toBe("Fey (Goblinoid)");
+		expect(c.alignment).toBe("Chaotic Neutral");
+		expect(c.ac).toBe(15);
+		expect(c.hp).toEqual({ average: 10, formula: "3d6" });
+		expect(c.speed).toBe("30 ft.");
+		expect(c.abilities.dex).toBe(15);
+		expect(c.cr).toBe("1/4");
+		expect(c.proficiencyBonus).toBe(2);
+		expect(c.passive).toBe(9);
+		expect(c.skills).toBe("Stealth +6");
+		expect(c.senses).toBe("Darkvision 60 ft.");
+		expect(c.languages).toBe("Common, Goblin");
+		expect(c.actions).toHaveLength(1);
+		expect(c.actions?.[0].text).toContain("Melee Attack Roll:");
+		expect(c.actions?.[0].text).not.toContain("{@");
+		expect(c.bonusActions).toHaveLength(1);
+		expect(c.bonusActions?.[0].text).toContain("Disengage");
+		expect(c.bonusActions?.[0].text).not.toContain("{@");
+	});
+
+	it("normalizes a creature with legendary actions", () => {
+		const raw = {
+			monster: [
+				{
+					name: "Aboleth",
+					source: "XMM",
+					size: ["L"],
+					type: "aberration",
+					alignment: ["L", "E"],
+					ac: [17],
+					hp: { average: 135, formula: "18d10 + 36" },
+					speed: { walk: 10, swim: 40 },
+					str: 21,
+					dex: 9,
+					con: 15,
+					int: 18,
+					wis: 15,
+					cha: 18,
+					save: { con: "+6", int: "+8", wis: "+6" },
+					senses: ["Darkvision 120 ft."],
+					passive: 12,
+					languages: ["Deep Speech", "Telepathy 120 ft."],
+					cr: "10",
+					legendary: [
+						{
+							name: "Lash",
+							entries: ["The aboleth makes one Tentacle attack."],
+						},
+					],
+				},
+			],
+		};
+
+		const creatures = normalizeBestiary(raw);
+		const c = creatures[0];
+		expect(c.legendaryActions).toBeDefined();
+		expect(c.legendaryActions?.preamble).toContain("3 Legendary Actions");
+		expect(c.legendaryActions?.entries).toHaveLength(1);
+		expect(c.legendaryActions?.entries[0].name).toBe("Lash");
+	});
+
+	it("normalizes a creature with spellcasting", () => {
+		const raw = {
+			monster: [
+				{
+					name: "Test Caster",
+					source: "XMM",
+					size: ["M"],
+					type: "humanoid",
+					ac: [12],
+					hp: { average: 40, formula: "9d8" },
+					speed: { walk: 30 },
+					str: 10,
+					dex: 14,
+					con: 10,
+					int: 17,
+					wis: 12,
+					cha: 11,
+					passive: 11,
+					cr: "6",
+					spellcasting: [
+						{
+							name: "Spellcasting",
+							headerEntries: [
+								"The caster casts spells using Intelligence (spell save {@dc 15}):",
+							],
+							will: ["{@spell Detect Magic|XPHB}", "{@spell Mage Hand|XPHB}"],
+							daily: {
+								"2e": ["{@spell Fireball|XPHB}"],
+								"1": ["{@spell Dimension Door|XPHB}"],
+							},
+						},
+					],
+				},
+			],
+		};
+
+		const creatures = normalizeBestiary(raw);
+		const c = creatures[0];
+		expect(c.spellcasting).toHaveLength(1);
+		const sc = c.spellcasting?.[0];
+		expect(sc).toBeDefined();
+		expect(sc?.name).toBe("Spellcasting");
+		expect(sc?.headerText).toContain("DC 15");
+		expect(sc?.headerText).not.toContain("{@");
+		expect(sc?.atWill).toEqual(["Detect Magic", "Mage Hand"]);
+		expect(sc?.daily).toHaveLength(2);
+		expect(sc?.daily).toContainEqual({
+			uses: 2,
+			each: true,
+			spells: ["Fireball"],
+		});
+		expect(sc?.daily).toContainEqual({
+			uses: 1,
+			each: false,
+			spells: ["Dimension Door"],
+		});
+	});
+
+	it("normalizes a creature with object-type type field", () => {
+		const raw = {
+			monster: [
+				{
+					name: "Swarm of Bats",
+					source: "XMM",
+					size: ["L"],
+					type: { type: "beast", swarmSize: "T" },
+					ac: [12],
+					hp: { average: 11, formula: "2d10" },
+					speed: { walk: 5, fly: 30 },
+					str: 5,
+					dex: 15,
+					con: 10,
+					int: 2,
+					wis: 12,
+					cha: 4,
+					passive: 11,
+					resist: ["bludgeoning", "piercing", "slashing"],
+					conditionImmune: ["charmed", "frightened"],
+					cr: "1/4",
+				},
+			],
+		};
+
+		const creatures = normalizeBestiary(raw);
+		const c = creatures[0];
+		expect(c.type).toBe("Swarm of Tiny Beasts");
+		expect(c.resist).toBe("Bludgeoning, Piercing, Slashing");
+		expect(c.conditionImmune).toBe("Charmed, Frightened");
+	});
+
+	it("normalizes a creature with conditional resistances", () => {
+		const raw = {
+			monster: [
+				{
+					name: "Half-Dragon",
+					source: "XMM",
+					size: ["M"],
+					type: "humanoid",
+					ac: [18],
+					hp: { average: 65, formula: "10d8 + 20" },
+					speed: { walk: 30 },
+					str: 16,
+					dex: 13,
+					con: 14,
+					int: 10,
+					wis: 11,
+					cha: 10,
+					passive: 10,
+					cr: "5",
+					resist: [
+						{
+							special: "Damage type chosen for the Draconic Origin trait",
+						},
+					],
+				},
+			],
+		};
+
+		const creatures = normalizeBestiary(raw);
+		const c = creatures[0];
+		expect(c.resist).toBe("Damage type chosen for the Draconic Origin trait");
+	});
+
+	it("normalizes a creature with multiple sizes", () => {
+		const raw = {
+			monster: [
+				{
+					name: "Aberrant Cultist",
+					source: "XMM",
+					size: ["S", "M"],
+					type: "humanoid",
+					ac: [13],
+					hp: { average: 22, formula: "4d8 + 4" },
+					speed: { walk: 30 },
+					str: 11,
+					dex: 14,
+					con: 12,
+					int: 10,
+					wis: 13,
+					cha: 8,
+					passive: 11,
+					cr: "1/2",
+				},
+			],
+		};
+
+		const creatures = normalizeBestiary(raw);
+		expect(creatures[0].size).toBe("Small or Medium");
+	});
+
+	it("normalizes a creature with CR as object", () => {
+		const raw = {
+			monster: [
+				{
+					name: "Dragon",
+					source: "XMM",
+					size: ["H"],
+					type: "dragon",
+					ac: [19],
+					hp: { average: 256, formula: "19d12 + 133" },
+					speed: { walk: 40 },
+					str: 27,
+					dex: 10,
+					con: 25,
+					int: 16,
+					wis: 13,
+					cha: 23,
+					passive: 23,
+					cr: { cr: "17", xpLair: 20000 },
+				},
+			],
+		};
+
+		const creatures = normalizeBestiary(raw);
+		expect(creatures[0].cr).toBe("17");
+		expect(creatures[0].proficiencyBonus).toBe(6);
+	});
+
+	it("handles fly speed with hover condition", () => {
+		const raw = {
+			monster: [
+				{
+					name: "Air Elemental",
+					source: "XMM",
+					size: ["L"],
+					type: "elemental",
+					ac: [15],
+					hp: { average: 90, formula: "12d10 + 24" },
+					speed: {
+						walk: 10,
+						fly: { number: 90, condition: "(hover)" },
+						canHover: true,
+					},
+					str: 14,
+					dex: 20,
+					con: 14,
+					int: 6,
+					wis: 10,
+					cha: 6,
+					passive: 10,
+					cr: "5",
+				},
+			],
+		};
+
+		const creatures = normalizeBestiary(raw);
+		expect(creatures[0].speed).toBe("10 ft., fly 90 ft. (hover)");
+	});
+});

apps/web/src/adapters/__tests__/strip-tags.test.ts

@@ -0,0 +1,138 @@
+import { describe, expect, it } from "vitest";
+import { stripTags } from "../strip-tags.js";
+
+describe("stripTags", () => {
+	it("returns text unchanged when no tags present", () => {
+		expect(stripTags("Hello world")).toBe("Hello world");
+	});
+
+	it("strips {@spell Name|Source} to Name", () => {
+		expect(stripTags("{@spell Fireball|XPHB}")).toBe("Fireball");
+	});
+
+	it("strips {@condition Name|Source} to Name", () => {
+		expect(stripTags("{@condition Frightened|XPHB}")).toBe("Frightened");
+	});
+
+	it("strips {@damage dice} to dice", () => {
+		expect(stripTags("{@damage 2d10}")).toBe("2d10");
+	});
+
+	it("strips {@dice value} to value", () => {
+		expect(stripTags("{@dice 5d10}")).toBe("5d10");
+	});
+
+	it("strips {@dc N} to DC N", () => {
+		expect(stripTags("{@dc 15}")).toBe("DC 15");
+	});
+
+	it("strips {@hit N} to +N", () => {
+		expect(stripTags("{@hit 5}")).toBe("+5");
+	});
+
+	it("strips {@h} to Hit: ", () => {
+		expect(stripTags("{@h}")).toBe("Hit: ");
+	});
+
+	it("strips {@hom} to Hit or Miss: ", () => {
+		expect(stripTags("{@hom}")).toBe("Hit or Miss: ");
+	});
+
+	it("strips {@atkr m} to Melee Attack Roll:", () => {
+		expect(stripTags("{@atkr m}")).toBe("Melee Attack Roll:");
+	});
+
+	it("strips {@atkr r} to Ranged Attack Roll:", () => {
+		expect(stripTags("{@atkr r}")).toBe("Ranged Attack Roll:");
+	});
+
+	it("strips {@atkr m,r} to Melee or Ranged Attack Roll:", () => {
+		expect(stripTags("{@atkr m,r}")).toBe("Melee or Ranged Attack Roll:");
+	});
+
+	it("strips {@recharge 5} to (Recharge 5-6)", () => {
+		expect(stripTags("{@recharge 5}")).toBe("(Recharge 5-6)");
+	});
+
+	it("strips {@recharge} to (Recharge 6)", () => {
+		expect(stripTags("{@recharge}")).toBe("(Recharge 6)");
+	});
+
+	it("strips {@actSave wis} to Wisdom saving throw", () => {
+		expect(stripTags("{@actSave wis}")).toBe("Wisdom saving throw");
+	});
+
+	it("strips {@actSaveFail} to Failure:", () => {
+		expect(stripTags("{@actSaveFail}")).toBe("Failure:");
+	});
+
+	it("strips {@actSaveFail 2} to Failure by 2 or More:", () => {
+		expect(stripTags("{@actSaveFail 2}")).toBe("Failure by 2 or More:");
+	});
+
+	it("strips {@actSaveSuccess} to Success:", () => {
+		expect(stripTags("{@actSaveSuccess}")).toBe("Success:");
+	});
+
+	it("strips {@actTrigger} to Trigger:", () => {
+		expect(stripTags("{@actTrigger}")).toBe("Trigger:");
+	});
+
+	it("strips {@actResponse} to Response:", () => {
+		expect(stripTags("{@actResponse}")).toBe("Response:");
+	});
+
+	it("strips {@variantrule Name|Source|Display} to Display", () => {
+		expect(stripTags("{@variantrule Cone [Area of Effect]|XPHB|Cone}")).toBe(
+			"Cone",
+		);
+	});
+
+	it("strips {@action Name|Source|Display} to Display", () => {
+		expect(stripTags("{@action Disengage|XPHB|Disengage}")).toBe("Disengage");
+	});
+
+	it("strips {@skill Name|Source} to Name", () => {
+		expect(stripTags("{@skill Perception|XPHB}")).toBe("Perception");
+	});
+
+	it("strips {@creature Name|Source} to Name", () => {
+		expect(stripTags("{@creature Goblin|XPHB}")).toBe("Goblin");
+	});
+
+	it("strips {@hazard Name|Source} to Name", () => {
+		expect(stripTags("{@hazard Lava|XPHB}")).toBe("Lava");
+	});
+
+	it("strips {@status Name|Source} to Name", () => {
+		expect(stripTags("{@status Bloodied|XPHB}")).toBe("Bloodied");
+	});
+
+	it("handles unknown tags by extracting first segment", () => {
+		expect(stripTags("{@unknown Something|else}")).toBe("Something");
+	});
+
+	it("handles multiple tags in the same string", () => {
+		expect(stripTags("{@hit 4}, reach 5 ft. {@h}5 ({@damage 1d6 + 2})")).toBe(
+			"+4, reach 5 ft. Hit: 5 (1d6 + 2)",
+		);
+	});
+
+	it("handles nested tags gracefully", () => {
+		expect(
+			stripTags("The spell {@spell Fireball|XPHB} deals {@damage 8d6}."),
+		).toBe("The spell Fireball deals 8d6.");
+	});
+
+	it("handles text with no tags", () => {
+		expect(stripTags("Just plain text.")).toBe("Just plain text.");
+	});
+
+	it("strips {@actSaveSuccessOrFail} to Success or Failure:", () => {
+		expect(stripTags("{@actSaveSuccessOrFail}")).toBe("Success or Failure:");
+	});
+
+	it("strips {@action Name|Source} to Name when no display text", () => {
+		expect(stripTags("{@action Disengage|XPHB}")).toBe("Disengage");
+	});
+});

apps/web/src/adapters/bestiary-adapter.ts

@@ -0,0 +1,460 @@
+import type {
+	Creature,
+	CreatureId,
+	DailySpells,
+	LegendaryBlock,
+	SpellcastingBlock,
+	TraitBlock,
+} from "@initiative/domain";
+import { creatureId, proficiencyBonus } from "@initiative/domain";
+import { stripTags } from "./strip-tags.js";
+
+// --- Raw 5etools types (minimal, for parsing) ---
+
+interface RawMonster {
+	name: string;
+	source: string;
+	size: string[];
+	type: string | { type: string; tags?: string[]; swarmSize?: string };
+	alignment?: string[];
+	ac: (number | { ac: number; from?: string[] } | { special: string })[];
+	hp: { average?: number; formula?: string; special?: string };
+	speed: Record<
+		string,
+		number | { number: number; condition?: string } | boolean
+	>;
+	str: number;
+	dex: number;
+	con: number;
+	int: number;
+	wis: number;
+	cha: number;
+	save?: Record<string, string>;
+	skill?: Record<string, string>;
+	senses?: string[];
+	passive: number;
+	resist?: (string | { special: string })[];
+	immune?: (string | { special: string })[];
+	vulnerable?: (string | { special: string })[];
+	conditionImmune?: string[];
+	languages?: string[];
+	cr?: string | { cr: string };
+	trait?: RawEntry[];
+	action?: RawEntry[];
+	bonus?: RawEntry[];
+	reaction?: RawEntry[];
+	legendary?: RawEntry[];
+	legendaryActions?: number;
+	legendaryActionsLair?: number;
+	legendaryHeader?: string[];
+	spellcasting?: RawSpellcasting[];
+	initiative?: { proficiency?: number };
+}
+
+interface RawEntry {
+	name: string;
+	entries: (string | RawEntryObject)[];
+}
+
+interface RawEntryObject {
+	type: string;
+	items?: (
+		| string
+		| { type: string; name?: string; entries?: (string | RawEntryObject)[] }
+	)[];
+	style?: string;
+	name?: string;
+	entries?: (string | RawEntryObject)[];
+}
+
+interface RawSpellcasting {
+	name: string;
+	headerEntries: string[];
+	will?: string[];
+	daily?: Record<string, string[]>;
+	rest?: Record<string, string[]>;
+	hidden?: string[];
+	ability?: string;
+	displayAs?: string;
+	legendary?: Record<string, string[]>;
+}
+
+// --- Source mapping ---
+
+let sourceDisplayNames: Record<string, string> = {};
+
+export function setSourceDisplayNames(names: Record<string, string>): void {
+	sourceDisplayNames = names;
+}
+
+// --- Size mapping ---
+
+const SIZE_MAP: Record<string, string> = {
+	T: "Tiny",
+	S: "Small",
+	M: "Medium",
+	L: "Large",
+	H: "Huge",
+	G: "Gargantuan",
+};
+
+// --- Alignment mapping ---
+
+const ALIGNMENT_MAP: Record<string, string> = {
+	L: "Lawful",
+	N: "Neutral",
+	C: "Chaotic",
+	G: "Good",
+	E: "Evil",
+	U: "Unaligned",
+};
+
+function formatAlignment(codes?: string[]): string {
+	if (!codes || codes.length === 0) return "Unaligned";
+	if (codes.length === 1 && codes[0] === "U") return "Unaligned";
+	if (codes.length === 1 && codes[0] === "N") return "Neutral";
+	return codes.map((c) => ALIGNMENT_MAP[c] ?? c).join(" ");
+}
+
+// --- Helpers ---
+
+function formatSize(sizes: string[]): string {
+	return sizes.map((s) => SIZE_MAP[s] ?? s).join(" or ");
+}
+
+function formatType(
+	type:
+		| string
+		| {
+				type: string | { choose: string[] };
+				tags?: string[];
+				swarmSize?: string;
+		  },
+): string {
+	if (typeof type === "string") return capitalize(type);
+
+	const baseType =
+		typeof type.type === "string"
+			? capitalize(type.type)
+			: type.type.choose.map(capitalize).join(" or ");
+
+	let result = baseType;
+	if (type.tags && type.tags.length > 0) {
+		const tagStrs = type.tags
+			.filter((t): t is string => typeof t === "string")
+			.map(capitalize);
+		if (tagStrs.length > 0) {
+			result += ` (${tagStrs.join(", ")})`;
+		}
+	}
+	if (type.swarmSize) {
+		const swarmSizeLabel = SIZE_MAP[type.swarmSize] ?? type.swarmSize;
+		result = `Swarm of ${swarmSizeLabel} ${result}s`;
+	}
+	return result;
+}
+
+function capitalize(s: string): string {
+	return s.charAt(0).toUpperCase() + s.slice(1);
+}
+
+function extractAc(ac: RawMonster["ac"]): {
+	value: number;
+	source?: string;
+} {
+	const first = ac[0];
+	if (typeof first === "number") {
+		return { value: first };
+	}
+	if ("special" in first) {
+		// Variable AC (e.g. spell summons) — parse leading number if possible
+		const match = first.special.match(/^(\d+)/);
+		return {
+			value: match ? Number(match[1]) : 0,
+			source: first.special,
+		};
+	}
+	return {
+		value: first.ac,
+		source: first.from ? stripTags(first.from.join(", ")) : undefined,
+	};
+}
+
+function formatSpeed(speed: RawMonster["speed"]): string {
+	const parts: string[] = [];
+	for (const [mode, value] of Object.entries(speed)) {
+		if (mode === "canHover") continue;
+		if (typeof value === "boolean") continue;
+
+		let numStr: string;
+		let condition = "";
+		if (typeof value === "number") {
+			numStr = `${value} ft.`;
+		} else {
+			numStr = `${value.number} ft.`;
+			if (value.condition) {
+				condition = ` ${value.condition}`;
+			}
+		}
+
+		if (mode === "walk") {
+			parts.push(`${numStr}${condition}`);
+		} else {
+			parts.push(`${mode} ${numStr}${condition}`);
+		}
+	}
+	return parts.join(", ");
+}
+
+function formatSaves(save?: Record<string, string>): string | undefined {
+	if (!save) return undefined;
+	return Object.entries(save)
+		.map(([key, val]) => `${key.toUpperCase()} ${val}`)
+		.join(", ");
+}
+
+function formatSkills(skill?: Record<string, string>): string | undefined {
+	if (!skill) return undefined;
+	return Object.entries(skill)
+		.map(([key, val]) => `${capitalize(key)} ${val}`)
+		.join(", ");
+}
+
+function formatDamageList(
+	items?: (string | Record<string, unknown>)[],
+): string | undefined {
+	if (!items || items.length === 0) return undefined;
+	return items
+		.map((item) => {
+			if (typeof item === "string") return capitalize(stripTags(item));
+			if (typeof item.special === "string") return stripTags(item.special);
+			// Handle conditional entries like { vulnerable: [...], note: "..." }
+			const damageTypes = (Object.values(item).find((v) => Array.isArray(v)) ??
+				[]) as string[];
+			const note = typeof item.note === "string" ? ` ${item.note}` : "";
+			return damageTypes.map((d) => capitalize(stripTags(d))).join(", ") + note;
+		})
+		.join(", ");
+}
+
+function formatConditionImmunities(
+	items?: (string | { conditionImmune?: string[]; note?: string })[],
+): string | undefined {
+	if (!items || items.length === 0) return undefined;
+	return items
+		.flatMap((c) => {
+			if (typeof c === "string") return [capitalize(stripTags(c))];
+			if (c.conditionImmune) {
+				const conds = c.conditionImmune.map((ci) => capitalize(stripTags(ci)));
+				const note = c.note ? ` ${c.note}` : "";
+				return conds.map((ci) => `${ci}${note}`);
+			}
+			return [];
+		})
+		.join(", ");
+}
+
+function renderListItem(item: string | RawEntryObject): string | undefined {
+	if (typeof item === "string") {
+		return `• ${stripTags(item)}`;
+	}
+	if (item.name && item.entries) {
+		return `• ${stripTags(item.name)}: ${renderEntries(item.entries)}`;
+	}
+	return undefined;
+}
+
+function renderEntryObject(entry: RawEntryObject, parts: string[]): void {
+	if (entry.type === "list") {
+		for (const item of entry.items ?? []) {
+			const rendered = renderListItem(item);
+			if (rendered) parts.push(rendered);
+		}
+	} else if (entry.type === "item" && entry.name && entry.entries) {
+		parts.push(`${stripTags(entry.name)}: ${renderEntries(entry.entries)}`);
+	} else if (entry.entries) {
+		parts.push(renderEntries(entry.entries));
+	}
+}
+
+function renderEntries(entries: (string | RawEntryObject)[]): string {
+	const parts: string[] = [];
+	for (const entry of entries) {
+		if (typeof entry === "string") {
+			parts.push(stripTags(entry));
+		} else {
+			renderEntryObject(entry, parts);
+		}
+	}
+	return parts.join(" ");
+}
+
+function normalizeTraits(raw?: RawEntry[]): TraitBlock[] | undefined {
+	if (!raw || raw.length === 0) return undefined;
+	return raw.map((t) => ({
+		name: stripTags(t.name),
+		text: renderEntries(t.entries),
+	}));
+}
+
+function normalizeSpellcasting(
+	raw?: RawSpellcasting[],
+): SpellcastingBlock[] | undefined {
+	if (!raw || raw.length === 0) return undefined;
+
+	return raw.map((sc) => {
+		const block: {
+			name: string;
+			headerText: string;
+			atWill?: string[];
+			daily?: DailySpells[];
+			restLong?: DailySpells[];
+		} = {
+			name: stripTags(sc.name),
+			headerText: sc.headerEntries.map((e) => stripTags(e)).join(" "),
+		};
+
+		const hidden = new Set(sc.hidden ?? []);
+
+		if (sc.will && !hidden.has("will")) {
+			block.atWill = sc.will.map((s) => stripTags(s));
+		}
+
+		if (sc.daily) {
+			block.daily = parseDailyMap(sc.daily);
+		}
+
+		if (sc.rest) {
+			block.restLong = parseDailyMap(sc.rest);
+		}
+
+		return block;
+	});
+}
+
+function parseDailyMap(map: Record<string, string[]>): DailySpells[] {
+	return Object.entries(map).map(([key, spells]) => {
+		const each = key.endsWith("e");
+		const uses = Number.parseInt(each ? key.slice(0, -1) : key, 10);
+		return {
+			uses,
+			each,
+			spells: spells.map((s) => stripTags(s)),
+		};
+	});
+}
+
+function normalizeLegendary(
+	raw?: RawEntry[],
+	monster?: RawMonster,
+): LegendaryBlock | undefined {
+	if (!raw || raw.length === 0) return undefined;
+
+	const name = monster?.name ?? "creature";
+	const count = monster?.legendaryActions ?? 3;
+	const preamble = `${name} can take ${count} Legendary Actions, choosing from the options below. Only one Legendary Action can be used at a time and only at the end of another creature's turn. ${name} regains spent Legendary Actions at the start of its turn.`;
+
+	return {
+		preamble,
+		entries: raw.map((e) => ({
+			name: stripTags(e.name),
+			text: renderEntries(e.entries),
+		})),
+	};
+}
+
+function extractCr(cr: string | { cr: string } | undefined): string {
+	if (cr === undefined) return "—";
+	return typeof cr === "string" ? cr : cr.cr;
+}
+
+function makeCreatureId(source: string, name: string): CreatureId {
+	const slug = name
+		.toLowerCase()
+		.replace(/[^a-z0-9]+/g, "-")
+		.replace(/(^-|-$)/g, "");
+	return creatureId(`${source.toLowerCase()}:${slug}`);
+}
+
+/**
+ * Normalizes raw 5etools bestiary JSON into domain Creature[].
+ */
+export function normalizeBestiary(raw: { monster: RawMonster[] }): Creature[] {
+	// Filter out _copy entries (reference another source's monster) and
+	// monsters missing required fields (ac, hp, size, type)
+	const monsters = raw.monster.filter((m) => {
+		// biome-ignore lint/suspicious/noExplicitAny: raw JSON may have _copy field
+		if ((m as any)._copy) return false;
+		return (
+			Array.isArray(m.ac) &&
+			m.ac.length > 0 &&
+			m.hp !== undefined &&
+			Array.isArray(m.size) &&
+			m.size.length > 0 &&
+			m.type !== undefined
+		);
+	});
+	const creatures: Creature[] = [];
+	for (const m of monsters) {
+		try {
+			creatures.push(normalizeMonster(m));
+		} catch {
+			// Skip monsters with unexpected data shapes
+		}
+	}
+	return creatures;
+}
+
+function normalizeMonster(m: RawMonster): Creature {
+	const crStr = extractCr(m.cr);
+	const ac = extractAc(m.ac);
+
+	return {
+		id: makeCreatureId(m.source, m.name),
+		name: m.name,
+		source: m.source,
+		sourceDisplayName: sourceDisplayNames[m.source] ?? m.source,
+		size: formatSize(m.size),
+		type: formatType(m.type),
+		alignment: formatAlignment(m.alignment),
+		ac: ac.value,
+		acSource: ac.source,
+		hp: {
+			average: m.hp.average ?? 0,
+			formula: m.hp.formula ?? m.hp.special ?? "",
+		},
+		speed: formatSpeed(m.speed),
+		abilities: {
+			str: m.str,
+			dex: m.dex,
+			con: m.con,
+			int: m.int,
+			wis: m.wis,
+			cha: m.cha,
+		},
+		cr: crStr,
+		initiativeProficiency: m.initiative?.proficiency ?? 0,
+		proficiencyBonus: proficiencyBonus(crStr),
+		passive: m.passive,
+		savingThrows: formatSaves(m.save),
+		skills: formatSkills(m.skill),
+		resist: formatDamageList(m.resist),
+		immune: formatDamageList(m.immune),
+		vulnerable: formatDamageList(m.vulnerable),
+		conditionImmune: formatConditionImmunities(m.conditionImmune),
+		senses:
+			m.senses && m.senses.length > 0
+				? m.senses.map((s) => stripTags(s)).join(", ")
+				: undefined,
+		languages:
+			m.languages && m.languages.length > 0
+				? m.languages.join(", ")
+				: undefined,
+		traits: normalizeTraits(m.trait),
+		actions: normalizeTraits(m.action),
+		bonusActions: normalizeTraits(m.bonus),
+		reactions: normalizeTraits(m.reaction),
+		legendaryActions: normalizeLegendary(m.legendary, m),
+		spellcasting: normalizeSpellcasting(m.spellcasting),
+	};
+}

apps/web/src/adapters/bestiary-cache.ts

@@ -0,0 +1,139 @@
+import type { Creature, CreatureId } from "@initiative/domain";
+import { type IDBPDatabase, openDB } from "idb";
+
+const DB_NAME = "initiative-bestiary";
+const STORE_NAME = "sources";
+const DB_VERSION = 1;
+
+export interface CachedSourceInfo {
+	readonly sourceCode: string;
+	readonly displayName: string;
+	readonly creatureCount: number;
+	readonly cachedAt: number;
+}
+
+interface CachedSourceRecord {
+	sourceCode: string;
+	displayName: string;
+	creatures: Creature[];
+	cachedAt: number;
+	creatureCount: number;
+}
+
+let db: IDBPDatabase | null = null;
+let dbFailed = false;
+
+// In-memory fallback when IndexedDB is unavailable
+const memoryStore = new Map<string, CachedSourceRecord>();
+
+async function getDb(): Promise<IDBPDatabase | null> {
+	if (db) return db;
+	if (dbFailed) return null;
+
+	try {
+		db = await openDB(DB_NAME, DB_VERSION, {
+			upgrade(database) {
+				if (!database.objectStoreNames.contains(STORE_NAME)) {
+					database.createObjectStore(STORE_NAME, {
+						keyPath: "sourceCode",
+					});
+				}
+			},
+		});
+		return db;
+	} catch {
+		dbFailed = true;
+		console.warn(
+			"IndexedDB unavailable — bestiary cache will not persist across sessions.",
+		);
+		return null;
+	}
+}
+
+export async function cacheSource(
+	sourceCode: string,
+	displayName: string,
+	creatures: Creature[],
+): Promise<void> {
+	const record: CachedSourceRecord = {
+		sourceCode,
+		displayName,
+		creatures,
+		cachedAt: Date.now(),
+		creatureCount: creatures.length,
+	};
+
+	const database = await getDb();
+	if (database) {
+		await database.put(STORE_NAME, record);
+	} else {
+		memoryStore.set(sourceCode, record);
+	}
+}
+
+export async function isSourceCached(sourceCode: string): Promise<boolean> {
+	const database = await getDb();
+	if (database) {
+		const record = await database.get(STORE_NAME, sourceCode);
+		return record !== undefined;
+	}
+	return memoryStore.has(sourceCode);
+}
+
+export async function getCachedSources(): Promise<CachedSourceInfo[]> {
+	const database = await getDb();
+	if (database) {
+		const all: CachedSourceRecord[] = await database.getAll(STORE_NAME);
+		return all.map((r) => ({
+			sourceCode: r.sourceCode,
+			displayName: r.displayName,
+			creatureCount: r.creatureCount,
+			cachedAt: r.cachedAt,
+		}));
+	}
+	return [...memoryStore.values()].map((r) => ({
+		sourceCode: r.sourceCode,
+		displayName: r.displayName,
+		creatureCount: r.creatureCount,
+		cachedAt: r.cachedAt,
+	}));
+}
+
+export async function clearSource(sourceCode: string): Promise<void> {
+	const database = await getDb();
+	if (database) {
+		await database.delete(STORE_NAME, sourceCode);
+	} else {
+		memoryStore.delete(sourceCode);
+	}
+}
+
+export async function clearAll(): Promise<void> {
+	const database = await getDb();
+	if (database) {
+		await database.clear(STORE_NAME);
+	} else {
+		memoryStore.clear();
+	}
+}
+
+export async function loadAllCachedCreatures(): Promise<
+	Map<CreatureId, Creature>
+> {
+	const map = new Map<CreatureId, Creature>();
+	const database = await getDb();
+
+	let records: CachedSourceRecord[];
+	if (database) {
+		records = await database.getAll(STORE_NAME);
+	} else {
+		records = [...memoryStore.values()];
+	}
+
+	for (const record of records) {
+		for (const creature of record.creatures) {
+			map.set(creature.id, creature);
+		}
+	}
+	return map;
+}

apps/web/src/adapters/bestiary-index-adapter.ts

@@ -0,0 +1,96 @@
+import type { BestiaryIndex, BestiaryIndexEntry } from "@initiative/domain";
+
+import rawIndex from "../../../../data/bestiary/index.json";
+
+interface CompactCreature {
+	readonly n: string;
+	readonly s: string;
+	readonly ac: number;
+	readonly hp: number;
+	readonly dx: number;
+	readonly cr: string;
+	readonly ip: number;
+	readonly sz: string;
+	readonly tp: string;
+}
+
+interface CompactIndex {
+	readonly sources: Record<string, string>;
+	readonly creatures: readonly CompactCreature[];
+}
+
+function mapCreature(c: CompactCreature): BestiaryIndexEntry {
+	return {
+		name: c.n,
+		source: c.s,
+		ac: c.ac,
+		hp: c.hp,
+		dex: c.dx,
+		cr: c.cr,
+		initiativeProficiency: c.ip,
+		size: c.sz,
+		type: c.tp,
+	};
+}
+
+// Source codes whose filename on the remote differs from a simple lowercase.
+// Plane Shift sources use a hyphen: PSA -> ps-a, etc.
+const FILENAME_OVERRIDES: Record<string, string> = {
+	PSA: "ps-a",
+	PSD: "ps-d",
+	PSI: "ps-i",
+	PSK: "ps-k",
+	PSX: "ps-x",
+	PSZ: "ps-z",
+};
+
+// Source codes with no corresponding remote bestiary file.
+// Excluded from the index entirely so creatures aren't searchable
+// without a fetchable source.
+const EXCLUDED_SOURCES = new Set<string>([]);
+
+let cachedIndex: BestiaryIndex | undefined;
+
+export function loadBestiaryIndex(): BestiaryIndex {
+	if (cachedIndex) return cachedIndex;
+
+	const compact = rawIndex as unknown as CompactIndex;
+	const sources = Object.fromEntries(
+		Object.entries(compact.sources).filter(
+			([code]) => !EXCLUDED_SOURCES.has(code),
+		),
+	);
+	cachedIndex = {
+		sources,
+		creatures: compact.creatures
+			.filter((c) => !EXCLUDED_SOURCES.has(c.s))
+			.map(mapCreature),
+	};
+	return cachedIndex;
+}
+
+export function getAllSourceCodes(): string[] {
+	const index = loadBestiaryIndex();
+	return Object.keys(index.sources).filter((c) => !EXCLUDED_SOURCES.has(c));
+}
+
+function sourceCodeToFilename(sourceCode: string): string {
+	return FILENAME_OVERRIDES[sourceCode] ?? sourceCode.toLowerCase();
+}
+
+export function getDefaultFetchUrl(
+	sourceCode: string,
+	baseUrl?: string,
+): string {
+	const filename = `bestiary-${sourceCodeToFilename(sourceCode)}.json`;
+	if (baseUrl !== undefined) {
+		const normalized = baseUrl.endsWith("/") ? baseUrl : `${baseUrl}/`;
+		return `${normalized}${filename}`;
+	}
+	return `https://raw.githubusercontent.com/5etools-mirror-3/5etools-src/main/data/bestiary/${filename}`;
+}
+
+export function getSourceDisplayName(sourceCode: string): string {
+	const index = loadBestiaryIndex();
+	return index.sources[sourceCode] ?? sourceCode;
+}

apps/web/src/adapters/strip-tags.ts

@@ -0,0 +1,100 @@
+const ABILITY_MAP: Record<string, string> = {
+	str: "Strength",
+	dex: "Dexterity",
+	con: "Constitution",
+	int: "Intelligence",
+	wis: "Wisdom",
+	cha: "Charisma",
+};
+
+const ATKR_MAP: Record<string, string> = {
+	m: "Melee Attack Roll:",
+	r: "Ranged Attack Roll:",
+	"m,r": "Melee or Ranged Attack Roll:",
+	"r,m": "Melee or Ranged Attack Roll:",
+};
+
+/**
+ * Strips 5etools {@tag ...} markup from text, converting to plain readable text.
+ *
+ * Handles 15+ tag types per research.md R-002 tag resolution rules.
+ */
+export function stripTags(text: string): string {
+	if (typeof text !== "string") return String(text);
+	// Process special tags with specific output formats first
+	let result = text;
+
+	// {@h} → "Hit: "
+	result = result.replace(/\{@h\}/g, "Hit: ");
+
+	// {@hom} → "Hit or Miss: "
+	result = result.replace(/\{@hom\}/g, "Hit or Miss: ");
+
+	// {@actTrigger} → "Trigger:"
+	result = result.replace(/\{@actTrigger\}/g, "Trigger:");
+
+	// {@actResponse} → "Response:"
+	result = result.replace(/\{@actResponse\}/g, "Response:");
+
+	// {@actSaveSuccess} → "Success:"
+	result = result.replace(/\{@actSaveSuccess\}/g, "Success:");
+
+	// {@actSaveSuccessOrFail} → handled below as parameterized
+
+	// {@recharge 5} → "(Recharge 5-6)", {@recharge} → "(Recharge 6)"
+	result = result.replace(/\{@recharge\s+(\d)\}/g, "(Recharge $1-6)");
+	result = result.replace(/\{@recharge\}/g, "(Recharge 6)");
+
+	// {@dc N} → "DC N"
+	result = result.replace(/\{@dc\s+(\d+)\}/g, "DC $1");
+
+	// {@hit N} → "+N"
+	result = result.replace(/\{@hit\s+(\d+)\}/g, "+$1");
+
+	// {@atkr type} → mapped attack roll text
+	result = result.replace(/\{@atkr\s+([^}]+)\}/g, (_, type: string) => {
+		return ATKR_MAP[type.trim()] ?? `Attack Roll:`;
+	});
+
+	// {@actSave ability} → "Ability saving throw"
+	result = result.replace(/\{@actSave\s+([^}]+)\}/g, (_, ability: string) => {
+		const name = ABILITY_MAP[ability.trim().toLowerCase()];
+		return name ? `${name} saving throw` : `${ability} saving throw`;
+	});
+
+	// {@actSaveFail} → "Failure:" or {@actSaveFail N} → "Failure by N or More:"
+	result = result.replace(
+		/\{@actSaveFail\s+(\d+)\}/g,
+		"Failure by $1 or More:",
+	);
+	result = result.replace(/\{@actSaveFail\}/g, "Failure:");
+
+	// {@actSaveSuccessOrFail} → keep as-is label
+	result = result.replace(/\{@actSaveSuccessOrFail\}/g, "Success or Failure:");
+
+	// {@actSaveFailBy N} → "Failure by N or More:"
+	result = result.replace(
+		/\{@actSaveFailBy\s+(\d+)\}/g,
+		"Failure by $1 or More:",
+	);
+
+	// Generic tags: {@tag Display|Source|...} → Display (first segment before |)
+	// Covers: spell, condition, damage, dice, variantrule, action, skill,
+	//         creature, hazard, status, plus any unknown tags
+	result = result.replace(
+		/\{@(\w+)\s+([^}]+)\}/g,
+		(_, tag: string, content: string) => {
+			// For tags with Display|Source format, extract first segment
+			const segments = content.split("|");
+
+			// Some tags have a third segment as display text: {@variantrule Name|Source|Display}
+			if ((tag === "variantrule" || tag === "action") && segments.length >= 3) {
+				return segments[2];
+			}
+
+			return segments[0];
+		},
+	);
+
+	return result;
+}

apps/web/src/components/__tests__/turn-navigation.test.tsx

@@ -0,0 +1,219 @@
+// @vitest-environment jsdom
+import "@testing-library/jest-dom/vitest";
+
+import type { Encounter } from "@initiative/domain";
+import { combatantId } from "@initiative/domain";
+import { cleanup, render, screen } from "@testing-library/react";
+import { afterEach, describe, expect, it, vi } from "vitest";
+import { TurnNavigation } from "../turn-navigation";
+
+afterEach(cleanup);
+
+function renderNav(overrides: Partial<Encounter> = {}) {
+	const encounter: Encounter = {
+		combatants: [
+			{ id: combatantId("1"), name: "Goblin" },
+			{ id: combatantId("2"), name: "Conjurer" },
+		],
+		activeIndex: 0,
+		roundNumber: 1,
+		...overrides,
+	};
+
+	return render(
+		<TurnNavigation
+			encounter={encounter}
+			onAdvanceTurn={vi.fn()}
+			onRetreatTurn={vi.fn()}
+			onClearEncounter={vi.fn()}
+			onRollAllInitiative={vi.fn()}
+			onOpenSourceManager={vi.fn()}
+		/>,
+	);
+}
+
+describe("TurnNavigation", () => {
+	describe("US1: Round badge and combatant name", () => {
+		it("renders the round badge with correct round number", () => {
+			renderNav({ roundNumber: 3 });
+			expect(screen.getByText("R3")).toBeInTheDocument();
+		});
+
+		it("renders the combatant name separately from the round badge", () => {
+			renderNav();
+			const badge = screen.getByText("R1");
+			const name = screen.getByText("Goblin");
+			expect(badge).toBeInTheDocument();
+			expect(name).toBeInTheDocument();
+			expect(badge).not.toBe(name);
+			expect(badge.closest("[class]")).not.toBe(name.closest("[class]"));
+		});
+
+		it("does not render an em dash between round and name", () => {
+			const { container } = renderNav();
+			expect(container.textContent).not.toContain("—");
+		});
+
+		it("round badge and combatant name are in separate DOM elements", () => {
+			renderNav();
+			const badge = screen.getByText("R1");
+			const name = screen.getByText("Goblin");
+			expect(badge.parentElement).not.toBe(name.parentElement);
+		});
+
+		it("updates the round badge when round changes", () => {
+			const { rerender } = render(
+				<TurnNavigation
+					encounter={{
+						combatants: [{ id: combatantId("1"), name: "Goblin" }],
+						activeIndex: 0,
+						roundNumber: 2,
+					}}
+					onAdvanceTurn={vi.fn()}
+					onRetreatTurn={vi.fn()}
+					onClearEncounter={vi.fn()}
+					onRollAllInitiative={vi.fn()}
+					onOpenSourceManager={vi.fn()}
+				/>,
+			);
+			expect(screen.getByText("R2")).toBeInTheDocument();
+
+			rerender(
+				<TurnNavigation
+					encounter={{
+						combatants: [{ id: combatantId("1"), name: "Goblin" }],
+						activeIndex: 0,
+						roundNumber: 3,
+					}}
+					onAdvanceTurn={vi.fn()}
+					onRetreatTurn={vi.fn()}
+					onClearEncounter={vi.fn()}
+					onRollAllInitiative={vi.fn()}
+					onOpenSourceManager={vi.fn()}
+				/>,
+			);
+			expect(screen.getByText("R3")).toBeInTheDocument();
+			expect(screen.queryByText("R2")).not.toBeInTheDocument();
+		});
+
+		it("renders the next combatant name when turn advances", () => {
+			const { rerender } = render(
+				<TurnNavigation
+					encounter={{
+						combatants: [
+							{ id: combatantId("1"), name: "Goblin" },
+							{ id: combatantId("2"), name: "Conjurer" },
+						],
+						activeIndex: 0,
+						roundNumber: 1,
+					}}
+					onAdvanceTurn={vi.fn()}
+					onRetreatTurn={vi.fn()}
+					onClearEncounter={vi.fn()}
+					onRollAllInitiative={vi.fn()}
+					onOpenSourceManager={vi.fn()}
+				/>,
+			);
+			expect(screen.getByText("Goblin")).toBeInTheDocument();
+
+			rerender(
+				<TurnNavigation
+					encounter={{
+						combatants: [
+							{ id: combatantId("1"), name: "Goblin" },
+							{ id: combatantId("2"), name: "Conjurer" },
+						],
+						activeIndex: 1,
+						roundNumber: 1,
+					}}
+					onAdvanceTurn={vi.fn()}
+					onRetreatTurn={vi.fn()}
+					onClearEncounter={vi.fn()}
+					onRollAllInitiative={vi.fn()}
+					onOpenSourceManager={vi.fn()}
+				/>,
+			);
+			expect(screen.getByText("Conjurer")).toBeInTheDocument();
+		});
+	});
+
+	describe("US2: Layout robustness", () => {
+		it("applies truncation styles to long combatant names", () => {
+			const longName =
+				"Ancient Red Dragon Wyrm of the Northern Wastes and Beyond";
+			renderNav({
+				combatants: [{ id: combatantId("1"), name: longName }],
+			});
+			const nameEl = screen.getByText(longName);
+			expect(nameEl.className).toContain("truncate");
+		});
+
+		it("renders three-zone layout with a single-character name", () => {
+			renderNav({
+				combatants: [{ id: combatantId("1"), name: "O" }],
+			});
+			expect(screen.getByText("R1")).toBeInTheDocument();
+			expect(screen.getByText("O")).toBeInTheDocument();
+			expect(
+				screen.getByRole("button", { name: "Previous turn" }),
+			).toBeInTheDocument();
+			expect(
+				screen.getByRole("button", { name: "Next turn" }),
+			).toBeInTheDocument();
+		});
+
+		it("keeps all action buttons accessible regardless of name length", () => {
+			const longName = "A".repeat(60);
+			renderNav({
+				combatants: [{ id: combatantId("1"), name: longName }],
+			});
+			expect(
+				screen.getByRole("button", { name: "Previous turn" }),
+			).toBeInTheDocument();
+			expect(
+				screen.getByRole("button", { name: "Next turn" }),
+			).toBeInTheDocument();
+			expect(
+				screen.getByRole("button", {
+					name: "Roll all initiative",
+				}),
+			).toBeInTheDocument();
+			expect(
+				screen.getByRole("button", {
+					name: "Manage cached sources",
+				}),
+			).toBeInTheDocument();
+		});
+
+		it("renders a 40-character name without truncation class issues", () => {
+			const name40 = "A".repeat(40);
+			renderNav({
+				combatants: [{ id: combatantId("1"), name: name40 }],
+			});
+			const nameEl = screen.getByText(name40);
+			expect(nameEl).toBeInTheDocument();
+			// The truncate class is applied but CSS only visually truncates if content overflows
+			expect(nameEl.className).toContain("truncate");
+		});
+	});
+
+	describe("US3: No combatants state", () => {
+		it("shows the round badge when there are no combatants", () => {
+			renderNav({ combatants: [], roundNumber: 1 });
+			expect(screen.getByText("R1")).toBeInTheDocument();
+		});
+
+		it("shows 'No combatants' placeholder text", () => {
+			renderNav({ combatants: [] });
+			expect(screen.getByText("No combatants")).toBeInTheDocument();
+		});
+
+		it("disables navigation buttons when there are no combatants", () => {
+			renderNav({ combatants: [] });
+			expect(
+				screen.getByRole("button", { name: "Previous turn" }),
+			).toBeDisabled();
+			expect(screen.getByRole("button", { name: "Next turn" })).toBeDisabled();
+		});
+	});
+});

apps/web/src/components/ac-shield.tsx

@@ -0,0 +1,37 @@
+import { cn } from "../lib/utils";
+
+interface AcShieldProps {
+	readonly value: number | undefined;
+	readonly onClick?: () => void;
+	readonly className?: string;
+}
+
+export function AcShield({ value, onClick, className }: AcShieldProps) {
+	return (
+		<button
+			type="button"
+			onClick={onClick}
+			className={cn(
+				"relative inline-flex items-center justify-center text-sm tabular-nums text-muted-foreground transition-colors hover:text-hover-neutral",
+				className,
+			)}
+			style={{ width: 28, height: 32 }}
+		>
+			<svg
+				viewBox="0 0 28 32"
+				fill="none"
+				stroke="currentColor"
+				strokeWidth={1.5}
+				strokeLinecap="round"
+				strokeLinejoin="round"
+				className="absolute inset-0 h-full w-full"
+				aria-hidden="true"
+			>
+				<path d="M14 1.5 L2.5 6.5 L2.5 15 Q2.5 25 14 30.5 Q25.5 25 25.5 15 L25.5 6.5 Z" />
+			</svg>
+			<span className="relative text-xs font-medium leading-none">
+				{value !== undefined ? value : "\u2014"}
+			</span>
+		</button>
+	);
+}

apps/web/src/components/action-bar.tsx

@@ -0,0 +1,417 @@
+import { Check, Eye, Import, Minus, Plus } from "lucide-react";
+import { type FormEvent, useEffect, useRef, useState } from "react";
+import type { SearchResult } from "../hooks/use-bestiary.js";
+import { Button } from "./ui/button.js";
+import { Input } from "./ui/input.js";
+
+interface QueuedCreature {
+	result: SearchResult;
+	count: number;
+}
+
+interface ActionBarProps {
+	onAddCombatant: (
+		name: string,
+		opts?: { initiative?: number; ac?: number; maxHp?: number },
+	) => void;
+	onAddFromBestiary: (result: SearchResult) => void;
+	bestiarySearch: (query: string) => SearchResult[];
+	bestiaryLoaded: boolean;
+	onViewStatBlock?: (result: SearchResult) => void;
+	onBulkImport?: () => void;
+	bulkImportDisabled?: boolean;
+}
+
+function creatureKey(r: SearchResult): string {
+	return `${r.source}:${r.name}`;
+}
+
+export function ActionBar({
+	onAddCombatant,
+	onAddFromBestiary,
+	bestiarySearch,
+	bestiaryLoaded,
+	onViewStatBlock,
+	onBulkImport,
+	bulkImportDisabled,
+}: ActionBarProps) {
+	const [nameInput, setNameInput] = useState("");
+	const [suggestions, setSuggestions] = useState<SearchResult[]>([]);
+	const [suggestionIndex, setSuggestionIndex] = useState(-1);
+	const [queued, setQueued] = useState<QueuedCreature | null>(null);
+	const [customInit, setCustomInit] = useState("");
+	const [customAc, setCustomAc] = useState("");
+	const [customMaxHp, setCustomMaxHp] = useState("");
+
+	// Stat block viewer: separate dropdown
+	const [viewerOpen, setViewerOpen] = useState(false);
+	const [viewerQuery, setViewerQuery] = useState("");
+	const [viewerResults, setViewerResults] = useState<SearchResult[]>([]);
+	const [viewerIndex, setViewerIndex] = useState(-1);
+	const viewerRef = useRef<HTMLDivElement>(null);
+	const viewerInputRef = useRef<HTMLInputElement>(null);
+
+	const clearCustomFields = () => {
+		setCustomInit("");
+		setCustomAc("");
+		setCustomMaxHp("");
+	};
+
+	const confirmQueued = () => {
+		if (!queued) return;
+		for (let i = 0; i < queued.count; i++) {
+			onAddFromBestiary(queued.result);
+		}
+		setQueued(null);
+		setNameInput("");
+		setSuggestions([]);
+		setSuggestionIndex(-1);
+	};
+
+	const parseNum = (v: string): number | undefined => {
+		if (v.trim() === "") return undefined;
+		const n = Number(v);
+		return Number.isNaN(n) ? undefined : n;
+	};
+
+	const handleAdd = (e: FormEvent) => {
+		e.preventDefault();
+		if (queued) {
+			confirmQueued();
+			return;
+		}
+		if (nameInput.trim() === "") return;
+		const opts: { initiative?: number; ac?: number; maxHp?: number } = {};
+		const init = parseNum(customInit);
+		const ac = parseNum(customAc);
+		const maxHp = parseNum(customMaxHp);
+		if (init !== undefined) opts.initiative = init;
+		if (ac !== undefined) opts.ac = ac;
+		if (maxHp !== undefined) opts.maxHp = maxHp;
+		onAddCombatant(nameInput, Object.keys(opts).length > 0 ? opts : undefined);
+		setNameInput("");
+		setSuggestions([]);
+		clearCustomFields();
+	};
+
+	const handleNameChange = (value: string) => {
+		setNameInput(value);
+		setSuggestionIndex(-1);
+		let newSuggestions: SearchResult[] = [];
+		if (value.length >= 2) {
+			newSuggestions = bestiarySearch(value);
+			setSuggestions(newSuggestions);
+		} else {
+			setSuggestions([]);
+		}
+		if (newSuggestions.length > 0) {
+			clearCustomFields();
+		}
+		if (queued) {
+			const qKey = creatureKey(queued.result);
+			const stillVisible = newSuggestions.some((s) => creatureKey(s) === qKey);
+			if (!stillVisible) {
+				setQueued(null);
+			}
+		}
+	};
+
+	const handleClickSuggestion = (result: SearchResult) => {
+		const key = creatureKey(result);
+		if (queued && creatureKey(queued.result) === key) {
+			setQueued({ ...queued, count: queued.count + 1 });
+		} else {
+			setQueued({ result, count: 1 });
+		}
+	};
+
+	const handleEnter = () => {
+		if (queued) {
+			confirmQueued();
+		} else if (suggestionIndex >= 0) {
+			handleClickSuggestion(suggestions[suggestionIndex]);
+		}
+	};
+
+	const handleKeyDown = (e: React.KeyboardEvent) => {
+		if (suggestions.length === 0) return;
+
+		if (e.key === "ArrowDown") {
+			e.preventDefault();
+			setSuggestionIndex((i) => (i < suggestions.length - 1 ? i + 1 : 0));
+		} else if (e.key === "ArrowUp") {
+			e.preventDefault();
+			setSuggestionIndex((i) => (i > 0 ? i - 1 : suggestions.length - 1));
+		} else if (e.key === "Enter") {
+			e.preventDefault();
+			handleEnter();
+		} else if (e.key === "Escape") {
+			setQueued(null);
+			setSuggestionIndex(-1);
+			setSuggestions([]);
+		}
+	};
+
+	// Stat block viewer dropdown handlers
+	const openViewer = () => {
+		setViewerOpen(true);
+		setViewerQuery("");
+		setViewerResults([]);
+		setViewerIndex(-1);
+		requestAnimationFrame(() => viewerInputRef.current?.focus());
+	};
+
+	const closeViewer = () => {
+		setViewerOpen(false);
+		setViewerQuery("");
+		setViewerResults([]);
+		setViewerIndex(-1);
+	};
+
+	const handleViewerQueryChange = (value: string) => {
+		setViewerQuery(value);
+		setViewerIndex(-1);
+		if (value.length >= 2) {
+			setViewerResults(bestiarySearch(value));
+		} else {
+			setViewerResults([]);
+		}
+	};
+
+	const handleViewerSelect = (result: SearchResult) => {
+		onViewStatBlock?.(result);
+		closeViewer();
+	};
+
+	const handleViewerKeyDown = (e: React.KeyboardEvent) => {
+		if (e.key === "Escape") {
+			closeViewer();
+			return;
+		}
+		if (viewerResults.length === 0) return;
+
+		if (e.key === "ArrowDown") {
+			e.preventDefault();
+			setViewerIndex((i) => (i < viewerResults.length - 1 ? i + 1 : 0));
+		} else if (e.key === "ArrowUp") {
+			e.preventDefault();
+			setViewerIndex((i) => (i > 0 ? i - 1 : viewerResults.length - 1));
+		} else if (e.key === "Enter" && viewerIndex >= 0) {
+			e.preventDefault();
+			handleViewerSelect(viewerResults[viewerIndex]);
+		}
+	};
+
+	// Close viewer on outside click
+	useEffect(() => {
+		if (!viewerOpen) return;
+		function handleClickOutside(e: MouseEvent) {
+			if (viewerRef.current && !viewerRef.current.contains(e.target as Node)) {
+				closeViewer();
+			}
+		}
+		document.addEventListener("mousedown", handleClickOutside);
+		return () => document.removeEventListener("mousedown", handleClickOutside);
+	}, [viewerOpen]);
+
+	return (
+		<div className="flex items-center gap-3 rounded-md border border-border bg-card px-4 py-3">
+			<form
+				onSubmit={handleAdd}
+				className="relative flex flex-1 items-center gap-2"
+			>
+				<div className="relative flex-1">
+					<Input
+						type="text"
+						value={nameInput}
+						onChange={(e) => handleNameChange(e.target.value)}
+						onKeyDown={handleKeyDown}
+						placeholder="+ Add combatants"
+						className="max-w-xs"
+					/>
+					{suggestions.length > 0 && (
+						<div className="absolute bottom-full z-50 mb-1 w-full max-w-xs rounded-md border border-border bg-card shadow-lg">
+							<ul className="max-h-48 overflow-y-auto py-1">
+								{suggestions.map((result, i) => {
+									const key = creatureKey(result);
+									const isQueued =
+										queued !== null && creatureKey(queued.result) === key;
+									return (
+										<li key={key}>
+											<button
+												type="button"
+												className={`flex w-full items-center justify-between px-3 py-1.5 text-left text-sm ${
+													isQueued
+														? "bg-accent/30 text-foreground"
+														: i === suggestionIndex
+															? "bg-accent/20 text-foreground"
+															: "text-foreground hover:bg-hover-neutral-bg"
+												}`}
+												onMouseDown={(e) => e.preventDefault()}
+												onClick={() => handleClickSuggestion(result)}
+												onMouseEnter={() => setSuggestionIndex(i)}
+											>
+												<span>{result.name}</span>
+												<span className="flex items-center gap-1 text-xs text-muted-foreground">
+													{isQueued ? (
+														<>
+															<button
+																type="button"
+																className="rounded p-0.5 text-foreground hover:bg-accent/40"
+																onMouseDown={(e) => e.preventDefault()}
+																onClick={(e) => {
+																	e.stopPropagation();
+																	if (queued.count <= 1) {
+																		setQueued(null);
+																	} else {
+																		setQueued({
+																			...queued,
+																			count: queued.count - 1,
+																		});
+																	}
+																}}
+															>
+																<Minus className="h-3 w-3" />
+															</button>
+															<span className="min-w-5 rounded-full bg-accent px-1.5 py-0.5 text-center font-medium text-foreground">
+																{queued.count}
+															</span>
+															<button
+																type="button"
+																className="rounded p-0.5 text-foreground hover:bg-accent/40"
+																onMouseDown={(e) => e.preventDefault()}
+																onClick={(e) => {
+																	e.stopPropagation();
+																	setQueued({
+																		...queued,
+																		count: queued.count + 1,
+																	});
+																}}
+															>
+																<Plus className="h-3 w-3" />
+															</button>
+															<button
+																type="button"
+																className="ml-0.5 rounded p-0.5 text-foreground hover:bg-accent/40"
+																onMouseDown={(e) => e.preventDefault()}
+																onClick={(e) => {
+																	e.stopPropagation();
+																	confirmQueued();
+																}}
+															>
+																<Check className="h-3.5 w-3.5" />
+															</button>
+														</>
+													) : (
+														result.sourceDisplayName
+													)}
+												</span>
+											</button>
+										</li>
+									);
+								})}
+							</ul>
+						</div>
+					)}
+				</div>
+				{nameInput.length >= 2 && suggestions.length === 0 && (
+					<div className="flex items-center gap-2">
+						<Input
+							type="text"
+							inputMode="numeric"
+							value={customInit}
+							onChange={(e) => setCustomInit(e.target.value)}
+							placeholder="Init"
+							className="w-16 text-center"
+						/>
+						<Input
+							type="text"
+							inputMode="numeric"
+							value={customAc}
+							onChange={(e) => setCustomAc(e.target.value)}
+							placeholder="AC"
+							className="w-16 text-center"
+						/>
+						<Input
+							type="text"
+							inputMode="numeric"
+							value={customMaxHp}
+							onChange={(e) => setCustomMaxHp(e.target.value)}
+							placeholder="MaxHP"
+							className="w-18 text-center"
+						/>
+					</div>
+				)}
+				<Button type="submit" size="sm">
+					Add
+				</Button>
+				{bestiaryLoaded && onViewStatBlock && (
+					<div ref={viewerRef} className="relative">
+						<Button
+							type="button"
+							size="sm"
+							variant="ghost"
+							onClick={() => (viewerOpen ? closeViewer() : openViewer())}
+						>
+							<Eye className="h-4 w-4" />
+						</Button>
+						{viewerOpen && (
+							<div className="absolute bottom-full right-0 z-50 mb-1 w-64 rounded-md border border-border bg-card shadow-lg">
+								<div className="p-2">
+									<Input
+										ref={viewerInputRef}
+										type="text"
+										value={viewerQuery}
+										onChange={(e) => handleViewerQueryChange(e.target.value)}
+										onKeyDown={handleViewerKeyDown}
+										placeholder="Search stat blocks..."
+										className="w-full"
+									/>
+								</div>
+								{viewerResults.length > 0 && (
+									<ul className="max-h-48 overflow-y-auto border-t border-border py-1">
+										{viewerResults.map((result, i) => (
+											<li key={creatureKey(result)}>
+												<button
+													type="button"
+													className={`flex w-full items-center justify-between px-3 py-1.5 text-left text-sm ${
+														i === viewerIndex
+															? "bg-accent/20 text-foreground"
+															: "text-foreground hover:bg-hover-neutral-bg"
+													}`}
+													onClick={() => handleViewerSelect(result)}
+													onMouseEnter={() => setViewerIndex(i)}
+												>
+													<span>{result.name}</span>
+													<span className="text-xs text-muted-foreground">
+														{result.sourceDisplayName}
+													</span>
+												</button>
+											</li>
+										))}
+									</ul>
+								)}
+								{viewerQuery.length >= 2 && viewerResults.length === 0 && (
+									<div className="border-t border-border px-3 py-2 text-sm text-muted-foreground">
+										No creatures found
+									</div>
+								)}
+							</div>
+						)}
+					</div>
+				)}
+				{bestiaryLoaded && onBulkImport && (
+					<Button
+						type="button"
+						size="sm"
+						variant="ghost"
+						onClick={onBulkImport}
+						disabled={bulkImportDisabled}
+					>
+						<Import className="h-4 w-4" />
+					</Button>
+				)}
+			</form>
+		</div>
+	);
+}

apps/web/src/components/bulk-import-prompt.tsx

@@ -0,0 +1,115 @@
+import { Loader2 } from "lucide-react";
+import { useState } from "react";
+import { getAllSourceCodes } from "../adapters/bestiary-index-adapter.js";
+import type { BulkImportState } from "../hooks/use-bulk-import.js";
+import { Button } from "./ui/button.js";
+import { Input } from "./ui/input.js";
+
+const DEFAULT_BASE_URL =
+	"https://raw.githubusercontent.com/5etools-mirror-3/5etools-src/main/data/bestiary/";
+
+interface BulkImportPromptProps {
+	importState: BulkImportState;
+	onStartImport: (baseUrl: string) => void;
+	onDone: () => void;
+}
+
+export function BulkImportPrompt({
+	importState,
+	onStartImport,
+	onDone,
+}: BulkImportPromptProps) {
+	const [baseUrl, setBaseUrl] = useState(DEFAULT_BASE_URL);
+	const totalSources = getAllSourceCodes().length;
+
+	if (importState.status === "complete") {
+		return (
+			<div className="flex flex-col gap-4">
+				<div className="rounded-md border border-green-500/50 bg-green-500/10 px-3 py-2 text-sm text-green-400">
+					All sources loaded
+				</div>
+				<Button size="sm" onClick={onDone}>
+					Done
+				</Button>
+			</div>
+		);
+	}
+
+	if (importState.status === "partial-failure") {
+		return (
+			<div className="flex flex-col gap-4">
+				<div className="rounded-md border border-yellow-500/50 bg-yellow-500/10 px-3 py-2 text-sm text-yellow-400">
+					Loaded {importState.completed}/{importState.total} sources (
+					{importState.failed} failed)
+				</div>
+				<Button size="sm" onClick={onDone}>
+					Done
+				</Button>
+			</div>
+		);
+	}
+
+	if (importState.status === "loading") {
+		const processed = importState.completed + importState.failed;
+		const pct =
+			importState.total > 0
+				? Math.round((processed / importState.total) * 100)
+				: 0;
+
+		return (
+			<div className="flex flex-col gap-4">
+				<div className="flex items-center gap-2 text-sm text-muted-foreground">
+					<Loader2 className="h-4 w-4 animate-spin" />
+					Loading sources... {processed}/{importState.total}
+				</div>
+				<div className="h-2 overflow-hidden rounded-full bg-muted">
+					<div
+						className="h-full rounded-full bg-primary transition-all"
+						style={{ width: `${pct}%` }}
+					/>
+				</div>
+			</div>
+		);
+	}
+
+	// idle state
+	const isDisabled = !baseUrl.trim() || importState.status !== "idle";
+
+	return (
+		<div className="flex flex-col gap-4">
+			<div>
+				<h3 className="text-sm font-semibold text-foreground">
+					Bulk Import Sources
+				</h3>
+				<p className="mt-1 text-xs text-muted-foreground">
+					Load stat block data for all {totalSources} sources at once. This will
+					download approximately 12.5 MB of data.
+				</p>
+			</div>
+
+			<div className="flex flex-col gap-2">
+				<label
+					htmlFor="bulk-base-url"
+					className="text-xs text-muted-foreground"
+				>
+					Base URL
+				</label>
+				<Input
+					id="bulk-base-url"
+					type="url"
+					value={baseUrl}
+					onChange={(e) => setBaseUrl(e.target.value)}
+					className="text-xs"
+				/>
+			</div>
+
+			<Button
+				size="sm"
+				onClick={() => onStartImport(baseUrl)}
+				disabled={isDisabled}
+			>
+				Load All
+			</Button>
+		</div>
+	);
+}

apps/web/src/components/combatant-row.tsx

@@ -0,0 +1,606 @@
+import {
+	type CombatantId,
+	type ConditionId,
+	deriveHpStatus,
+} from "@initiative/domain";
+import { Brain, X } from "lucide-react";
+import { type Ref, useCallback, useEffect, useRef, useState } from "react";
+import { cn } from "../lib/utils";
+import { AcShield } from "./ac-shield";
+import { ConditionPicker } from "./condition-picker";
+import { ConditionTags } from "./condition-tags";
+import { D20Icon } from "./d20-icon";
+import { HpAdjustPopover } from "./hp-adjust-popover";
+import { ConfirmButton } from "./ui/confirm-button";
+import { Input } from "./ui/input";
+
+interface Combatant {
+	readonly id: CombatantId;
+	readonly name: string;
+	readonly initiative?: number;
+	readonly maxHp?: number;
+	readonly currentHp?: number;
+	readonly ac?: number;
+	readonly conditions?: readonly ConditionId[];
+	readonly isConcentrating?: boolean;
+}
+
+interface CombatantRowProps {
+	combatant: Combatant;
+	isActive: boolean;
+	onRename: (id: CombatantId, newName: string) => void;
+	onSetInitiative: (id: CombatantId, value: number | undefined) => void;
+	onRemove: (id: CombatantId) => void;
+	onSetHp: (id: CombatantId, maxHp: number | undefined) => void;
+	onAdjustHp: (id: CombatantId, delta: number) => void;
+	onSetAc: (id: CombatantId, value: number | undefined) => void;
+	onToggleCondition: (id: CombatantId, conditionId: ConditionId) => void;
+	onToggleConcentration: (id: CombatantId) => void;
+	onShowStatBlock?: () => void;
+	onRollInitiative?: (id: CombatantId) => void;
+}
+
+function EditableName({
+	name,
+	combatantId,
+	onRename,
+	onShowStatBlock,
+}: {
+	name: string;
+	combatantId: CombatantId;
+	onRename: (id: CombatantId, newName: string) => void;
+	onShowStatBlock?: () => void;
+}) {
+	const [editing, setEditing] = useState(false);
+	const [draft, setDraft] = useState(name);
+	const inputRef = useRef<HTMLInputElement>(null);
+	const clickTimerRef = useRef<ReturnType<typeof setTimeout>>(undefined);
+	const longPressTimerRef = useRef<ReturnType<typeof setTimeout>>(undefined);
+	const longPressTriggeredRef = useRef(false);
+
+	const commit = useCallback(() => {
+		const trimmed = draft.trim();
+		if (trimmed !== "" && trimmed !== name) {
+			onRename(combatantId, trimmed);
+		}
+		setEditing(false);
+	}, [draft, name, combatantId, onRename]);
+
+	const startEditing = useCallback(() => {
+		setDraft(name);
+		setEditing(true);
+		requestAnimationFrame(() => inputRef.current?.select());
+	}, [name]);
+
+	useEffect(() => {
+		return () => {
+			clearTimeout(clickTimerRef.current);
+			clearTimeout(longPressTimerRef.current);
+		};
+	}, []);
+
+	const handleClick = useCallback(
+		(e: React.MouseEvent) => {
+			e.stopPropagation();
+			if (longPressTriggeredRef.current) {
+				longPressTriggeredRef.current = false;
+				return;
+			}
+			if (clickTimerRef.current) {
+				clearTimeout(clickTimerRef.current);
+				clickTimerRef.current = undefined;
+				startEditing();
+			} else {
+				clickTimerRef.current = setTimeout(() => {
+					clickTimerRef.current = undefined;
+					onShowStatBlock?.();
+				}, 250);
+			}
+		},
+		[startEditing, onShowStatBlock],
+	);
+
+	const handleTouchStart = useCallback(() => {
+		longPressTriggeredRef.current = false;
+		longPressTimerRef.current = setTimeout(() => {
+			longPressTriggeredRef.current = true;
+			startEditing();
+		}, 500);
+	}, [startEditing]);
+
+	const cancelLongPress = useCallback(() => {
+		clearTimeout(longPressTimerRef.current);
+	}, []);
+
+	if (editing) {
+		return (
+			<Input
+				ref={inputRef}
+				type="text"
+				value={draft}
+				className="h-7 text-sm"
+				onChange={(e) => setDraft(e.target.value)}
+				onBlur={commit}
+				onKeyDown={(e) => {
+					if (e.key === "Enter") commit();
+					if (e.key === "Escape") setEditing(false);
+				}}
+			/>
+		);
+	}
+
+	return (
+		<>
+			<button
+				type="button"
+				onClick={handleClick}
+				onTouchStart={handleTouchStart}
+				onTouchEnd={cancelLongPress}
+				onTouchCancel={cancelLongPress}
+				onTouchMove={cancelLongPress}
+				className="truncate text-left text-sm text-foreground cursor-text hover:text-hover-neutral transition-colors"
+			>
+				{name}
+			</button>
+		</>
+	);
+}
+
+function MaxHpDisplay({
+	maxHp,
+	onCommit,
+}: {
+	maxHp: number | undefined;
+	onCommit: (value: number | undefined) => void;
+}) {
+	const [editing, setEditing] = useState(false);
+	const [draft, setDraft] = useState(maxHp?.toString() ?? "");
+	const inputRef = useRef<HTMLInputElement>(null);
+
+	const commit = useCallback(() => {
+		if (draft === "") {
+			onCommit(undefined);
+		} else {
+			const n = Number.parseInt(draft, 10);
+			if (!Number.isNaN(n) && n >= 1) {
+				onCommit(n);
+			}
+		}
+		setEditing(false);
+	}, [draft, onCommit]);
+
+	const startEditing = useCallback(() => {
+		setDraft(maxHp?.toString() ?? "");
+		setEditing(true);
+		requestAnimationFrame(() => inputRef.current?.select());
+	}, [maxHp]);
+
+	if (editing) {
+		return (
+			<Input
+				ref={inputRef}
+				type="text"
+				inputMode="numeric"
+				value={draft}
+				placeholder="Max"
+				className="h-7 w-[7ch] text-center text-sm tabular-nums"
+				onChange={(e) => setDraft(e.target.value)}
+				onBlur={commit}
+				onKeyDown={(e) => {
+					if (e.key === "Enter") commit();
+					if (e.key === "Escape") setEditing(false);
+				}}
+			/>
+		);
+	}
+
+	return (
+		<button
+			type="button"
+			onClick={startEditing}
+			className="inline-block h-7 min-w-[3ch] text-center text-sm leading-7 tabular-nums text-muted-foreground transition-colors hover:text-hover-neutral"
+		>
+			{maxHp ?? "Max"}
+		</button>
+	);
+}
+
+function ClickableHp({
+	currentHp,
+	maxHp,
+	onAdjust,
+	dimmed,
+}: {
+	currentHp: number | undefined;
+	maxHp: number | undefined;
+	onAdjust: (delta: number) => void;
+	dimmed?: boolean;
+}) {
+	const [popoverOpen, setPopoverOpen] = useState(false);
+	const status = deriveHpStatus(currentHp, maxHp);
+
+	if (maxHp === undefined) {
+		return (
+			<span
+				className={cn(
+					"inline-block h-7 w-[4ch] text-center text-sm leading-7 tabular-nums text-muted-foreground",
+					dimmed && "opacity-50",
+				)}
+			>
+				--
+			</span>
+		);
+	}
+
+	return (
+		<div className="relative">
+			<button
+				type="button"
+				onClick={() => setPopoverOpen(true)}
+				className={cn(
+					"inline-block h-7 min-w-[3ch] text-center text-sm font-medium leading-7 tabular-nums transition-colors hover:text-hover-neutral",
+					status === "bloodied" && "text-amber-400",
+					status === "unconscious" && "text-red-400",
+					status === "healthy" && "text-foreground",
+					dimmed && "opacity-50",
+				)}
+			>
+				{currentHp}
+			</button>
+			{popoverOpen && (
+				<HpAdjustPopover
+					onAdjust={onAdjust}
+					onClose={() => setPopoverOpen(false)}
+				/>
+			)}
+		</div>
+	);
+}
+
+function AcDisplay({
+	ac,
+	onCommit,
+}: {
+	ac: number | undefined;
+	onCommit: (value: number | undefined) => void;
+}) {
+	const [editing, setEditing] = useState(false);
+	const [draft, setDraft] = useState(ac?.toString() ?? "");
+	const inputRef = useRef<HTMLInputElement>(null);
+
+	const commit = useCallback(() => {
+		if (draft === "") {
+			onCommit(undefined);
+		} else {
+			const n = Number.parseInt(draft, 10);
+			if (!Number.isNaN(n) && n >= 0) {
+				onCommit(n);
+			}
+		}
+		setEditing(false);
+	}, [draft, onCommit]);
+
+	const startEditing = useCallback(() => {
+		setDraft(ac?.toString() ?? "");
+		setEditing(true);
+		requestAnimationFrame(() => inputRef.current?.select());
+	}, [ac]);
+
+	if (editing) {
+		return (
+			<Input
+				ref={inputRef}
+				type="text"
+				inputMode="numeric"
+				value={draft}
+				placeholder="AC"
+				className="h-7 w-[6ch] text-center text-sm tabular-nums"
+				onChange={(e) => setDraft(e.target.value)}
+				onBlur={commit}
+				onKeyDown={(e) => {
+					if (e.key === "Enter") commit();
+					if (e.key === "Escape") setEditing(false);
+				}}
+			/>
+		);
+	}
+
+	return <AcShield value={ac} onClick={startEditing} />;
+}
+
+function InitiativeDisplay({
+	initiative,
+	combatantId,
+	dimmed,
+	onSetInitiative,
+	onRollInitiative,
+}: {
+	initiative: number | undefined;
+	combatantId: CombatantId;
+	dimmed: boolean;
+	onSetInitiative: (id: CombatantId, value: number | undefined) => void;
+	onRollInitiative?: (id: CombatantId) => void;
+}) {
+	const [editing, setEditing] = useState(false);
+	const [draft, setDraft] = useState(initiative?.toString() ?? "");
+	const inputRef = useRef<HTMLInputElement>(null);
+
+	const commit = useCallback(() => {
+		if (draft === "") {
+			onSetInitiative(combatantId, undefined);
+		} else {
+			const n = Number.parseInt(draft, 10);
+			if (!Number.isNaN(n)) {
+				onSetInitiative(combatantId, n);
+			}
+		}
+		setEditing(false);
+	}, [draft, combatantId, onSetInitiative]);
+
+	const startEditing = useCallback(() => {
+		setDraft(initiative?.toString() ?? "");
+		setEditing(true);
+		requestAnimationFrame(() => inputRef.current?.select());
+	}, [initiative]);
+
+	if (editing) {
+		return (
+			<Input
+				ref={inputRef}
+				type="text"
+				inputMode="numeric"
+				value={draft}
+				placeholder="--"
+				className={cn(
+					"h-7 w-[6ch] text-center text-sm tabular-nums",
+					dimmed && "opacity-50",
+				)}
+				onChange={(e) => setDraft(e.target.value)}
+				onBlur={commit}
+				onKeyDown={(e) => {
+					if (e.key === "Enter") commit();
+					if (e.key === "Escape") setEditing(false);
+				}}
+			/>
+		);
+	}
+
+	// Empty + bestiary creature → d20 roll button
+	if (initiative === undefined && onRollInitiative) {
+		return (
+			<button
+				type="button"
+				onClick={() => onRollInitiative(combatantId)}
+				className={cn(
+					"flex h-7 w-full items-center justify-center text-muted-foreground transition-colors hover:text-hover-neutral",
+					dimmed && "opacity-50",
+				)}
+				title="Roll initiative"
+				aria-label="Roll initiative"
+			>
+				<D20Icon className="h-7 w-7" />
+			</button>
+		);
+	}
+
+	// Has value → bold number, click to edit
+	// Empty + manual → "--" placeholder, click to edit
+	return (
+		<button
+			type="button"
+			onClick={startEditing}
+			className={cn(
+				"h-7 w-full text-center text-sm leading-7 tabular-nums transition-colors",
+				initiative !== undefined
+					? "font-medium text-foreground hover:text-hover-neutral"
+					: "text-muted-foreground hover:text-hover-neutral",
+				dimmed && "opacity-50",
+			)}
+		>
+			{initiative ?? "--"}
+		</button>
+	);
+}
+
+function rowBorderClass(
+	isActive: boolean,
+	isConcentrating: boolean | undefined,
+): string {
+	if (isActive) return "border-l-2 border-l-accent bg-accent/10";
+	if (isConcentrating) return "border-l-2 border-l-purple-400";
+	return "border-l-2 border-l-transparent";
+}
+
+function concentrationIconClass(
+	isConcentrating: boolean | undefined,
+	dimmed: boolean,
+): string {
+	if (!isConcentrating)
+		return "opacity-0 group-hover:opacity-50 text-muted-foreground";
+	return dimmed ? "opacity-50 text-purple-400" : "opacity-100 text-purple-400";
+}
+
+function activateOnKeyDown(
+	handler: () => void,
+): (e: { key: string; preventDefault: () => void }) => void {
+	return (e) => {
+		if (e.key === "Enter" || e.key === " ") {
+			e.preventDefault();
+			handler();
+		}
+	};
+}
+
+export function CombatantRow({
+	ref,
+	combatant,
+	isActive,
+	onRename,
+	onSetInitiative,
+	onRemove,
+	onSetHp,
+	onAdjustHp,
+	onSetAc,
+	onToggleCondition,
+	onToggleConcentration,
+	onShowStatBlock,
+	onRollInitiative,
+}: CombatantRowProps & { ref?: Ref<HTMLDivElement> }) {
+	const { id, name, initiative, maxHp, currentHp } = combatant;
+	const status = deriveHpStatus(currentHp, maxHp);
+	const dimmed = status === "unconscious";
+	const [pickerOpen, setPickerOpen] = useState(false);
+
+	const prevHpRef = useRef(currentHp);
+	const [isPulsing, setIsPulsing] = useState(false);
+	const pulseTimerRef = useRef<ReturnType<typeof setTimeout>>(undefined);
+
+	useEffect(() => {
+		const prevHp = prevHpRef.current;
+		prevHpRef.current = currentHp;
+
+		if (
+			prevHp !== undefined &&
+			currentHp !== undefined &&
+			currentHp < prevHp &&
+			combatant.isConcentrating
+		) {
+			setIsPulsing(true);
+			clearTimeout(pulseTimerRef.current);
+			pulseTimerRef.current = setTimeout(() => setIsPulsing(false), 1200);
+		}
+	}, [currentHp, combatant.isConcentrating]);
+
+	useEffect(() => {
+		if (!combatant.isConcentrating) {
+			clearTimeout(pulseTimerRef.current);
+			setIsPulsing(false);
+		}
+	}, [combatant.isConcentrating]);
+
+	return (
+		/* biome-ignore lint/a11y/noStaticElementInteractions: role="button" is set conditionally when onShowStatBlock exists */
+		<div
+			ref={ref}
+			role={onShowStatBlock ? "button" : undefined}
+			tabIndex={onShowStatBlock ? 0 : undefined}
+			className={cn(
+				"group rounded-md pr-3 transition-colors",
+				rowBorderClass(isActive, combatant.isConcentrating),
+				isPulsing && "animate-concentration-pulse",
+				onShowStatBlock && "cursor-pointer",
+			)}
+			onClick={onShowStatBlock}
+			onKeyDown={
+				onShowStatBlock ? activateOnKeyDown(onShowStatBlock) : undefined
+			}
+		>
+			<div className="grid grid-cols-[2rem_3rem_1fr_auto_auto_2rem] items-center gap-3 py-2">
+				{/* Concentration */}
+				<button
+					type="button"
+					onClick={(e) => {
+						e.stopPropagation();
+						onToggleConcentration(id);
+					}}
+					title="Concentrating"
+					aria-label="Toggle concentration"
+					className={cn(
+						"flex w-full items-center justify-center self-stretch -my-2 -ml-[2px] pl-[14px] transition-opacity hover:text-hover-neutral hover:opacity-100",
+						concentrationIconClass(combatant.isConcentrating, dimmed),
+					)}
+				>
+					<Brain size={16} />
+				</button>
+
+				{/* Initiative */}
+				{/* biome-ignore lint/a11y/noStaticElementInteractions: stopPropagation wrapper for interactive children */}
+				<div
+					onClick={(e) => e.stopPropagation()}
+					onKeyDown={(e) => e.stopPropagation()}
+				>
+					<InitiativeDisplay
+						initiative={initiative}
+						combatantId={id}
+						dimmed={dimmed}
+						onSetInitiative={onSetInitiative}
+						onRollInitiative={onRollInitiative}
+					/>
+				</div>
+
+				{/* Name + Conditions */}
+				<div
+					className={cn(
+						"relative flex flex-wrap items-center gap-1 min-w-0",
+						dimmed && "opacity-50",
+					)}
+				>
+					<EditableName
+						name={name}
+						combatantId={id}
+						onRename={onRename}
+						onShowStatBlock={onShowStatBlock}
+					/>
+					<ConditionTags
+						conditions={combatant.conditions}
+						onRemove={(conditionId) => onToggleCondition(id, conditionId)}
+						onOpenPicker={() => setPickerOpen((prev) => !prev)}
+					/>
+					{pickerOpen && (
+						<ConditionPicker
+							activeConditions={combatant.conditions}
+							onToggle={(conditionId) => onToggleCondition(id, conditionId)}
+							onClose={() => setPickerOpen(false)}
+						/>
+					)}
+				</div>
+
+				{/* AC */}
+				{/* biome-ignore lint/a11y/noStaticElementInteractions: stopPropagation wrapper for interactive children */}
+				<div
+					className={cn(dimmed && "opacity-50")}
+					onClick={(e) => e.stopPropagation()}
+					onKeyDown={(e) => e.stopPropagation()}
+				>
+					<AcDisplay ac={combatant.ac} onCommit={(v) => onSetAc(id, v)} />
+				</div>
+
+				{/* HP */}
+				{/* biome-ignore lint/a11y/noStaticElementInteractions: stopPropagation wrapper for interactive children */}
+				<div
+					className="flex items-center gap-1"
+					onClick={(e) => e.stopPropagation()}
+					onKeyDown={(e) => e.stopPropagation()}
+				>
+					<ClickableHp
+						currentHp={currentHp}
+						maxHp={maxHp}
+						onAdjust={(delta) => onAdjustHp(id, delta)}
+						dimmed={dimmed}
+					/>
+					{maxHp !== undefined && (
+						<span
+							className={cn(
+								"text-sm tabular-nums text-muted-foreground",
+								dimmed && "opacity-50",
+							)}
+						>
+							/
+						</span>
+					)}
+					<div className={cn(dimmed && "opacity-50")}>
+						<MaxHpDisplay maxHp={maxHp} onCommit={(v) => onSetHp(id, v)} />
+					</div>
+				</div>
+
+				{/* Actions */}
+				<ConfirmButton
+					icon={<X size={16} />}
+					label="Remove combatant"
+					onConfirm={() => onRemove(id)}
+					className="h-7 w-7 text-muted-foreground opacity-0 pointer-events-none group-hover:opacity-100 group-hover:pointer-events-auto focus:opacity-100 focus:pointer-events-auto pointer-coarse:opacity-100 pointer-coarse:pointer-events-auto transition-opacity"
+				/>
+			</div>
+		</div>
+	);
+}

apps/web/src/components/condition-picker.tsx

@@ -0,0 +1,134 @@
+import { CONDITION_DEFINITIONS, type ConditionId } from "@initiative/domain";
+import type { LucideIcon } from "lucide-react";
+import {
+	ArrowDown,
+	Ban,
+	BatteryLow,
+	Droplet,
+	EarOff,
+	EyeOff,
+	Gem,
+	Ghost,
+	Hand,
+	Heart,
+	Link,
+	Moon,
+	Siren,
+	Sparkles,
+	ZapOff,
+} from "lucide-react";
+import { useEffect, useLayoutEffect, useRef, useState } from "react";
+import { cn } from "../lib/utils";
+
+const ICON_MAP: Record<string, LucideIcon> = {
+	EyeOff,
+	Heart,
+	EarOff,
+	BatteryLow,
+	Siren,
+	Hand,
+	Ban,
+	Ghost,
+	ZapOff,
+	Gem,
+	Droplet,
+	ArrowDown,
+	Link,
+	Sparkles,
+	Moon,
+};
+
+const COLOR_CLASSES: Record<string, string> = {
+	neutral: "text-muted-foreground",
+	pink: "text-pink-400",
+	amber: "text-amber-400",
+	orange: "text-orange-400",
+	gray: "text-gray-400",
+	violet: "text-violet-400",
+	yellow: "text-yellow-400",
+	slate: "text-slate-400",
+	green: "text-green-400",
+	indigo: "text-indigo-400",
+};
+
+interface ConditionPickerProps {
+	activeConditions: readonly ConditionId[] | undefined;
+	onToggle: (conditionId: ConditionId) => void;
+	onClose: () => void;
+}
+
+export function ConditionPicker({
+	activeConditions,
+	onToggle,
+	onClose,
+}: ConditionPickerProps) {
+	const ref = useRef<HTMLDivElement>(null);
+	const [flipped, setFlipped] = useState(false);
+	const [maxHeight, setMaxHeight] = useState<number | undefined>(undefined);
+
+	useLayoutEffect(() => {
+		const el = ref.current;
+		if (!el) return;
+		const rect = el.getBoundingClientRect();
+		const spaceBelow = window.innerHeight - rect.top;
+		const spaceAbove = rect.bottom;
+		const shouldFlip =
+			rect.bottom > window.innerHeight && spaceAbove > spaceBelow;
+		setFlipped(shouldFlip);
+		const available = shouldFlip ? spaceAbove : spaceBelow;
+		if (rect.height > available) {
+			setMaxHeight(available - 16);
+		}
+	}, []);
+
+	useEffect(() => {
+		function handleClickOutside(e: MouseEvent) {
+			if (ref.current && !ref.current.contains(e.target as Node)) {
+				onClose();
+			}
+		}
+		document.addEventListener("mousedown", handleClickOutside);
+		return () => document.removeEventListener("mousedown", handleClickOutside);
+	}, [onClose]);
+
+	const active = new Set(activeConditions ?? []);
+
+	return (
+		<div
+			ref={ref}
+			className={cn(
+				"absolute left-0 z-10 w-fit overflow-y-auto rounded-md border border-border bg-background p-1 shadow-lg",
+				flipped ? "bottom-full mb-1" : "top-full mt-1",
+			)}
+			style={maxHeight ? { maxHeight } : undefined}
+		>
+			{CONDITION_DEFINITIONS.map((def) => {
+				const Icon = ICON_MAP[def.iconName];
+				if (!Icon) return null;
+				const isActive = active.has(def.id);
+				const colorClass = COLOR_CLASSES[def.color] ?? "text-muted-foreground";
+				return (
+					<button
+						key={def.id}
+						type="button"
+						className={cn(
+							"flex w-full items-center gap-2 rounded px-2 py-1 text-sm transition-colors hover:bg-hover-neutral-bg",
+							isActive && "bg-card/50",
+						)}
+						onClick={() => onToggle(def.id)}
+					>
+						<Icon
+							size={14}
+							className={isActive ? colorClass : "text-muted-foreground"}
+						/>
+						<span
+							className={isActive ? "text-foreground" : "text-muted-foreground"}
+						>
+							{def.label}
+						</span>
+					</button>
+				);
+			})}
+		</div>
+	);
+}

apps/web/src/components/condition-tags.tsx

@@ -0,0 +1,102 @@
+import { CONDITION_DEFINITIONS, type ConditionId } from "@initiative/domain";
+import type { LucideIcon } from "lucide-react";
+import {
+	ArrowDown,
+	Ban,
+	BatteryLow,
+	Droplet,
+	EarOff,
+	EyeOff,
+	Gem,
+	Ghost,
+	Hand,
+	Heart,
+	Link,
+	Moon,
+	Plus,
+	Siren,
+	Sparkles,
+	ZapOff,
+} from "lucide-react";
+
+const ICON_MAP: Record<string, LucideIcon> = {
+	EyeOff,
+	Heart,
+	EarOff,
+	BatteryLow,
+	Siren,
+	Hand,
+	Ban,
+	Ghost,
+	ZapOff,
+	Gem,
+	Droplet,
+	ArrowDown,
+	Link,
+	Sparkles,
+	Moon,
+};
+
+const COLOR_CLASSES: Record<string, string> = {
+	neutral: "text-muted-foreground",
+	pink: "text-pink-400",
+	amber: "text-amber-400",
+	orange: "text-orange-400",
+	gray: "text-gray-400",
+	violet: "text-violet-400",
+	yellow: "text-yellow-400",
+	slate: "text-slate-400",
+	green: "text-green-400",
+	indigo: "text-indigo-400",
+};
+
+interface ConditionTagsProps {
+	conditions: readonly ConditionId[] | undefined;
+	onRemove: (conditionId: ConditionId) => void;
+	onOpenPicker: () => void;
+}
+
+export function ConditionTags({
+	conditions,
+	onRemove,
+	onOpenPicker,
+}: ConditionTagsProps) {
+	return (
+		<div className="flex flex-wrap items-center gap-0.5">
+			{conditions?.map((condId) => {
+				const def = CONDITION_DEFINITIONS.find((d) => d.id === condId);
+				if (!def) return null;
+				const Icon = ICON_MAP[def.iconName];
+				if (!Icon) return null;
+				const colorClass = COLOR_CLASSES[def.color] ?? "text-muted-foreground";
+				return (
+					<button
+						key={condId}
+						type="button"
+						title={def.label}
+						aria-label={`Remove ${def.label}`}
+						className={`inline-flex items-center rounded p-0.5 hover:bg-hover-neutral-bg transition-colors ${colorClass}`}
+						onClick={(e) => {
+							e.stopPropagation();
+							onRemove(condId);
+						}}
+					>
+						<Icon size={14} />
+					</button>
+				);
+			})}
+			<button
+				type="button"
+				title="Add condition"
+				aria-label="Add condition"
+				className="inline-flex items-center rounded p-0.5 text-muted-foreground hover:text-hover-neutral hover:bg-hover-neutral-bg transition-colors opacity-0 group-hover:opacity-100 focus:opacity-100 pointer-coarse:opacity-100 transition-opacity"
+				onClick={(e) => {
+					e.stopPropagation();
+					onOpenPicker();
+				}}
+			>
+				<Plus size={14} />
+			</button>
+		</div>
+	);
+}

apps/web/src/components/d20-icon.tsx

@@ -0,0 +1,29 @@
+interface D20IconProps {
+	readonly className?: string;
+}
+
+export function D20Icon({ className }: D20IconProps) {
+	return (
+		<svg
+			xmlns="http://www.w3.org/2000/svg"
+			height="24"
+			width="24"
+			viewBox="0 0 24 24"
+			fill="none"
+			stroke="currentColor"
+			strokeWidth={1.5}
+			strokeLinecap="round"
+			strokeLinejoin="round"
+			className={className}
+			aria-hidden="true"
+		>
+			<polygon points="20.22 16.76 20.22 7.26 12.04 2.51 3.85 7.26 3.85 16.76 12.04 21.51 20.22 16.76" />
+			<line x1="7.29" y1="9.26" x2="3.85" y2="7.26" />
+			<line x1="20.22" y1="7.26" x2="16.79" y2="9.26" />
+			<line x1="12.04" y1="17.44" x2="12.04" y2="21.51" />
+			<polygon points="12.04 17.44 20.22 16.76 16.79 9.26 12.04 17.44" />
+			<polygon points="12.04 17.44 7.29 9.26 3.85 16.76 12.04 17.44" />
+			<polygon points="12.04 2.51 7.29 9.26 16.79 9.26 12.04 2.51" />
+		</svg>
+	);
+}

apps/web/src/components/hp-adjust-popover.tsx

@@ -0,0 +1,139 @@
+import { Heart, Sword } from "lucide-react";
+import {
+	useCallback,
+	useEffect,
+	useLayoutEffect,
+	useRef,
+	useState,
+} from "react";
+import { Button } from "./ui/button";
+import { Input } from "./ui/input";
+
+interface HpAdjustPopoverProps {
+	readonly onAdjust: (delta: number) => void;
+	readonly onClose: () => void;
+}
+
+export function HpAdjustPopover({ onAdjust, onClose }: HpAdjustPopoverProps) {
+	const [inputValue, setInputValue] = useState("");
+	const [pos, setPos] = useState<{ top: number; left: number } | null>(null);
+	const ref = useRef<HTMLDivElement>(null);
+	const inputRef = useRef<HTMLInputElement>(null);
+
+	useLayoutEffect(() => {
+		const el = ref.current;
+		if (!el) return;
+		const parent = el.parentElement;
+		if (!parent) return;
+		const trigger = parent.getBoundingClientRect();
+		const popover = el.getBoundingClientRect();
+		const vw = document.documentElement.clientWidth;
+		let left = trigger.left;
+		if (left + popover.width > vw) {
+			left = vw - popover.width - 8;
+		}
+		if (left < 8) {
+			left = 8;
+		}
+		setPos({ top: trigger.bottom + 4, left });
+	}, []);
+
+	useEffect(() => {
+		requestAnimationFrame(() => inputRef.current?.focus());
+	}, []);
+
+	useEffect(() => {
+		function handleClickOutside(e: MouseEvent) {
+			if (ref.current && !ref.current.contains(e.target as Node)) {
+				onClose();
+			}
+		}
+		document.addEventListener("mousedown", handleClickOutside);
+		return () => document.removeEventListener("mousedown", handleClickOutside);
+	}, [onClose]);
+
+	const parsedValue =
+		inputValue === "" ? null : Number.parseInt(inputValue, 10);
+	const isValid =
+		parsedValue !== null && !Number.isNaN(parsedValue) && parsedValue > 0;
+
+	const applyDelta = useCallback(
+		(sign: -1 | 1) => {
+			if (inputValue === "") return;
+			const n = Number.parseInt(inputValue, 10);
+			if (Number.isNaN(n) || n <= 0) return;
+			onAdjust(sign * n);
+			onClose();
+		},
+		[inputValue, onAdjust, onClose],
+	);
+
+	const handleKeyDown = useCallback(
+		(e: React.KeyboardEvent<HTMLInputElement>) => {
+			if (e.key === "Enter") {
+				if (e.shiftKey) {
+					applyDelta(1);
+				} else {
+					applyDelta(-1);
+				}
+			} else if (e.key === "Escape") {
+				onClose();
+			}
+		},
+		[applyDelta, onClose],
+	);
+
+	return (
+		<div
+			ref={ref}
+			className="fixed z-10 rounded-md border border-border bg-background p-2 shadow-lg"
+			style={
+				pos
+					? { top: pos.top, left: pos.left }
+					: { visibility: "hidden" as const }
+			}
+		>
+			<div className="flex items-center gap-1">
+				<Input
+					ref={inputRef}
+					type="text"
+					inputMode="numeric"
+					value={inputValue}
+					placeholder="HP"
+					className="h-7 w-[7ch] text-center text-sm tabular-nums"
+					onChange={(e) => {
+						const v = e.target.value;
+						if (v === "" || /^\d+$/.test(v)) {
+							setInputValue(v);
+						}
+					}}
+					onKeyDown={handleKeyDown}
+				/>
+				<Button
+					type="button"
+					variant="ghost"
+					size="icon"
+					disabled={!isValid}
+					className="h-7 w-7 shrink-0 text-red-400 hover:bg-red-950 hover:text-red-300"
+					onClick={() => applyDelta(-1)}
+					title="Apply damage"
+					aria-label="Apply damage"
+				>
+					<Sword size={14} />
+				</Button>
+				<Button
+					type="button"
+					variant="ghost"
+					size="icon"
+					disabled={!isValid}
+					className="h-7 w-7 shrink-0 text-emerald-400 hover:bg-emerald-950 hover:text-emerald-300"
+					onClick={() => applyDelta(1)}
+					title="Apply healing"
+					aria-label="Apply healing"
+				>
+					<Heart size={14} />
+				</Button>
+			</div>
+		</div>
+	);
+}

apps/web/src/components/source-fetch-prompt.tsx

@@ -0,0 +1,131 @@
+import { Download, Loader2, Upload } from "lucide-react";
+import { useRef, useState } from "react";
+import { getDefaultFetchUrl } from "../adapters/bestiary-index-adapter.js";
+import { Button } from "./ui/button.js";
+import { Input } from "./ui/input.js";
+
+interface SourceFetchPromptProps {
+	sourceCode: string;
+	sourceDisplayName: string;
+	fetchAndCacheSource: (sourceCode: string, url: string) => Promise<void>;
+	onSourceLoaded: () => void;
+	onUploadSource: (sourceCode: string, jsonData: unknown) => Promise<void>;
+}
+
+export function SourceFetchPrompt({
+	sourceCode,
+	sourceDisplayName,
+	fetchAndCacheSource,
+	onSourceLoaded,
+	onUploadSource,
+}: SourceFetchPromptProps) {
+	const [url, setUrl] = useState(() => getDefaultFetchUrl(sourceCode));
+	const [status, setStatus] = useState<"idle" | "fetching" | "error">("idle");
+	const [error, setError] = useState<string>("");
+	const fileInputRef = useRef<HTMLInputElement>(null);
+
+	const handleFetch = async () => {
+		setStatus("fetching");
+		setError("");
+		try {
+			await fetchAndCacheSource(sourceCode, url);
+			onSourceLoaded();
+		} catch (e) {
+			setStatus("error");
+			setError(e instanceof Error ? e.message : "Failed to fetch source data");
+		}
+	};
+
+	const handleFileUpload = async (e: React.ChangeEvent<HTMLInputElement>) => {
+		const file = e.target.files?.[0];
+		if (!file) return;
+
+		setStatus("fetching");
+		setError("");
+
+		try {
+			const text = await file.text();
+			const json = JSON.parse(text);
+			await onUploadSource(sourceCode, json);
+			onSourceLoaded();
+		} catch (err) {
+			setStatus("error");
+			setError(
+				err instanceof Error ? err.message : "Failed to process uploaded file",
+			);
+		}
+
+		// Reset file input
+		if (fileInputRef.current) {
+			fileInputRef.current.value = "";
+		}
+	};
+
+	return (
+		<div className="flex flex-col gap-4">
+			<div>
+				<h3 className="text-sm font-semibold text-foreground">
+					Load {sourceDisplayName}
+				</h3>
+				<p className="mt-1 text-xs text-muted-foreground">
+					Stat block data for this source needs to be loaded. Enter a URL or
+					upload a JSON file.
+				</p>
+			</div>
+
+			<div className="flex flex-col gap-2">
+				<label htmlFor="source-url" className="text-xs text-muted-foreground">
+					Source URL
+				</label>
+				<Input
+					id="source-url"
+					type="url"
+					value={url}
+					onChange={(e) => setUrl(e.target.value)}
+					disabled={status === "fetching"}
+					className="text-xs"
+				/>
+			</div>
+
+			<div className="flex items-center gap-2">
+				<Button
+					size="sm"
+					onClick={handleFetch}
+					disabled={status === "fetching" || !url}
+				>
+					{status === "fetching" ? (
+						<Loader2 className="mr-1 h-3 w-3 animate-spin" />
+					) : (
+						<Download className="mr-1 h-3 w-3" />
+					)}
+					{status === "fetching" ? "Loading..." : "Load"}
+				</Button>
+
+				<span className="text-xs text-muted-foreground">or</span>
+
+				<Button
+					size="sm"
+					variant="outline"
+					onClick={() => fileInputRef.current?.click()}
+					disabled={status === "fetching"}
+				>
+					<Upload className="mr-1 h-3 w-3" />
+					Upload file
+				</Button>
+				<input
+					ref={fileInputRef}
+					type="file"
+					accept=".json"
+					className="hidden"
+					onChange={handleFileUpload}
+				/>
+			</div>
+
+			{status === "error" && (
+				<div className="rounded-md border border-destructive/50 bg-destructive/10 px-3 py-2 text-xs text-destructive">
+					{error}
+				</div>
+			)}
+		</div>
+	);
+}

apps/web/src/components/source-manager.tsx

@@ -0,0 +1,81 @@
+import { Database, Trash2 } from "lucide-react";
+import { useCallback, useEffect, useState } from "react";
+import type { CachedSourceInfo } from "../adapters/bestiary-cache.js";
+import * as bestiaryCache from "../adapters/bestiary-cache.js";
+import { Button } from "./ui/button.js";
+
+interface SourceManagerProps {
+	onCacheCleared: () => void;
+}
+
+export function SourceManager({ onCacheCleared }: SourceManagerProps) {
+	const [sources, setSources] = useState<CachedSourceInfo[]>([]);
+
+	const loadSources = useCallback(async () => {
+		const cached = await bestiaryCache.getCachedSources();
+		setSources(cached);
+	}, []);
+
+	useEffect(() => {
+		loadSources();
+	}, [loadSources]);
+
+	const handleClearSource = async (sourceCode: string) => {
+		await bestiaryCache.clearSource(sourceCode);
+		await loadSources();
+		onCacheCleared();
+	};
+
+	const handleClearAll = async () => {
+		await bestiaryCache.clearAll();
+		await loadSources();
+		onCacheCleared();
+	};
+
+	if (sources.length === 0) {
+		return (
+			<div className="flex flex-col items-center gap-2 py-8 text-center">
+				<Database className="h-8 w-8 text-muted-foreground" />
+				<p className="text-sm text-muted-foreground">No cached sources</p>
+			</div>
+		);
+	}
+
+	return (
+		<div className="flex flex-col gap-3">
+			<div className="flex items-center justify-between">
+				<span className="text-sm font-semibold text-foreground">
+					Cached Sources
+				</span>
+				<Button size="sm" variant="outline" onClick={handleClearAll}>
+					<Trash2 className="mr-1 h-3 w-3" />
+					Clear All
+				</Button>
+			</div>
+			<ul className="flex flex-col gap-1">
+				{sources.map((source) => (
+					<li
+						key={source.sourceCode}
+						className="flex items-center justify-between rounded-md border border-border px-3 py-2"
+					>
+						<div>
+							<span className="text-sm text-foreground">
+								{source.displayName}
+							</span>
+							<span className="ml-2 text-xs text-muted-foreground">
+								{source.creatureCount} creatures
+							</span>
+						</div>
+						<button
+							type="button"
+							onClick={() => handleClearSource(source.sourceCode)}
+							className="text-muted-foreground hover:text-hover-danger"
+						>
+							<Trash2 className="h-3.5 w-3.5" />
+						</button>
+					</li>
+				))}
+			</ul>
+		</div>
+	);
+}

apps/web/src/components/stat-block-panel.tsx

@@ -0,0 +1,344 @@
+import type { Creature, CreatureId } from "@initiative/domain";
+import { PanelRightClose, Pin, PinOff } from "lucide-react";
+import type { ReactNode } from "react";
+import { useEffect, useState } from "react";
+import { getSourceDisplayName } from "../adapters/bestiary-index-adapter.js";
+import type { BulkImportState } from "../hooks/use-bulk-import.js";
+import { useSwipeToDismiss } from "../hooks/use-swipe-to-dismiss.js";
+import { BulkImportPrompt } from "./bulk-import-prompt.js";
+import { SourceFetchPrompt } from "./source-fetch-prompt.js";
+import { StatBlock } from "./stat-block.js";
+
+interface StatBlockPanelProps {
+	creatureId: CreatureId | null;
+	creature: Creature | null;
+	isSourceCached: (sourceCode: string) => Promise<boolean>;
+	fetchAndCacheSource: (sourceCode: string, url: string) => Promise<void>;
+	uploadAndCacheSource: (
+		sourceCode: string,
+		jsonData: unknown,
+	) => Promise<void>;
+	refreshCache: () => Promise<void>;
+	panelRole: "browse" | "pinned";
+	isFolded: boolean;
+	onToggleFold: () => void;
+	onPin: () => void;
+	onUnpin: () => void;
+	showPinButton: boolean;
+	side: "left" | "right";
+	onDismiss: () => void;
+	bulkImportMode?: boolean;
+	bulkImportState?: BulkImportState;
+	onStartBulkImport?: (baseUrl: string) => void;
+	onBulkImportDone?: () => void;
+}
+
+function extractSourceCode(cId: CreatureId): string {
+	const colonIndex = cId.indexOf(":");
+	if (colonIndex === -1) return "";
+	return cId.slice(0, colonIndex).toUpperCase();
+}
+
+function FoldedTab({
+	creatureName,
+	side,
+	onToggleFold,
+}: {
+	creatureName: string;
+	side: "left" | "right";
+	onToggleFold: () => void;
+}) {
+	return (
+		<button
+			type="button"
+			onClick={onToggleFold}
+			className={`flex h-full w-[40px] cursor-pointer items-center justify-center text-muted-foreground hover:text-hover-neutral ${
+				side === "right" ? "self-start" : "self-end"
+			}`}
+			aria-label="Unfold stat block panel"
+		>
+			<span className="writing-vertical-rl text-sm font-medium">
+				{creatureName}
+			</span>
+		</button>
+	);
+}
+
+function PanelHeader({
+	panelRole,
+	showPinButton,
+	onToggleFold,
+	onPin,
+	onUnpin,
+}: {
+	panelRole: "browse" | "pinned";
+	showPinButton: boolean;
+	onToggleFold: () => void;
+	onPin: () => void;
+	onUnpin: () => void;
+}) {
+	return (
+		<div className="flex items-center justify-between border-b border-border px-4 py-2">
+			<div className="flex items-center gap-1">
+				{panelRole === "browse" && (
+					<button
+						type="button"
+						onClick={onToggleFold}
+						className="text-muted-foreground hover:text-hover-neutral"
+						aria-label="Fold stat block panel"
+					>
+						<PanelRightClose className="h-4 w-4" />
+					</button>
+				)}
+			</div>
+			<div className="flex items-center gap-1">
+				{panelRole === "browse" && showPinButton && (
+					<button
+						type="button"
+						onClick={onPin}
+						className="text-muted-foreground hover:text-hover-neutral"
+						aria-label="Pin creature"
+					>
+						<Pin className="h-4 w-4" />
+					</button>
+				)}
+				{panelRole === "pinned" && (
+					<button
+						type="button"
+						onClick={onUnpin}
+						className="text-muted-foreground hover:text-hover-neutral"
+						aria-label="Unpin creature"
+					>
+						<PinOff className="h-4 w-4" />
+					</button>
+				)}
+			</div>
+		</div>
+	);
+}
+
+function DesktopPanel({
+	isFolded,
+	side,
+	creatureName,
+	panelRole,
+	showPinButton,
+	onToggleFold,
+	onPin,
+	onUnpin,
+	children,
+}: {
+	isFolded: boolean;
+	side: "left" | "right";
+	creatureName: string;
+	panelRole: "browse" | "pinned";
+	showPinButton: boolean;
+	onToggleFold: () => void;
+	onPin: () => void;
+	onUnpin: () => void;
+	children: ReactNode;
+}) {
+	const sideClasses = side === "left" ? "left-0 border-r" : "right-0 border-l";
+	const foldedTranslate =
+		side === "right"
+			? "translate-x-[calc(100%-40px)]"
+			: "translate-x-[calc(-100%+40px)]";
+
+	return (
+		<div
+			className={`fixed top-0 bottom-0 flex w-[400px] flex-col border-border bg-card transition-slide-panel ${sideClasses} ${isFolded ? foldedTranslate : "translate-x-0"}`}
+		>
+			{isFolded ? (
+				<FoldedTab
+					creatureName={creatureName}
+					side={side}
+					onToggleFold={onToggleFold}
+				/>
+			) : (
+				<>
+					<PanelHeader
+						panelRole={panelRole}
+						showPinButton={showPinButton}
+						onToggleFold={onToggleFold}
+						onPin={onPin}
+						onUnpin={onUnpin}
+					/>
+					<div className="flex-1 overflow-y-auto p-4">{children}</div>
+				</>
+			)}
+		</div>
+	);
+}
+
+function MobileDrawer({
+	onDismiss,
+	children,
+}: {
+	onDismiss: () => void;
+	children: ReactNode;
+}) {
+	const { offsetX, isSwiping, handlers } = useSwipeToDismiss(onDismiss);
+
+	return (
+		<div className="fixed inset-0 z-50">
+			<button
+				type="button"
+				className="absolute inset-0 bg-black/50 animate-in fade-in"
+				onClick={onDismiss}
+				aria-label="Close stat block"
+			/>
+			<div
+				className={`absolute top-0 right-0 bottom-0 w-[85%] max-w-md border-l border-border bg-card shadow-xl ${isSwiping ? "" : "animate-slide-in-right"}`}
+				style={
+					isSwiping ? { transform: `translateX(${offsetX}px)` } : undefined
+				}
+				{...handlers}
+			>
+				<div className="flex items-center justify-between border-b border-border px-4 py-2">
+					<button
+						type="button"
+						onClick={onDismiss}
+						className="text-muted-foreground hover:text-hover-neutral"
+						aria-label="Fold stat block panel"
+					>
+						<PanelRightClose className="h-4 w-4" />
+					</button>
+				</div>
+				<div className="h-[calc(100%-41px)] overflow-y-auto p-4">
+					{children}
+				</div>
+			</div>
+		</div>
+	);
+}
+
+export function StatBlockPanel({
+	creatureId,
+	creature,
+	isSourceCached,
+	fetchAndCacheSource,
+	uploadAndCacheSource,
+	refreshCache,
+	panelRole,
+	isFolded,
+	onToggleFold,
+	onPin,
+	onUnpin,
+	showPinButton,
+	side,
+	onDismiss,
+	bulkImportMode,
+	bulkImportState,
+	onStartBulkImport,
+	onBulkImportDone,
+}: StatBlockPanelProps) {
+	const [isDesktop, setIsDesktop] = useState(
+		() => window.matchMedia("(min-width: 1024px)").matches,
+	);
+	const [needsFetch, setNeedsFetch] = useState(false);
+	const [checkingCache, setCheckingCache] = useState(false);
+
+	useEffect(() => {
+		const mq = window.matchMedia("(min-width: 1024px)");
+		const handler = (e: MediaQueryListEvent) => setIsDesktop(e.matches);
+		mq.addEventListener("change", handler);
+		return () => mq.removeEventListener("change", handler);
+	}, []);
+
+	useEffect(() => {
+		if (!creatureId || creature) {
+			setNeedsFetch(false);
+			return;
+		}
+
+		const sourceCode = extractSourceCode(creatureId);
+		if (!sourceCode) {
+			setNeedsFetch(false);
+			return;
+		}
+
+		setCheckingCache(true);
+		isSourceCached(sourceCode).then((cached) => {
+			setNeedsFetch(!cached);
+			setCheckingCache(false);
+		});
+	}, [creatureId, creature, isSourceCached]);
+
+	if (!creatureId && !bulkImportMode) return null;
+
+	const sourceCode = creatureId ? extractSourceCode(creatureId) : "";
+
+	const handleSourceLoaded = async () => {
+		await refreshCache();
+		setNeedsFetch(false);
+	};
+
+	const renderContent = () => {
+		if (
+			bulkImportMode &&
+			bulkImportState &&
+			onStartBulkImport &&
+			onBulkImportDone
+		) {
+			return (
+				<BulkImportPrompt
+					importState={bulkImportState}
+					onStartImport={onStartBulkImport}
+					onDone={onBulkImportDone}
+				/>
+			);
+		}
+
+		if (checkingCache) {
+			return (
+				<div className="p-4 text-sm text-muted-foreground">Loading...</div>
+			);
+		}
+
+		if (creature) {
+			return <StatBlock creature={creature} />;
+		}
+
+		if (needsFetch && sourceCode) {
+			return (
+				<SourceFetchPrompt
+					sourceCode={sourceCode}
+					sourceDisplayName={getSourceDisplayName(sourceCode)}
+					fetchAndCacheSource={fetchAndCacheSource}
+					onSourceLoaded={handleSourceLoaded}
+					onUploadSource={uploadAndCacheSource}
+				/>
+			);
+		}
+
+		return (
+			<div className="p-4 text-sm text-muted-foreground">
+				No stat block available
+			</div>
+		);
+	};
+
+	const creatureName =
+		creature?.name ?? (bulkImportMode ? "Bulk Import" : "Creature");
+
+	if (isDesktop) {
+		return (
+			<DesktopPanel
+				isFolded={isFolded}
+				side={side}
+				creatureName={creatureName}
+				panelRole={panelRole}
+				showPinButton={showPinButton}
+				onToggleFold={onToggleFold}
+				onPin={onPin}
+				onUnpin={onUnpin}
+			>
+				{renderContent()}
+			</DesktopPanel>
+		);
+	}
+
+	if (panelRole === "pinned") return null;
+
+	return <MobileDrawer onDismiss={onDismiss}>{renderContent()}</MobileDrawer>;
+}

apps/web/src/components/stat-block.tsx

@@ -0,0 +1,259 @@
+import {
+	type Creature,
+	calculateInitiative,
+	formatInitiativeModifier,
+} from "@initiative/domain";
+
+interface StatBlockProps {
+	creature: Creature;
+}
+
+function abilityMod(score: number): string {
+	const mod = Math.floor((score - 10) / 2);
+	return mod >= 0 ? `+${mod}` : `${mod}`;
+}
+
+function PropertyLine({
+	label,
+	value,
+}: {
+	label: string;
+	value: string | undefined;
+}) {
+	if (!value) return null;
+	return (
+		<div className="text-sm">
+			<span className="font-semibold">{label}</span> {value}
+		</div>
+	);
+}
+
+function SectionDivider() {
+	return (
+		<div className="my-2 h-px bg-gradient-to-r from-amber-800/60 via-amber-700/40 to-transparent" />
+	);
+}
+
+export function StatBlock({ creature }: StatBlockProps) {
+	const abilities = [
+		{ label: "STR", score: creature.abilities.str },
+		{ label: "DEX", score: creature.abilities.dex },
+		{ label: "CON", score: creature.abilities.con },
+		{ label: "INT", score: creature.abilities.int },
+		{ label: "WIS", score: creature.abilities.wis },
+		{ label: "CHA", score: creature.abilities.cha },
+	];
+
+	const initiative = calculateInitiative({
+		dexScore: creature.abilities.dex,
+		cr: creature.cr,
+		initiativeProficiency: creature.initiativeProficiency,
+	});
+
+	return (
+		<div className="space-y-1 text-foreground">
+			{/* Header */}
+			<div>
+				<h2 className="text-xl font-bold text-amber-400">{creature.name}</h2>
+				<p className="text-sm italic text-muted-foreground">
+					{creature.size} {creature.type}, {creature.alignment}
+				</p>
+				<p className="text-xs text-muted-foreground">
+					{creature.sourceDisplayName}
+				</p>
+			</div>
+
+			<SectionDivider />
+
+			{/* Stats bar */}
+			<div className="space-y-0.5 text-sm">
+				<div>
+					<span className="font-semibold">Armor Class</span> {creature.ac}
+					{creature.acSource && (
+						<span className="text-muted-foreground">
+							{" "}
+							({creature.acSource})
+						</span>
+					)}
+					<span className="ml-3">
+						<span className="font-semibold">Initiative</span>{" "}
+						{formatInitiativeModifier(initiative.modifier)} (
+						{initiative.passive})
+					</span>
+				</div>
+				<div>
+					<span className="font-semibold">Hit Points</span>{" "}
+					{creature.hp.average}{" "}
+					<span className="text-muted-foreground">({creature.hp.formula})</span>
+				</div>
+				<div>
+					<span className="font-semibold">Speed</span> {creature.speed}
+				</div>
+			</div>
+
+			<SectionDivider />
+
+			{/* Ability scores */}
+			<div className="grid grid-cols-6 gap-1 text-center text-sm">
+				{abilities.map(({ label, score }) => (
+					<div key={label}>
+						<div className="font-semibold">{label}</div>
+						<div>
+							{score}{" "}
+							<span className="text-muted-foreground">
+								({abilityMod(score)})
+							</span>
+						</div>
+					</div>
+				))}
+			</div>
+
+			<SectionDivider />
+
+			{/* Properties */}
+			<div className="space-y-0.5">
+				<PropertyLine label="Saving Throws" value={creature.savingThrows} />
+				<PropertyLine label="Skills" value={creature.skills} />
+				<PropertyLine
+					label="Damage Vulnerabilities"
+					value={creature.vulnerable}
+				/>
+				<PropertyLine label="Damage Resistances" value={creature.resist} />
+				<PropertyLine label="Damage Immunities" value={creature.immune} />
+				<PropertyLine
+					label="Condition Immunities"
+					value={creature.conditionImmune}
+				/>
+				<PropertyLine label="Senses" value={creature.senses} />
+				<PropertyLine label="Languages" value={creature.languages} />
+				<div className="text-sm">
+					<span className="font-semibold">Challenge</span> {creature.cr}{" "}
+					<span className="text-muted-foreground">
+						(Proficiency Bonus +{creature.proficiencyBonus})
+					</span>
+				</div>
+			</div>
+
+			{/* Traits */}
+			{creature.traits && creature.traits.length > 0 && (
+				<>
+					<SectionDivider />
+					<div className="space-y-2">
+						{creature.traits.map((t) => (
+							<div key={t.name} className="text-sm">
+								<span className="font-semibold italic">{t.name}.</span> {t.text}
+							</div>
+						))}
+					</div>
+				</>
+			)}
+
+			{/* Spellcasting */}
+			{creature.spellcasting && creature.spellcasting.length > 0 && (
+				<>
+					<SectionDivider />
+					{creature.spellcasting.map((sc) => (
+						<div key={sc.name} className="space-y-1 text-sm">
+							<div>
+								<span className="font-semibold italic">{sc.name}.</span>{" "}
+								{sc.headerText}
+							</div>
+							{sc.atWill && sc.atWill.length > 0 && (
+								<div className="pl-2">
+									<span className="font-semibold">At Will:</span>{" "}
+									{sc.atWill.join(", ")}
+								</div>
+							)}
+							{sc.daily?.map((d) => (
+								<div key={`${d.uses}${d.each ? "e" : ""}`} className="pl-2">
+									<span className="font-semibold">
+										{d.uses}/day
+										{d.each ? " each" : ""}:
+									</span>{" "}
+									{d.spells.join(", ")}
+								</div>
+							))}
+							{sc.restLong?.map((d) => (
+								<div
+									key={`rest-${d.uses}${d.each ? "e" : ""}`}
+									className="pl-2"
+								>
+									<span className="font-semibold">
+										{d.uses}/long rest
+										{d.each ? " each" : ""}:
+									</span>{" "}
+									{d.spells.join(", ")}
+								</div>
+							))}
+						</div>
+					))}
+				</>
+			)}
+
+			{/* Actions */}
+			{creature.actions && creature.actions.length > 0 && (
+				<>
+					<SectionDivider />
+					<h3 className="text-base font-bold text-amber-400">Actions</h3>
+					<div className="space-y-2">
+						{creature.actions.map((a) => (
+							<div key={a.name} className="text-sm">
+								<span className="font-semibold italic">{a.name}.</span> {a.text}
+							</div>
+						))}
+					</div>
+				</>
+			)}
+
+			{/* Bonus Actions */}
+			{creature.bonusActions && creature.bonusActions.length > 0 && (
+				<>
+					<SectionDivider />
+					<h3 className="text-base font-bold text-amber-400">Bonus Actions</h3>
+					<div className="space-y-2">
+						{creature.bonusActions.map((a) => (
+							<div key={a.name} className="text-sm">
+								<span className="font-semibold italic">{a.name}.</span> {a.text}
+							</div>
+						))}
+					</div>
+				</>
+			)}
+
+			{/* Reactions */}
+			{creature.reactions && creature.reactions.length > 0 && (
+				<>
+					<SectionDivider />
+					<h3 className="text-base font-bold text-amber-400">Reactions</h3>
+					<div className="space-y-2">
+						{creature.reactions.map((a) => (
+							<div key={a.name} className="text-sm">
+								<span className="font-semibold italic">{a.name}.</span> {a.text}
+							</div>
+						))}
+					</div>
+				</>
+			)}
+
+			{/* Legendary Actions */}
+			{creature.legendaryActions && (
+				<>
+					<SectionDivider />
+					<h3 className="text-base font-bold text-amber-400">
+						Legendary Actions
+					</h3>
+					<p className="text-sm italic text-muted-foreground">
+						{creature.legendaryActions.preamble}
+					</p>
+					<div className="space-y-2">
+						{creature.legendaryActions.entries.map((a) => (
+							<div key={a.name} className="text-sm">
+								<span className="font-semibold italic">{a.name}.</span> {a.text}
+							</div>
+						))}
+					</div>
+				</>
+			)}
+		</div>
+	);
+}

apps/web/src/components/toast.tsx

@@ -0,0 +1,47 @@
+import { X } from "lucide-react";
+import { useEffect } from "react";
+import { createPortal } from "react-dom";
+
+interface ToastProps {
+	message: string;
+	progress?: number;
+	onDismiss: () => void;
+	autoDismissMs?: number;
+}
+
+export function Toast({
+	message,
+	progress,
+	onDismiss,
+	autoDismissMs,
+}: ToastProps) {
+	useEffect(() => {
+		if (autoDismissMs === undefined) return;
+		const timer = setTimeout(onDismiss, autoDismissMs);
+		return () => clearTimeout(timer);
+	}, [autoDismissMs, onDismiss]);
+
+	return createPortal(
+		<div className="fixed bottom-4 left-1/2 z-50 -translate-x-1/2">
+			<div className="flex items-center gap-3 rounded-lg border border-border bg-card px-4 py-3 shadow-lg">
+				<span className="text-sm text-foreground">{message}</span>
+				{progress !== undefined && (
+					<div className="h-2 w-24 overflow-hidden rounded-full bg-muted">
+						<div
+							className="h-full rounded-full bg-primary transition-all"
+							style={{ width: `${Math.round(progress * 100)}%` }}
+						/>
+					</div>
+				)}
+				<button
+					type="button"
+					onClick={onDismiss}
+					className="text-muted-foreground hover:text-hover-neutral"
+				>
+					<X className="h-3 w-3" />
+				</button>
+			</div>
+		</div>,
+		document.body,
+	);
+}

apps/web/src/components/turn-navigation.tsx

@@ -0,0 +1,101 @@
+import type { Encounter } from "@initiative/domain";
+import { Settings, StepBack, StepForward, Trash2 } from "lucide-react";
+import { D20Icon } from "./d20-icon";
+import { Button } from "./ui/button";
+import { ConfirmButton } from "./ui/confirm-button";
+
+interface TurnNavigationProps {
+	encounter: Encounter;
+	onAdvanceTurn: () => void;
+	onRetreatTurn: () => void;
+	onClearEncounter: () => void;
+	onRollAllInitiative: () => void;
+	onOpenSourceManager: () => void;
+}
+
+export function TurnNavigation({
+	encounter,
+	onAdvanceTurn,
+	onRetreatTurn,
+	onClearEncounter,
+	onRollAllInitiative,
+	onOpenSourceManager,
+}: TurnNavigationProps) {
+	const hasCombatants = encounter.combatants.length > 0;
+	const isAtStart = encounter.roundNumber === 1 && encounter.activeIndex === 0;
+	const activeCombatant = encounter.combatants[encounter.activeIndex];
+
+	return (
+		<div className="flex items-center gap-3 rounded-md border border-border bg-card px-4 py-3">
+			<div className="flex flex-shrink-0 items-center gap-3">
+				<Button
+					variant="outline"
+					size="icon"
+					className="h-8 w-8 text-foreground border-foreground hover:text-hover-action hover:border-hover-action hover:bg-transparent"
+					onClick={onRetreatTurn}
+					disabled={!hasCombatants || isAtStart}
+					title="Previous turn"
+					aria-label="Previous turn"
+				>
+					<StepBack className="h-5 w-5" />
+				</Button>
+				<span className="rounded-full bg-muted text-foreground text-sm px-2 py-0.5 font-semibold">
+					R{encounter.roundNumber}
+				</span>
+			</div>
+
+			<div className="min-w-0 flex-1 text-center text-sm">
+				{activeCombatant ? (
+					<span className="truncate block font-medium">
+						{activeCombatant.name}
+					</span>
+				) : (
+					<span className="text-muted-foreground">No combatants</span>
+				)}
+			</div>
+
+			<div className="flex flex-shrink-0 items-center gap-3">
+				<div className="flex items-center gap-0">
+					<Button
+						variant="ghost"
+						size="icon"
+						className="h-8 w-8 text-muted-foreground hover:text-hover-action"
+						onClick={onRollAllInitiative}
+						title="Roll all initiative"
+						aria-label="Roll all initiative"
+					>
+						<D20Icon className="h-6 w-6" />
+					</Button>
+					<Button
+						variant="ghost"
+						size="icon"
+						className="h-8 w-8 text-muted-foreground hover:text-hover-neutral"
+						onClick={onOpenSourceManager}
+						title="Manage cached sources"
+						aria-label="Manage cached sources"
+					>
+						<Settings className="h-5 w-5" />
+					</Button>
+					<ConfirmButton
+						icon={<Trash2 className="h-5 w-5" />}
+						label="Clear encounter"
+						onConfirm={onClearEncounter}
+						disabled={!hasCombatants}
+						className="h-8 w-8 text-muted-foreground"
+					/>
+				</div>
+				<Button
+					variant="outline"
+					size="icon"
+					className="h-8 w-8 text-foreground border-foreground hover:text-hover-action hover:border-hover-action hover:bg-transparent"
+					onClick={onAdvanceTurn}
+					disabled={!hasCombatants}
+					title="Next turn"
+					aria-label="Next turn"
+				>
+					<StepForward className="h-5 w-5" />
+				</Button>
+			</div>
+		</div>
+	);
+}

apps/web/src/components/ui/button.tsx

@@ -0,0 +1,38 @@
+import { cva, type VariantProps } from "class-variance-authority";
+import type { ButtonHTMLAttributes } from "react";
+import { cn } from "../../lib/utils";
+
+const buttonVariants = cva(
+	"inline-flex items-center justify-center gap-2 rounded-md text-sm font-medium transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-primary disabled:pointer-events-none disabled:opacity-50",
+	{
+		variants: {
+			variant: {
+				default: "bg-primary text-primary-foreground hover:bg-primary/90",
+				outline:
+					"border border-border bg-transparent hover:bg-hover-neutral-bg hover:text-hover-neutral",
+				ghost: "hover:bg-hover-neutral-bg hover:text-hover-neutral",
+			},
+			size: {
+				default: "h-9 px-4 py-2",
+				sm: "h-8 px-3 text-xs",
+				icon: "h-8 w-8",
+			},
+		},
+		defaultVariants: {
+			variant: "default",
+			size: "default",
+		},
+	},
+);
+
+type ButtonProps = ButtonHTMLAttributes<HTMLButtonElement> &
+	VariantProps<typeof buttonVariants>;
+
+export function Button({ className, variant, size, ...props }: ButtonProps) {
+	return (
+		<button
+			className={cn(buttonVariants({ variant, size, className }))}
+			{...props}
+		/>
+	);
+}

apps/web/src/components/ui/confirm-button.tsx

@@ -0,0 +1,114 @@
+import { Check } from "lucide-react";
+import {
+	type ReactElement,
+	useCallback,
+	useEffect,
+	useRef,
+	useState,
+} from "react";
+import { cn } from "../../lib/utils";
+import { Button } from "./button";
+
+interface ConfirmButtonProps {
+	readonly onConfirm: () => void;
+	readonly icon: ReactElement;
+	readonly label: string;
+	readonly className?: string;
+	readonly disabled?: boolean;
+}
+
+const REVERT_TIMEOUT_MS = 5_000;
+
+export function ConfirmButton({
+	onConfirm,
+	icon,
+	label,
+	className,
+	disabled,
+}: ConfirmButtonProps) {
+	const [isConfirming, setIsConfirming] = useState(false);
+	const timerRef = useRef<ReturnType<typeof setTimeout>>(undefined);
+	const wrapperRef = useRef<HTMLDivElement>(null);
+
+	const revert = useCallback(() => {
+		setIsConfirming(false);
+		clearTimeout(timerRef.current);
+	}, []);
+
+	// Cleanup timer on unmount
+	useEffect(() => {
+		return () => clearTimeout(timerRef.current);
+	}, []);
+
+	// Click-outside listener when confirming
+	useEffect(() => {
+		if (!isConfirming) return;
+
+		function handleMouseDown(e: MouseEvent) {
+			if (
+				wrapperRef.current &&
+				!wrapperRef.current.contains(e.target as Node)
+			) {
+				revert();
+			}
+		}
+
+		function handleKeyDown(e: KeyboardEvent) {
+			if (e.key === "Escape") {
+				revert();
+			}
+		}
+
+		document.addEventListener("mousedown", handleMouseDown);
+		document.addEventListener("keydown", handleKeyDown);
+		return () => {
+			document.removeEventListener("mousedown", handleMouseDown);
+			document.removeEventListener("keydown", handleKeyDown);
+		};
+	}, [isConfirming, revert]);
+
+	const handleKeyDown = useCallback((e: React.KeyboardEvent) => {
+		if (e.key === "Enter" || e.key === " ") {
+			e.stopPropagation();
+		}
+	}, []);
+
+	const handleClick = useCallback(
+		(e: React.MouseEvent) => {
+			e.stopPropagation();
+			if (disabled) return;
+
+			if (isConfirming) {
+				revert();
+				onConfirm();
+			} else {
+				setIsConfirming(true);
+				clearTimeout(timerRef.current);
+				timerRef.current = setTimeout(revert, REVERT_TIMEOUT_MS);
+			}
+		},
+		[isConfirming, disabled, onConfirm, revert],
+	);
+
+	return (
+		<div ref={wrapperRef} className="inline-flex">
+			<Button
+				variant="ghost"
+				size="icon"
+				className={cn(
+					className,
+					isConfirming &&
+						"bg-destructive text-primary-foreground rounded-md animate-confirm-pulse hover:bg-destructive hover:text-primary-foreground",
+				)}
+				onClick={handleClick}
+				onKeyDown={handleKeyDown}
+				onBlur={revert}
+				disabled={disabled}
+				aria-label={isConfirming ? `Confirm ${label.toLowerCase()}` : label}
+				title={isConfirming ? `Confirm ${label.toLowerCase()}` : label}
+			>
+				{isConfirming ? <Check size={16} /> : icon}
+			</Button>
+		</div>
+	);
+}

apps/web/src/components/ui/input.tsx

@@ -0,0 +1,19 @@
+import { forwardRef, type InputHTMLAttributes } from "react";
+import { cn } from "../../lib/utils";
+
+type InputProps = InputHTMLAttributes<HTMLInputElement>;
+
+export const Input = forwardRef<HTMLInputElement, InputProps>(
+	({ className, ...props }, ref) => {
+		return (
+			<input
+				ref={ref}
+				className={cn(
+					"flex h-9 w-full rounded-md border border-input bg-transparent px-3 py-1 text-sm text-foreground shadow-sm transition-colors placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-1 focus-visible:ring-primary disabled:cursor-not-allowed disabled:opacity-50",
+					className,
+				)}
+				{...props}
+			/>
+		);
+	},
+);

apps/web/src/hooks/use-bestiary.ts

@@ -0,0 +1,126 @@
+import type {
+	BestiaryIndexEntry,
+	Creature,
+	CreatureId,
+} from "@initiative/domain";
+import { useCallback, useEffect, useRef, useState } from "react";
+import {
+	normalizeBestiary,
+	setSourceDisplayNames,
+} from "../adapters/bestiary-adapter.js";
+import * as bestiaryCache from "../adapters/bestiary-cache.js";
+import {
+	getSourceDisplayName,
+	loadBestiaryIndex,
+} from "../adapters/bestiary-index-adapter.js";
+
+export interface SearchResult extends BestiaryIndexEntry {
+	readonly sourceDisplayName: string;
+}
+
+interface BestiaryHook {
+	search: (query: string) => SearchResult[];
+	getCreature: (id: CreatureId) => Creature | undefined;
+	isLoaded: boolean;
+	isSourceCached: (sourceCode: string) => Promise<boolean>;
+	fetchAndCacheSource: (sourceCode: string, url: string) => Promise<void>;
+	uploadAndCacheSource: (
+		sourceCode: string,
+		jsonData: unknown,
+	) => Promise<void>;
+	refreshCache: () => Promise<void>;
+}
+
+export function useBestiary(): BestiaryHook {
+	const [isLoaded, setIsLoaded] = useState(false);
+	const creatureMapRef = useRef<Map<CreatureId, Creature>>(new Map());
+	const [, setTick] = useState(0);
+
+	useEffect(() => {
+		const index = loadBestiaryIndex();
+		setSourceDisplayNames(index.sources as Record<string, string>);
+		if (index.creatures.length > 0) {
+			setIsLoaded(true);
+		}
+
+		bestiaryCache.loadAllCachedCreatures().then((map) => {
+			creatureMapRef.current = map;
+			setTick((t) => t + 1);
+		});
+	}, []);
+
+	const search = useCallback((query: string): SearchResult[] => {
+		if (query.length < 2) return [];
+		const lower = query.toLowerCase();
+		const index = loadBestiaryIndex();
+		return index.creatures
+			.filter((c) => c.name.toLowerCase().includes(lower))
+			.sort((a, b) => a.name.localeCompare(b.name))
+			.slice(0, 10)
+			.map((c) => ({
+				...c,
+				sourceDisplayName: getSourceDisplayName(c.source),
+			}));
+	}, []);
+
+	const getCreature = useCallback((id: CreatureId): Creature | undefined => {
+		return creatureMapRef.current.get(id);
+	}, []);
+
+	const isSourceCachedFn = useCallback(
+		(sourceCode: string): Promise<boolean> => {
+			return bestiaryCache.isSourceCached(sourceCode);
+		},
+		[],
+	);
+
+	const fetchAndCacheSource = useCallback(
+		async (sourceCode: string, url: string): Promise<void> => {
+			const response = await fetch(url);
+			if (!response.ok) {
+				throw new Error(
+					`Failed to fetch: ${response.status} ${response.statusText}`,
+				);
+			}
+			const json = await response.json();
+			const creatures = normalizeBestiary(json);
+			const displayName = getSourceDisplayName(sourceCode);
+			await bestiaryCache.cacheSource(sourceCode, displayName, creatures);
+			for (const c of creatures) {
+				creatureMapRef.current.set(c.id, c);
+			}
+			setTick((t) => t + 1);
+		},
+		[],
+	);
+
+	const uploadAndCacheSource = useCallback(
+		async (sourceCode: string, jsonData: unknown): Promise<void> => {
+			// biome-ignore lint/suspicious/noExplicitAny: raw JSON shape varies
+			const creatures = normalizeBestiary(jsonData as any);
+			const displayName = getSourceDisplayName(sourceCode);
+			await bestiaryCache.cacheSource(sourceCode, displayName, creatures);
+			for (const c of creatures) {
+				creatureMapRef.current.set(c.id, c);
+			}
+			setTick((t) => t + 1);
+		},
+		[],
+	);
+
+	const refreshCache = useCallback(async (): Promise<void> => {
+		const map = await bestiaryCache.loadAllCachedCreatures();
+		creatureMapRef.current = map;
+		setTick((t) => t + 1);
+	}, []);
+
+	return {
+		search,
+		getCreature,
+		isLoaded,
+		isSourceCached: isSourceCachedFn,
+		fetchAndCacheSource,
+		uploadAndCacheSource,
+		refreshCache,
+	};
+}

apps/web/src/hooks/use-bulk-import.ts

@@ -0,0 +1,120 @@
+import { useCallback, useRef, useState } from "react";
+import {
+	getAllSourceCodes,
+	getDefaultFetchUrl,
+} from "../adapters/bestiary-index-adapter.js";
+
+const BATCH_SIZE = 6;
+
+export interface BulkImportState {
+	readonly status: "idle" | "loading" | "complete" | "partial-failure";
+	readonly total: number;
+	readonly completed: number;
+	readonly failed: number;
+}
+
+const IDLE_STATE: BulkImportState = {
+	status: "idle",
+	total: 0,
+	completed: 0,
+	failed: 0,
+};
+
+interface BulkImportHook {
+	state: BulkImportState;
+	startImport: (
+		baseUrl: string,
+		fetchAndCacheSource: (sourceCode: string, url: string) => Promise<void>,
+		isSourceCached: (sourceCode: string) => Promise<boolean>,
+		refreshCache: () => Promise<void>,
+	) => void;
+	reset: () => void;
+}
+
+export function useBulkImport(): BulkImportHook {
+	const [state, setState] = useState<BulkImportState>(IDLE_STATE);
+	const countersRef = useRef({ completed: 0, failed: 0 });
+
+	const startImport = useCallback(
+		(
+			baseUrl: string,
+			fetchAndCacheSource: (sourceCode: string, url: string) => Promise<void>,
+			isSourceCached: (sourceCode: string) => Promise<boolean>,
+			refreshCache: () => Promise<void>,
+		) => {
+			const allCodes = getAllSourceCodes();
+			const total = allCodes.length;
+
+			countersRef.current = { completed: 0, failed: 0 };
+			setState({ status: "loading", total, completed: 0, failed: 0 });
+
+			(async () => {
+				const cacheChecks = await Promise.all(
+					allCodes.map(async (code) => ({
+						code,
+						cached: await isSourceCached(code),
+					})),
+				);
+
+				const alreadyCached = cacheChecks.filter((c) => c.cached).length;
+				const uncached = cacheChecks.filter((c) => !c.cached);
+
+				countersRef.current.completed = alreadyCached;
+
+				if (uncached.length === 0) {
+					setState({
+						status: "complete",
+						total,
+						completed: total,
+						failed: 0,
+					});
+					return;
+				}
+
+				setState((s) => ({ ...s, completed: alreadyCached }));
+
+				for (let i = 0; i < uncached.length; i += BATCH_SIZE) {
+					const batch = uncached.slice(i, i + BATCH_SIZE);
+					await Promise.allSettled(
+						batch.map(async ({ code }) => {
+							const url = getDefaultFetchUrl(code, baseUrl);
+							try {
+								await fetchAndCacheSource(code, url);
+								countersRef.current.completed++;
+							} catch (err) {
+								countersRef.current.failed++;
+								console.warn(
+									`[bulk-import] FAILED ${code} (${url}):`,
+									err instanceof Error ? err.message : err,
+								);
+							}
+							setState({
+								status: "loading",
+								total,
+								completed: countersRef.current.completed,
+								failed: countersRef.current.failed,
+							});
+						}),
+					);
+				}
+
+				await refreshCache();
+
+				const { completed, failed } = countersRef.current;
+				setState({
+					status: failed > 0 ? "partial-failure" : "complete",
+					total,
+					completed,
+					failed,
+				});
+			})();
+		},
+		[],
+	);
+
+	const reset = useCallback(() => {
+		setState(IDLE_STATE);
+	}, []);
+
+	return { state, startImport, reset };
+}

apps/web/src/hooks/use-encounter.ts

@@ -0,0 +1,348 @@
+import type { EncounterStore } from "@initiative/application";
+import {
+	addCombatantUseCase,
+	adjustHpUseCase,
+	advanceTurnUseCase,
+	clearEncounterUseCase,
+	editCombatantUseCase,
+	removeCombatantUseCase,
+	retreatTurnUseCase,
+	setAcUseCase,
+	setHpUseCase,
+	setInitiativeUseCase,
+	toggleConcentrationUseCase,
+	toggleConditionUseCase,
+} from "@initiative/application";
+import type {
+	BestiaryIndexEntry,
+	CombatantId,
+	ConditionId,
+	DomainEvent,
+	Encounter,
+} from "@initiative/domain";
+import {
+	combatantId,
+	createEncounter,
+	isDomainError,
+	creatureId as makeCreatureId,
+	resolveCreatureName,
+} from "@initiative/domain";
+import { useCallback, useEffect, useRef, useState } from "react";
+import {
+	loadEncounter,
+	saveEncounter,
+} from "../persistence/encounter-storage.js";
+
+function createDemoEncounter(): Encounter {
+	const result = createEncounter([
+		{ id: combatantId("1"), name: "Aria" },
+		{ id: combatantId("2"), name: "Brak" },
+		{ id: combatantId("3"), name: "Cael" },
+	]);
+
+	if (isDomainError(result)) {
+		throw new Error(`Failed to create demo encounter: ${result.message}`);
+	}
+
+	return result;
+}
+
+function initializeEncounter(): Encounter {
+	const stored = loadEncounter();
+	if (stored !== null) return stored;
+	return createDemoEncounter();
+}
+
+function deriveNextId(encounter: Encounter): number {
+	let max = 0;
+	for (const c of encounter.combatants) {
+		const match = /^c-(\d+)$/.exec(c.id);
+		if (match) {
+			const n = Number.parseInt(match[1], 10);
+			if (n > max) max = n;
+		}
+	}
+	return max;
+}
+
+interface CombatantOpts {
+	initiative?: number;
+	ac?: number;
+	maxHp?: number;
+}
+
+function applyCombatantOpts(
+	makeStore: () => EncounterStore,
+	id: ReturnType<typeof combatantId>,
+	opts: CombatantOpts,
+): DomainEvent[] {
+	const events: DomainEvent[] = [];
+	if (opts.maxHp !== undefined) {
+		const r = setHpUseCase(makeStore(), id, opts.maxHp);
+		if (!isDomainError(r)) events.push(...r);
+	}
+	if (opts.ac !== undefined) {
+		const r = setAcUseCase(makeStore(), id, opts.ac);
+		if (!isDomainError(r)) events.push(...r);
+	}
+	if (opts.initiative !== undefined) {
+		const r = setInitiativeUseCase(makeStore(), id, opts.initiative);
+		if (!isDomainError(r)) events.push(...r);
+	}
+	return events;
+}
+
+export function useEncounter() {
+	const [encounter, setEncounter] = useState<Encounter>(initializeEncounter);
+	const [events, setEvents] = useState<DomainEvent[]>([]);
+	const encounterRef = useRef(encounter);
+	encounterRef.current = encounter;
+
+	useEffect(() => {
+		saveEncounter(encounter);
+	}, [encounter]);
+
+	const makeStore = useCallback((): EncounterStore => {
+		return {
+			get: () => encounterRef.current,
+			save: (e) => {
+				encounterRef.current = e;
+				setEncounter(e);
+			},
+		};
+	}, []);
+
+	const advanceTurn = useCallback(() => {
+		const result = advanceTurnUseCase(makeStore());
+
+		if (isDomainError(result)) {
+			return;
+		}
+
+		setEvents((prev) => [...prev, ...result]);
+	}, [makeStore]);
+
+	const retreatTurn = useCallback(() => {
+		const result = retreatTurnUseCase(makeStore());
+
+		if (isDomainError(result)) {
+			return;
+		}
+
+		setEvents((prev) => [...prev, ...result]);
+	}, [makeStore]);
+
+	const nextId = useRef(deriveNextId(encounter));
+
+	const addCombatant = useCallback(
+		(name: string, opts?: CombatantOpts) => {
+			const id = combatantId(`c-${++nextId.current}`);
+			const result = addCombatantUseCase(makeStore(), id, name);
+
+			if (isDomainError(result)) {
+				return;
+			}
+
+			if (opts) {
+				const optEvents = applyCombatantOpts(makeStore, id, opts);
+				if (optEvents.length > 0) {
+					setEvents((prev) => [...prev, ...optEvents]);
+				}
+			}
+
+			setEvents((prev) => [...prev, ...result]);
+		},
+		[makeStore],
+	);
+
+	const removeCombatant = useCallback(
+		(id: CombatantId) => {
+			const result = removeCombatantUseCase(makeStore(), id);
+
+			if (isDomainError(result)) {
+				return;
+			}
+
+			setEvents((prev) => [...prev, ...result]);
+		},
+		[makeStore],
+	);
+
+	const editCombatant = useCallback(
+		(id: CombatantId, newName: string) => {
+			const result = editCombatantUseCase(makeStore(), id, newName);
+
+			if (isDomainError(result)) {
+				return;
+			}
+
+			setEvents((prev) => [...prev, ...result]);
+		},
+		[makeStore],
+	);
+
+	const setInitiative = useCallback(
+		(id: CombatantId, value: number | undefined) => {
+			const result = setInitiativeUseCase(makeStore(), id, value);
+
+			if (isDomainError(result)) {
+				return;
+			}
+
+			setEvents((prev) => [...prev, ...result]);
+		},
+		[makeStore],
+	);
+
+	const setHp = useCallback(
+		(id: CombatantId, maxHp: number | undefined) => {
+			const result = setHpUseCase(makeStore(), id, maxHp);
+
+			if (isDomainError(result)) {
+				return;
+			}
+
+			setEvents((prev) => [...prev, ...result]);
+		},
+		[makeStore],
+	);
+
+	const adjustHp = useCallback(
+		(id: CombatantId, delta: number) => {
+			const result = adjustHpUseCase(makeStore(), id, delta);
+
+			if (isDomainError(result)) {
+				return;
+			}
+
+			setEvents((prev) => [...prev, ...result]);
+		},
+		[makeStore],
+	);
+
+	const setAc = useCallback(
+		(id: CombatantId, value: number | undefined) => {
+			const result = setAcUseCase(makeStore(), id, value);
+
+			if (isDomainError(result)) {
+				return;
+			}
+
+			setEvents((prev) => [...prev, ...result]);
+		},
+		[makeStore],
+	);
+
+	const toggleCondition = useCallback(
+		(id: CombatantId, conditionId: ConditionId) => {
+			const result = toggleConditionUseCase(makeStore(), id, conditionId);
+
+			if (isDomainError(result)) {
+				return;
+			}
+
+			setEvents((prev) => [...prev, ...result]);
+		},
+		[makeStore],
+	);
+
+	const toggleConcentration = useCallback(
+		(id: CombatantId) => {
+			const result = toggleConcentrationUseCase(makeStore(), id);
+
+			if (isDomainError(result)) {
+				return;
+			}
+
+			setEvents((prev) => [...prev, ...result]);
+		},
+		[makeStore],
+	);
+
+	const clearEncounter = useCallback(() => {
+		const result = clearEncounterUseCase(makeStore());
+
+		if (isDomainError(result)) {
+			return;
+		}
+
+		nextId.current = 0;
+		setEvents((prev) => [...prev, ...result]);
+	}, [makeStore]);
+
+	const addFromBestiary = useCallback(
+		(entry: BestiaryIndexEntry) => {
+			const store = makeStore();
+			const existingNames = store.get().combatants.map((c) => c.name);
+			const { newName, renames } = resolveCreatureName(
+				entry.name,
+				existingNames,
+			);
+
+			// Apply renames (e.g., "Goblin" → "Goblin 1")
+			for (const { from, to } of renames) {
+				const target = store.get().combatants.find((c) => c.name === from);
+				if (target) {
+					editCombatantUseCase(makeStore(), target.id, to);
+				}
+			}
+
+			// Add combatant with resolved name
+			const id = combatantId(`c-${++nextId.current}`);
+			const addResult = addCombatantUseCase(makeStore(), id, newName);
+			if (isDomainError(addResult)) return;
+
+			// Set HP
+			const hpResult = setHpUseCase(makeStore(), id, entry.hp);
+			if (!isDomainError(hpResult)) {
+				setEvents((prev) => [...prev, ...hpResult]);
+			}
+
+			// Set AC
+			if (entry.ac > 0) {
+				const acResult = setAcUseCase(makeStore(), id, entry.ac);
+				if (!isDomainError(acResult)) {
+					setEvents((prev) => [...prev, ...acResult]);
+				}
+			}
+
+			// Derive creatureId from source + name
+			const slug = entry.name
+				.toLowerCase()
+				.replace(/[^a-z0-9]+/g, "-")
+				.replace(/(^-|-$)/g, "");
+			const cId = makeCreatureId(`${entry.source.toLowerCase()}:${slug}`);
+
+			// Set creatureId on the combatant (use store.save to keep ref in sync for batch calls)
+			const currentEncounter = store.get();
+			store.save({
+				...currentEncounter,
+				combatants: currentEncounter.combatants.map((c) =>
+					c.id === id ? { ...c, creatureId: cId } : c,
+				),
+			});
+
+			setEvents((prev) => [...prev, ...addResult]);
+		},
+		[makeStore, editCombatant],
+	);
+
+	return {
+		encounter,
+		events,
+		advanceTurn,
+		retreatTurn,
+		addCombatant,
+		clearEncounter,
+		removeCombatant,
+		editCombatant,
+		setInitiative,
+		setHp,
+		adjustHp,
+		setAc,
+		toggleCondition,
+		toggleConcentration,
+		addFromBestiary,
+		makeStore,
+	} as const;
+}

apps/web/src/hooks/use-swipe-to-dismiss.ts

@@ -0,0 +1,72 @@
+import { useCallback, useRef, useState } from "react";
+
+const DISMISS_THRESHOLD = 0.35;
+const VELOCITY_THRESHOLD = 0.5;
+
+interface SwipeState {
+	offsetX: number;
+	isSwiping: boolean;
+}
+
+export function useSwipeToDismiss(onDismiss: () => void) {
+	const [swipe, setSwipe] = useState<SwipeState>({
+		offsetX: 0,
+		isSwiping: false,
+	});
+	const startX = useRef(0);
+	const startY = useRef(0);
+	const startTime = useRef(0);
+	const panelWidth = useRef(0);
+	const directionLocked = useRef<"horizontal" | "vertical" | null>(null);
+
+	const onTouchStart = useCallback((e: React.TouchEvent) => {
+		const touch = e.touches[0];
+		startX.current = touch.clientX;
+		startY.current = touch.clientY;
+		startTime.current = Date.now();
+		directionLocked.current = null;
+		const el = e.currentTarget as HTMLElement;
+		panelWidth.current = el.getBoundingClientRect().width;
+	}, []);
+
+	const onTouchMove = useCallback((e: React.TouchEvent) => {
+		const touch = e.touches[0];
+		const dx = touch.clientX - startX.current;
+		const dy = touch.clientY - startY.current;
+
+		if (!directionLocked.current) {
+			if (Math.abs(dx) < 10 && Math.abs(dy) < 10) return;
+			directionLocked.current =
+				Math.abs(dx) > Math.abs(dy) ? "horizontal" : "vertical";
+		}
+
+		if (directionLocked.current === "vertical") return;
+
+		const clampedX = Math.max(0, dx);
+		setSwipe({ offsetX: clampedX, isSwiping: true });
+	}, []);
+
+	const onTouchEnd = useCallback(() => {
+		if (directionLocked.current !== "horizontal") {
+			setSwipe({ offsetX: 0, isSwiping: false });
+			return;
+		}
+
+		const elapsed = (Date.now() - startTime.current) / 1000;
+		const velocity = swipe.offsetX / elapsed / panelWidth.current;
+		const ratio =
+			panelWidth.current > 0 ? swipe.offsetX / panelWidth.current : 0;
+
+		if (ratio > DISMISS_THRESHOLD || velocity > VELOCITY_THRESHOLD) {
+			onDismiss();
+		}
+
+		setSwipe({ offsetX: 0, isSwiping: false });
+	}, [swipe.offsetX, onDismiss]);
+
+	return {
+		offsetX: swipe.offsetX,
+		isSwiping: swipe.isSwiping,
+		handlers: { onTouchStart, onTouchMove, onTouchEnd },
+	};
+}

apps/web/src/index.css

@@ -0,0 +1,112 @@
+@import "tailwindcss";
+
+@theme {
+	--color-background: #0f172a;
+	--color-foreground: #e2e8f0;
+	--color-muted: #64748b;
+	--color-muted-foreground: #94a3b8;
+	--color-card: #1e293b;
+	--color-card-foreground: #e2e8f0;
+	--color-border: #334155;
+	--color-input: #334155;
+	--color-primary: #3b82f6;
+	--color-primary-foreground: #ffffff;
+	--color-accent: #3b82f6;
+	--color-destructive: #ef4444;
+	--color-hover-neutral: var(--color-primary);
+	--color-hover-action: var(--color-primary);
+	--color-hover-destructive: var(--color-destructive);
+	--color-hover-neutral-bg: var(--color-card);
+	--color-hover-action-bg: var(--color-muted);
+	--color-hover-destructive-bg: transparent;
+	--radius-sm: 0.25rem;
+	--radius-md: 0.375rem;
+	--radius-lg: 0.5rem;
+	--font-sans: "Inter", ui-sans-serif, system-ui, sans-serif;
+}
+
+@keyframes concentration-shake {
+	0% {
+		translate: 0;
+	}
+	20% {
+		translate: -3px;
+	}
+	40% {
+		translate: 3px;
+	}
+	60% {
+		translate: -2px;
+	}
+	80% {
+		translate: 1px;
+	}
+	100% {
+		translate: 0;
+	}
+}
+
+@keyframes concentration-glow {
+	0% {
+		box-shadow: 0 0 4px 2px #c084fc;
+	}
+	100% {
+		box-shadow: 0 0 0 0 transparent;
+	}
+}
+
+@keyframes slide-in-right {
+	from {
+		translate: 100%;
+	}
+	to {
+		translate: 0;
+	}
+}
+
+@utility animate-slide-in-right {
+	animation: slide-in-right 200ms ease-out;
+}
+
+@keyframes confirm-pulse {
+	0% {
+		scale: 1;
+	}
+	50% {
+		scale: 1.15;
+	}
+	100% {
+		scale: 1;
+	}
+}
+
+@custom-variant pointer-coarse (@media (pointer: coarse));
+
+@utility animate-confirm-pulse {
+	animation: confirm-pulse 300ms ease-out;
+}
+
+@utility transition-slide-panel {
+	transition: translate 200ms ease-out;
+}
+
+@utility writing-vertical-rl {
+	writing-mode: vertical-rl;
+}
+
+@utility animate-concentration-pulse {
+	animation:
+		concentration-shake 450ms ease-out,
+		concentration-glow 1200ms ease-out;
+}
+
+* {
+	scrollbar-color: var(--color-border) transparent;
+	scrollbar-width: thin;
+}
+
+body {
+	background-color: var(--color-background);
+	color: var(--color-foreground);
+	font-family: var(--font-sans);
+}

apps/web/src/lib/utils.ts

@@ -0,0 +1,6 @@
+import { type ClassValue, clsx } from "clsx";
+import { twMerge } from "tailwind-merge";
+
+export function cn(...inputs: ClassValue[]) {
+	return twMerge(clsx(inputs));
+}

apps/web/src/main.tsx

@@ -1,6 +1,7 @@
 import { StrictMode } from "react";
 import { createRoot } from "react-dom/client";
 import { App } from "./App";
+import "./index.css";
 
 const root = document.getElementById("root");
 if (root) {

apps/web/src/persistence/__tests__/encounter-storage.test.ts

@@ -0,0 +1,296 @@
+import {
+	combatantId,
+	createEncounter,
+	isDomainError,
+} from "@initiative/domain";
+import { beforeEach, describe, expect, it } from "vitest";
+import { loadEncounter, saveEncounter } from "../encounter-storage.js";
+
+const STORAGE_KEY = "initiative:encounter";
+
+function makeEncounter() {
+	const result = createEncounter(
+		[
+			{ id: combatantId("1"), name: "Aria", initiative: 18 },
+			{ id: combatantId("c-2"), name: "Brak", initiative: 12 },
+			{ id: combatantId("3"), name: "Cael" },
+		],
+		1,
+		3,
+	);
+	if (isDomainError(result)) throw new Error("Failed to create test encounter");
+	return result;
+}
+
+function createMockLocalStorage() {
+	const store = new Map<string, string>();
+	return {
+		getItem: (key: string) => store.get(key) ?? null,
+		setItem: (key: string, value: string) => store.set(key, value),
+		removeItem: (key: string) => store.delete(key),
+		clear: () => store.clear(),
+		get length() {
+			return store.size;
+		},
+		key: (_index: number) => null,
+	} as Storage;
+}
+
+beforeEach(() => {
+	Object.defineProperty(globalThis, "localStorage", {
+		value: createMockLocalStorage(),
+		writable: true,
+		configurable: true,
+	});
+});
+
+describe("saveEncounter", () => {
+	it("writes encounter to localStorage", () => {
+		const encounter = makeEncounter();
+		saveEncounter(encounter);
+		expect(localStorage.getItem(STORAGE_KEY)).not.toBeNull();
+	});
+});
+
+describe("loadEncounter", () => {
+	it("returns null when localStorage is empty", () => {
+		expect(loadEncounter()).toBeNull();
+	});
+
+	it("round-trip save/load preserves encounter state", () => {
+		const encounter = makeEncounter();
+		saveEncounter(encounter);
+		const loaded = loadEncounter();
+
+		expect(loaded).not.toBeNull();
+		expect(loaded?.combatants).toHaveLength(3);
+		expect(loaded?.activeIndex).toBe(1);
+		expect(loaded?.roundNumber).toBe(3);
+	});
+
+	it("round-trip preserves combatant IDs, names, and initiative values", () => {
+		const encounter = makeEncounter();
+		saveEncounter(encounter);
+		const loaded = loadEncounter();
+		expect(loaded).not.toBeNull();
+
+		expect(loaded?.combatants[0].id).toBe("1");
+		expect(loaded?.combatants[0].name).toBe("Aria");
+		expect(loaded?.combatants[0].initiative).toBe(18);
+
+		expect(loaded?.combatants[1].id).toBe("c-2");
+		expect(loaded?.combatants[1].name).toBe("Brak");
+		expect(loaded?.combatants[1].initiative).toBe(12);
+
+		expect(loaded?.combatants[2].id).toBe("3");
+		expect(loaded?.combatants[2].name).toBe("Cael");
+		expect(loaded?.combatants[2].initiative).toBeUndefined();
+	});
+
+	it("returns null for non-JSON strings", () => {
+		localStorage.setItem(STORAGE_KEY, "not json at all");
+		expect(loadEncounter()).toBeNull();
+	});
+
+	it("returns null for JSON missing required fields", () => {
+		localStorage.setItem(STORAGE_KEY, JSON.stringify({ foo: "bar" }));
+		expect(loadEncounter()).toBeNull();
+	});
+
+	it("returns empty encounter for cleared state (empty combatants)", () => {
+		localStorage.setItem(
+			STORAGE_KEY,
+			JSON.stringify({ combatants: [], activeIndex: 0, roundNumber: 1 }),
+		);
+		const result = loadEncounter();
+		expect(result).toEqual({
+			combatants: [],
+			activeIndex: 0,
+			roundNumber: 1,
+		});
+	});
+
+	it("returns null for out-of-bounds activeIndex", () => {
+		localStorage.setItem(
+			STORAGE_KEY,
+			JSON.stringify({
+				combatants: [{ id: "1", name: "Aria" }],
+				activeIndex: 5,
+				roundNumber: 1,
+			}),
+		);
+		expect(loadEncounter()).toBeNull();
+	});
+
+	// US3: Corrupt data scenarios
+	it("returns null for non-object JSON (string)", () => {
+		localStorage.setItem(STORAGE_KEY, JSON.stringify("hello"));
+		expect(loadEncounter()).toBeNull();
+	});
+
+	it("returns null for non-object JSON (number)", () => {
+		localStorage.setItem(STORAGE_KEY, JSON.stringify(42));
+		expect(loadEncounter()).toBeNull();
+	});
+
+	it("returns null for non-object JSON (array)", () => {
+		localStorage.setItem(STORAGE_KEY, JSON.stringify([1, 2, 3]));
+		expect(loadEncounter()).toBeNull();
+	});
+
+	it("returns null for non-object JSON (null)", () => {
+		localStorage.setItem(STORAGE_KEY, "null");
+		expect(loadEncounter()).toBeNull();
+	});
+
+	it("returns null when combatants is a string instead of array", () => {
+		localStorage.setItem(
+			STORAGE_KEY,
+			JSON.stringify({
+				combatants: "not-array",
+				activeIndex: 0,
+				roundNumber: 1,
+			}),
+		);
+		expect(loadEncounter()).toBeNull();
+	});
+
+	it("returns null when activeIndex is a string instead of number", () => {
+		localStorage.setItem(
+			STORAGE_KEY,
+			JSON.stringify({
+				combatants: [{ id: "1", name: "Aria" }],
+				activeIndex: "zero",
+				roundNumber: 1,
+			}),
+		);
+		expect(loadEncounter()).toBeNull();
+	});
+
+	it("returns null when combatant entry is missing id", () => {
+		localStorage.setItem(
+			STORAGE_KEY,
+			JSON.stringify({
+				combatants: [{ name: "Aria" }],
+				activeIndex: 0,
+				roundNumber: 1,
+			}),
+		);
+		expect(loadEncounter()).toBeNull();
+	});
+
+	it("returns null when combatant entry is missing name", () => {
+		localStorage.setItem(
+			STORAGE_KEY,
+			JSON.stringify({
+				combatants: [{ id: "1" }],
+				activeIndex: 0,
+				roundNumber: 1,
+			}),
+		);
+		expect(loadEncounter()).toBeNull();
+	});
+
+	it("returns null for negative roundNumber", () => {
+		localStorage.setItem(
+			STORAGE_KEY,
+			JSON.stringify({
+				combatants: [{ id: "1", name: "Aria" }],
+				activeIndex: 0,
+				roundNumber: -1,
+			}),
+		);
+		expect(loadEncounter()).toBeNull();
+	});
+
+	it("returns empty encounter for zero combatants (cleared state)", () => {
+		localStorage.setItem(
+			STORAGE_KEY,
+			JSON.stringify({ combatants: [], activeIndex: 0, roundNumber: 1 }),
+		);
+		const result = loadEncounter();
+		expect(result).toEqual({
+			combatants: [],
+			activeIndex: 0,
+			roundNumber: 1,
+		});
+	});
+
+	it("round-trip preserves combatant AC value", () => {
+		const result = createEncounter(
+			[{ id: combatantId("1"), name: "Aria", ac: 18 }],
+			0,
+			1,
+		);
+		if (isDomainError(result)) throw new Error("unreachable");
+		saveEncounter(result);
+		const loaded = loadEncounter();
+		expect(loaded?.combatants[0].ac).toBe(18);
+	});
+
+	it("round-trip preserves combatant without AC", () => {
+		const result = createEncounter(
+			[{ id: combatantId("1"), name: "Aria" }],
+			0,
+			1,
+		);
+		if (isDomainError(result)) throw new Error("unreachable");
+		saveEncounter(result);
+		const loaded = loadEncounter();
+		expect(loaded?.combatants[0].ac).toBeUndefined();
+	});
+
+	it("discards invalid AC values during rehydration", () => {
+		localStorage.setItem(
+			STORAGE_KEY,
+			JSON.stringify({
+				combatants: [
+					{ id: "1", name: "Neg", ac: -1 },
+					{ id: "2", name: "Float", ac: 3.5 },
+					{ id: "3", name: "Str", ac: "high" },
+				],
+				activeIndex: 0,
+				roundNumber: 1,
+			}),
+		);
+		const loaded = loadEncounter();
+		expect(loaded).not.toBeNull();
+		expect(loaded?.combatants[0].ac).toBeUndefined();
+		expect(loaded?.combatants[1].ac).toBeUndefined();
+		expect(loaded?.combatants[2].ac).toBeUndefined();
+	});
+
+	it("preserves AC of 0 during rehydration", () => {
+		localStorage.setItem(
+			STORAGE_KEY,
+			JSON.stringify({
+				combatants: [{ id: "1", name: "Aria", ac: 0 }],
+				activeIndex: 0,
+				roundNumber: 1,
+			}),
+		);
+		const loaded = loadEncounter();
+		expect(loaded?.combatants[0].ac).toBe(0);
+	});
+
+	it("saving after modifications persists the latest state", () => {
+		const encounter = makeEncounter();
+		saveEncounter(encounter);
+
+		const modified = createEncounter(
+			[
+				{ id: combatantId("1"), name: "Aria", initiative: 18 },
+				{ id: combatantId("c-2"), name: "Brak", initiative: 12 },
+			],
+			0,
+			5,
+		);
+		if (isDomainError(modified)) throw new Error("unreachable");
+
+		saveEncounter(modified);
+		const loaded = loadEncounter();
+
+		expect(loaded?.combatants).toHaveLength(2);
+		expect(loaded?.roundNumber).toBe(5);
+	});
+});

apps/web/src/persistence/encounter-storage.ts

@@ -0,0 +1,133 @@
+import {
+	type ConditionId,
+	combatantId,
+	createEncounter,
+	creatureId,
+	type Encounter,
+	isDomainError,
+	VALID_CONDITION_IDS,
+} from "@initiative/domain";
+
+const STORAGE_KEY = "initiative:encounter";
+
+export function saveEncounter(encounter: Encounter): void {
+	try {
+		localStorage.setItem(STORAGE_KEY, JSON.stringify(encounter));
+	} catch {
+		// Silently swallow errors (quota exceeded, storage unavailable)
+	}
+}
+
+function validateAc(value: unknown): number | undefined {
+	return typeof value === "number" && Number.isInteger(value) && value >= 0
+		? value
+		: undefined;
+}
+
+function validateConditions(value: unknown): ConditionId[] | undefined {
+	if (!Array.isArray(value)) return undefined;
+	const valid = value.filter(
+		(v): v is ConditionId =>
+			typeof v === "string" && VALID_CONDITION_IDS.has(v),
+	);
+	return valid.length > 0 ? valid : undefined;
+}
+
+function validateCreatureId(value: unknown) {
+	return typeof value === "string" && value.length > 0
+		? creatureId(value)
+		: undefined;
+}
+
+function validateHp(
+	rawMaxHp: unknown,
+	rawCurrentHp: unknown,
+): { maxHp: number; currentHp: number } | undefined {
+	if (
+		typeof rawMaxHp !== "number" ||
+		!Number.isInteger(rawMaxHp) ||
+		rawMaxHp < 1
+	) {
+		return undefined;
+	}
+	const validCurrentHp =
+		typeof rawCurrentHp === "number" &&
+		Number.isInteger(rawCurrentHp) &&
+		rawCurrentHp >= 0 &&
+		rawCurrentHp <= rawMaxHp;
+	return {
+		maxHp: rawMaxHp,
+		currentHp: validCurrentHp ? rawCurrentHp : rawMaxHp,
+	};
+}
+
+function rehydrateCombatant(c: unknown) {
+	const entry = c as Record<string, unknown>;
+	const base = {
+		id: combatantId(entry.id as string),
+		name: entry.name as string,
+		initiative:
+			typeof entry.initiative === "number" ? entry.initiative : undefined,
+	};
+
+	const shared = {
+		...base,
+		ac: validateAc(entry.ac),
+		conditions: validateConditions(entry.conditions),
+		isConcentrating: entry.isConcentrating === true ? true : undefined,
+		creatureId: validateCreatureId(entry.creatureId),
+	};
+
+	const hp = validateHp(entry.maxHp, entry.currentHp);
+	return hp ? { ...shared, ...hp } : shared;
+}
+
+function isValidCombatantEntry(c: unknown): boolean {
+	if (typeof c !== "object" || c === null || Array.isArray(c)) return false;
+	const entry = c as Record<string, unknown>;
+	return typeof entry.id === "string" && typeof entry.name === "string";
+}
+
+export function loadEncounter(): Encounter | null {
+	try {
+		const raw = localStorage.getItem(STORAGE_KEY);
+		if (raw === null) return null;
+
+		const parsed: unknown = JSON.parse(raw);
+
+		if (typeof parsed !== "object" || parsed === null || Array.isArray(parsed))
+			return null;
+
+		const obj = parsed as Record<string, unknown>;
+
+		if (!Array.isArray(obj.combatants)) return null;
+		if (typeof obj.activeIndex !== "number") return null;
+		if (typeof obj.roundNumber !== "number") return null;
+
+		const combatants = obj.combatants as unknown[];
+
+		// Handle empty encounter (cleared state) directly — createEncounter rejects empty arrays
+		if (combatants.length === 0) {
+			return {
+				combatants: [],
+				activeIndex: 0,
+				roundNumber: 1,
+			};
+		}
+
+		if (!combatants.every(isValidCombatantEntry)) return null;
+
+		const rehydrated = combatants.map(rehydrateCombatant);
+
+		const result = createEncounter(
+			rehydrated,
+			obj.activeIndex,
+			obj.roundNumber,
+		);
+		if (isDomainError(result)) return null;
+
+		return result;
+	} catch {
+		return null;
+	}
+}

apps/web/vite.config.ts

@@ -1,6 +1,7 @@
+import tailwindcss from "@tailwindcss/vite";
 import react from "@vitejs/plugin-react";
 import { defineConfig } from "vite";
 
 export default defineConfig({
-	plugins: [react()],
+	plugins: [tailwindcss(), react()],
 });

biome.json

@@ -6,7 +6,9 @@
 			"!**/dist/**",
 			"!.claude/**",
 			"!.specify/**",
-			"!specs/**"
+			"!specs/**",
+			"!coverage/**",
+			"!.pnpm-store/**"
 		]
 	},
 	"assist": {
@@ -27,7 +29,15 @@
 	"linter": {
 		"enabled": true,
 		"rules": {
-			"recommended": true
+			"recommended": true,
+			"complexity": {
+				"noExcessiveCognitiveComplexity": {
+					"level": "error",
+					"options": {
+						"maxAllowedComplexity": 15
+					}
+				}
+			}
 		}
 	}
 }

d20.svg

@@ -0,0 +1,19 @@
+<svg 
+  xmlns="http://www.w3.org/2000/svg" 
+  height="24"
+  width="24"
+  viewBox="0 0 24 24"
+  fill="none"
+  stroke="currentColor"
+  stroke-width="1"
+  stroke-linecap="round"
+  stroke-linejoin="round"
+>
+  <polygon points="20.22 16.76 20.22 7.26 12.04 2.51 3.85 7.26 3.85 16.76 12.04 21.51 20.22 16.76"/>
+  <line x1="7.29" y1="9.26" x2="3.85" y2="7.26"/>
+  <line x1="20.22" y1="7.26" x2="16.79" y2="9.26"/>
+  <line x1="12.04" y1="17.44" x2="12.04" y2="21.51"/>
+  <polygon points="12.04 17.44 20.22 16.76 16.79 9.26 12.04 17.44"/>
+  <polygon points="12.04 17.44 7.29 9.26 3.85 16.76 12.04 17.44"/>
+  <polygon points="12.04 2.51 7.29 9.26 16.79 9.26 12.04 2.51"/>
+</svg>

docs/agents/.gitkeep

@@ -0,0 +1,4 @@
+# Agent Artifacts
+
+Research reports and implementation plans generated by RPI skills.
+

knip.json

@@ -0,0 +1,10 @@
+{
+	"$schema": "https://unpkg.com/knip@5/schema.json",
+	"workspaces": {
+		".": {
+			"entry": ["scripts/*.mjs"]
+		},
+		"packages/*": {},
+		"apps/*": {}
+	}
+}

lefthook.yml

@@ -0,0 +1,4 @@
+pre-commit:
+  jobs:
+    - name: check
+      run: pnpm check

nginx.conf

@@ -0,0 +1,9 @@
+server {
+    listen 80;
+    root /usr/share/nginx/html;
+    index index.html;
+
+    location / {
+        try_files $uri $uri/ /index.html;
+    }
+}

package.json

@@ -3,10 +3,15 @@
 	"packageManager": "pnpm@10.6.0",
 	"devDependencies": {
 		"@biomejs/biome": "2.0.0",
+		"@vitest/coverage-v8": "^3.2.4",
+		"jscpd": "^4.0.8",
+		"knip": "^5.85.0",
+		"lefthook": "^1.11.0",
 		"typescript": "^5.8.0",
 		"vitest": "^3.0.0"
 	},
 	"scripts": {
+		"prepare": "lefthook install",
 		"format": "biome format --write .",
 		"format:check": "biome format .",
 		"lint": "biome lint .",
@@ -14,6 +19,8 @@
 		"typecheck": "tsc --build",
 		"test": "vitest run",
 		"test:watch": "vitest",
-		"check": "biome check . && tsc --build && vitest run"
+		"knip": "knip",
+		"jscpd": "jscpd",
+		"check": "pnpm audit --audit-level=high && knip && biome check . && tsc --build && vitest run && jscpd"
 	}
 }

packages/application/src/add-combatant-use-case.ts

@@ -0,0 +1,24 @@
+import {
+	addCombatant,
+	type CombatantId,
+	type DomainError,
+	type DomainEvent,
+	isDomainError,
+} from "@initiative/domain";
+import type { EncounterStore } from "./ports.js";
+
+export function addCombatantUseCase(
+	store: EncounterStore,
+	id: CombatantId,
+	name: string,
+): DomainEvent[] | DomainError {
+	const encounter = store.get();
+	const result = addCombatant(encounter, id, name);
+
+	if (isDomainError(result)) {
+		return result;
+	}
+
+	store.save(result.encounter);
+	return result.events;
+}

packages/application/src/adjust-hp-use-case.ts

@@ -0,0 +1,24 @@
+import {
+	adjustHp,
+	type CombatantId,
+	type DomainError,
+	type DomainEvent,
+	isDomainError,
+} from "@initiative/domain";
+import type { EncounterStore } from "./ports.js";
+
+export function adjustHpUseCase(
+	store: EncounterStore,
+	combatantId: CombatantId,
+	delta: number,
+): DomainEvent[] | DomainError {
+	const encounter = store.get();
+	const result = adjustHp(encounter, combatantId, delta);
+
+	if (isDomainError(result)) {
+		return result;
+	}
+
+	store.save(result.encounter);
+	return result.events;
+}

packages/application/src/advance-turn-use-case.ts

@@ -0,0 +1,21 @@
+import {
+	advanceTurn,
+	type DomainError,
+	type DomainEvent,
+	isDomainError,
+} from "@initiative/domain";
+import type { EncounterStore } from "./ports.js";
+
+export function advanceTurnUseCase(
+	store: EncounterStore,
+): DomainEvent[] | DomainError {
+	const encounter = store.get();
+	const result = advanceTurn(encounter);
+
+	if (isDomainError(result)) {
+		return result;
+	}
+
+	store.save(result.encounter);
+	return result.events;
+}

packages/application/src/clear-encounter-use-case.ts

@@ -0,0 +1,21 @@
+import {
+	clearEncounter,
+	type DomainError,
+	type DomainEvent,
+	isDomainError,
+} from "@initiative/domain";
+import type { EncounterStore } from "./ports.js";
+
+export function clearEncounterUseCase(
+	store: EncounterStore,
+): DomainEvent[] | DomainError {
+	const encounter = store.get();
+	const result = clearEncounter(encounter);
+
+	if (isDomainError(result)) {
+		return result;
+	}
+
+	store.save(result.encounter);
+	return result.events;
+}

packages/application/src/edit-combatant-use-case.ts

@@ -0,0 +1,24 @@
+import {
+	type CombatantId,
+	type DomainError,
+	type DomainEvent,
+	editCombatant,
+	isDomainError,
+} from "@initiative/domain";
+import type { EncounterStore } from "./ports.js";
+
+export function editCombatantUseCase(
+	store: EncounterStore,
+	id: CombatantId,
+	newName: string,
+): DomainEvent[] | DomainError {
+	const encounter = store.get();
+	const result = editCombatant(encounter, id, newName);
+
+	if (isDomainError(result)) {
+		return result;
+	}
+
+	store.save(result.encounter);
+	return result.events;
+}

packages/application/src/index.ts

@@ -1 +1,15 @@
-export {};
+export { addCombatantUseCase } from "./add-combatant-use-case.js";
+export { adjustHpUseCase } from "./adjust-hp-use-case.js";
+export { advanceTurnUseCase } from "./advance-turn-use-case.js";
+export { clearEncounterUseCase } from "./clear-encounter-use-case.js";
+export { editCombatantUseCase } from "./edit-combatant-use-case.js";
+export type { BestiarySourceCache, EncounterStore } from "./ports.js";
+export { removeCombatantUseCase } from "./remove-combatant-use-case.js";
+export { retreatTurnUseCase } from "./retreat-turn-use-case.js";
+export { rollAllInitiativeUseCase } from "./roll-all-initiative-use-case.js";
+export { rollInitiativeUseCase } from "./roll-initiative-use-case.js";
+export { setAcUseCase } from "./set-ac-use-case.js";
+export { setHpUseCase } from "./set-hp-use-case.js";
+export { setInitiativeUseCase } from "./set-initiative-use-case.js";
+export { toggleConcentrationUseCase } from "./toggle-concentration-use-case.js";
+export { toggleConditionUseCase } from "./toggle-condition-use-case.js";

packages/application/src/ports.ts

@@ -0,0 +1,11 @@
+import type { Creature, CreatureId, Encounter } from "@initiative/domain";
+
+export interface EncounterStore {
+	get(): Encounter;
+	save(encounter: Encounter): void;
+}
+
+export interface BestiarySourceCache {
+	getCreature(creatureId: CreatureId): Creature | undefined;
+	isSourceCached(sourceCode: string): boolean;
+}

packages/application/src/remove-combatant-use-case.ts

@@ -0,0 +1,23 @@
+import {
+	type CombatantId,
+	type DomainError,
+	type DomainEvent,
+	isDomainError,
+	removeCombatant,
+} from "@initiative/domain";
+import type { EncounterStore } from "./ports.js";
+
+export function removeCombatantUseCase(
+	store: EncounterStore,
+	id: CombatantId,
+): DomainEvent[] | DomainError {
+	const encounter = store.get();
+	const result = removeCombatant(encounter, id);
+
+	if (isDomainError(result)) {
+		return result;
+	}
+
+	store.save(result.encounter);
+	return result.events;
+}

packages/application/src/retreat-turn-use-case.ts

@@ -0,0 +1,21 @@
+import {
+	type DomainError,
+	type DomainEvent,
+	isDomainError,
+	retreatTurn,
+} from "@initiative/domain";
+import type { EncounterStore } from "./ports.js";
+
+export function retreatTurnUseCase(
+	store: EncounterStore,
+): DomainEvent[] | DomainError {
+	const encounter = store.get();
+	const result = retreatTurn(encounter);
+
+	if (isDomainError(result)) {
+		return result;
+	}
+
+	store.save(result.encounter);
+	return result.events;
+}

packages/application/src/roll-all-initiative-use-case.ts

@@ -0,0 +1,51 @@
+import {
+	type Creature,
+	type CreatureId,
+	calculateInitiative,
+	type DomainError,
+	type DomainEvent,
+	isDomainError,
+	rollInitiative,
+	setInitiative,
+} from "@initiative/domain";
+import type { EncounterStore } from "./ports.js";
+
+export function rollAllInitiativeUseCase(
+	store: EncounterStore,
+	rollDice: () => number,
+	getCreature: (id: CreatureId) => Creature | undefined,
+): DomainEvent[] | DomainError {
+	let encounter = store.get();
+	const allEvents: DomainEvent[] = [];
+
+	for (const combatant of encounter.combatants) {
+		if (!combatant.creatureId) continue;
+		if (combatant.initiative !== undefined) continue;
+
+		const creature = getCreature(combatant.creatureId);
+		if (!creature) continue;
+
+		const { modifier } = calculateInitiative({
+			dexScore: creature.abilities.dex,
+			cr: creature.cr,
+			initiativeProficiency: creature.initiativeProficiency,
+		});
+		const value = rollInitiative(rollDice(), modifier);
+
+		if (isDomainError(value)) {
+			return value;
+		}
+
+		const result = setInitiative(encounter, combatant.id, value);
+
+		if (isDomainError(result)) {
+			return result;
+		}
+
+		encounter = result.encounter;
+		allEvents.push(...result.events);
+	}
+
+	store.save(encounter);
+	return allEvents;
+}

packages/application/src/roll-initiative-use-case.ts

@@ -0,0 +1,67 @@
+import {
+	type CombatantId,
+	type Creature,
+	type CreatureId,
+	calculateInitiative,
+	type DomainError,
+	type DomainEvent,
+	isDomainError,
+	rollInitiative,
+	setInitiative,
+} from "@initiative/domain";
+import type { EncounterStore } from "./ports.js";
+
+export function rollInitiativeUseCase(
+	store: EncounterStore,
+	combatantId: CombatantId,
+	diceRoll: number,
+	getCreature: (id: CreatureId) => Creature | undefined,
+): DomainEvent[] | DomainError {
+	const encounter = store.get();
+	const combatant = encounter.combatants.find((c) => c.id === combatantId);
+
+	if (!combatant) {
+		return {
+			kind: "domain-error",
+			code: "combatant-not-found",
+			message: `No combatant found with ID "${combatantId}"`,
+		};
+	}
+
+	if (!combatant.creatureId) {
+		return {
+			kind: "domain-error",
+			code: "no-creature-link",
+			message: `Combatant "${combatant.name}" has no linked creature`,
+		};
+	}
+
+	const creature = getCreature(combatant.creatureId);
+	if (!creature) {
+		return {
+			kind: "domain-error",
+			code: "creature-not-found",
+			message: `Creature not found for ID "${combatant.creatureId}"`,
+		};
+	}
+
+	const { modifier } = calculateInitiative({
+		dexScore: creature.abilities.dex,
+		cr: creature.cr,
+		initiativeProficiency: creature.initiativeProficiency,
+	});
+	const value = rollInitiative(diceRoll, modifier);
+
+	if (isDomainError(value)) {
+		return value;
+	}
+
+	const result = setInitiative(encounter, combatantId, value);
+
+	if (isDomainError(result)) {
+		return result;
+	}
+
+	store.save(result.encounter);
+	return result.events;
+}

packages/application/src/set-ac-use-case.ts

@@ -0,0 +1,24 @@
+import {
+	type CombatantId,
+	type DomainError,
+	type DomainEvent,
+	isDomainError,
+	setAc,
+} from "@initiative/domain";
+import type { EncounterStore } from "./ports.js";
+
+export function setAcUseCase(
+	store: EncounterStore,
+	combatantId: CombatantId,
+	value: number | undefined,
+): DomainEvent[] | DomainError {
+	const encounter = store.get();
+	const result = setAc(encounter, combatantId, value);
+
+	if (isDomainError(result)) {
+		return result;
+	}
+
+	store.save(result.encounter);
+	return result.events;
+}

packages/application/src/set-hp-use-case.ts

@@ -0,0 +1,24 @@
+import {
+	type CombatantId,
+	type DomainError,
+	type DomainEvent,
+	isDomainError,
+	setHp,
+} from "@initiative/domain";
+import type { EncounterStore } from "./ports.js";
+
+export function setHpUseCase(
+	store: EncounterStore,
+	combatantId: CombatantId,
+	maxHp: number | undefined,
+): DomainEvent[] | DomainError {
+	const encounter = store.get();
+	const result = setHp(encounter, combatantId, maxHp);
+
+	if (isDomainError(result)) {
+		return result;
+	}
+
+	store.save(result.encounter);
+	return result.events;
+}

packages/application/src/set-initiative-use-case.ts

@@ -0,0 +1,24 @@
+import {
+	type CombatantId,
+	type DomainError,
+	type DomainEvent,
+	isDomainError,
+	setInitiative,
+} from "@initiative/domain";
+import type { EncounterStore } from "./ports.js";
+
+export function setInitiativeUseCase(
+	store: EncounterStore,
+	combatantId: CombatantId,
+	value: number | undefined,
+): DomainEvent[] | DomainError {
+	const encounter = store.get();
+	const result = setInitiative(encounter, combatantId, value);
+
+	if (isDomainError(result)) {
+		return result;
+	}
+
+	store.save(result.encounter);
+	return result.events;
+}

packages/application/src/toggle-concentration-use-case.ts

@@ -0,0 +1,23 @@
+import {
+	type CombatantId,
+	type DomainError,
+	type DomainEvent,
+	isDomainError,
+	toggleConcentration,
+} from "@initiative/domain";
+import type { EncounterStore } from "./ports.js";
+
+export function toggleConcentrationUseCase(
+	store: EncounterStore,
+	combatantId: CombatantId,
+): DomainEvent[] | DomainError {
+	const encounter = store.get();
+	const result = toggleConcentration(encounter, combatantId);
+
+	if (isDomainError(result)) {
+		return result;
+	}
+
+	store.save(result.encounter);
+	return result.events;
+}

packages/application/src/toggle-condition-use-case.ts

@@ -0,0 +1,25 @@
+import {
+	type CombatantId,
+	type ConditionId,
+	type DomainError,
+	type DomainEvent,
+	isDomainError,
+	toggleCondition,
+} from "@initiative/domain";
+import type { EncounterStore } from "./ports.js";
+
+export function toggleConditionUseCase(
+	store: EncounterStore,
+	combatantId: CombatantId,
+	conditionId: ConditionId,
+): DomainEvent[] | DomainError {
+	const encounter = store.get();
+	const result = toggleCondition(encounter, combatantId, conditionId);
+
+	if (isDomainError(result)) {
+		return result;
+	}
+
+	store.save(result.encounter);
+	return result.events;
+}

packages/domain/src/__tests__/add-combatant.test.ts

@@ -0,0 +1,200 @@
+import { describe, expect, it } from "vitest";
+import { addCombatant } from "../add-combatant.js";
+import type { Combatant, Encounter } from "../types.js";
+import { combatantId, isDomainError } from "../types.js";
+
+// --- Helpers ---
+
+function makeCombatant(name: string): Combatant {
+	return { id: combatantId(name), name };
+}
+
+const A = makeCombatant("A");
+const B = makeCombatant("B");
+const C = makeCombatant("C");
+
+function enc(
+	combatants: Combatant[],
+	activeIndex = 0,
+	roundNumber = 1,
+): Encounter {
+	return { combatants, activeIndex, roundNumber };
+}
+
+function successResult(encounter: Encounter, id: string, name: string) {
+	const result = addCombatant(encounter, combatantId(id), name);
+	if (isDomainError(result)) {
+		throw new Error(`Expected success, got error: ${result.message}`);
+	}
+	return result;
+}
+
+// --- Acceptance Scenarios ---
+
+describe("addCombatant", () => {
+	describe("acceptance scenarios", () => {
+		it("scenario 1: add to empty encounter", () => {
+			const e = enc([], 0, 1);
+			const { encounter, events } = successResult(e, "gandalf", "Gandalf");
+
+			expect(encounter.combatants).toEqual([
+				{ id: combatantId("gandalf"), name: "Gandalf" },
+			]);
+			expect(encounter.activeIndex).toBe(0);
+			expect(encounter.roundNumber).toBe(1);
+			expect(events).toEqual([
+				{
+					type: "CombatantAdded",
+					combatantId: combatantId("gandalf"),
+					name: "Gandalf",
+					position: 0,
+				},
+			]);
+		});
+
+		it("scenario 2: add to encounter with [A, B]", () => {
+			const e = enc([A, B], 0, 1);
+			const { encounter, events } = successResult(e, "C", "C");
+
+			expect(encounter.combatants).toEqual([
+				A,
+				B,
+				{ id: combatantId("C"), name: "C" },
+			]);
+			expect(encounter.activeIndex).toBe(0);
+			expect(encounter.roundNumber).toBe(1);
+			expect(events).toEqual([
+				{
+					type: "CombatantAdded",
+					combatantId: combatantId("C"),
+					name: "C",
+					position: 2,
+				},
+			]);
+		});
+
+		it("scenario 3: add during mid-round does not change active combatant", () => {
+			const e = enc([A, B, C], 2, 3);
+			const { encounter, events } = successResult(e, "D", "D");
+
+			expect(encounter.combatants).toHaveLength(4);
+			expect(encounter.combatants[3]).toEqual({
+				id: combatantId("D"),
+				name: "D",
+			});
+			expect(encounter.activeIndex).toBe(2);
+			expect(encounter.roundNumber).toBe(3);
+			expect(events).toEqual([
+				{
+					type: "CombatantAdded",
+					combatantId: combatantId("D"),
+					name: "D",
+					position: 3,
+				},
+			]);
+		});
+
+		it("scenario 4: two sequential adds preserve order", () => {
+			const e = enc([A]);
+			const first = successResult(e, "B", "B");
+			const second = successResult(first.encounter, "C", "C");
+
+			expect(second.encounter.combatants).toEqual([
+				A,
+				{ id: combatantId("B"), name: "B" },
+				{ id: combatantId("C"), name: "C" },
+			]);
+			expect(first.events).toHaveLength(1);
+			expect(second.events).toHaveLength(1);
+		});
+
+		it("scenario 5: empty name returns error", () => {
+			const e = enc([A, B]);
+			const result = addCombatant(e, combatantId("x"), "");
+
+			expect(isDomainError(result)).toBe(true);
+			if (isDomainError(result)) {
+				expect(result.code).toBe("invalid-name");
+			}
+		});
+
+		it("scenario 6: whitespace-only name returns error", () => {
+			const e = enc([A, B]);
+			const result = addCombatant(e, combatantId("x"), "   ");
+
+			expect(isDomainError(result)).toBe(true);
+			if (isDomainError(result)) {
+				expect(result.code).toBe("invalid-name");
+			}
+		});
+	});
+
+	describe("invariants", () => {
+		it("INV-1: encounter may have zero combatants (adding to empty is valid)", () => {
+			const e = enc([]);
+			const result = addCombatant(e, combatantId("a"), "A");
+			expect(isDomainError(result)).toBe(false);
+		});
+
+		it("INV-2: activeIndex remains valid after adding", () => {
+			const scenarios: Encounter[] = [
+				enc([], 0, 1),
+				enc([A], 0, 1),
+				enc([A, B, C], 2, 3),
+			];
+
+			for (const e of scenarios) {
+				const result = successResult(e, "new", "New");
+				const { combatants, activeIndex } = result.encounter;
+				if (combatants.length > 0) {
+					expect(activeIndex).toBeGreaterThanOrEqual(0);
+					expect(activeIndex).toBeLessThan(combatants.length);
+				} else {
+					expect(activeIndex).toBe(0);
+				}
+			}
+		});
+
+		it("INV-3: roundNumber is preserved (never decreases)", () => {
+			const e = enc([A, B], 1, 5);
+			const { encounter } = successResult(e, "C", "C");
+			expect(encounter.roundNumber).toBe(5);
+		});
+
+		it("INV-4: determinism — same input produces same output", () => {
+			const e = enc([A, B], 1, 3);
+			const result1 = addCombatant(e, combatantId("x"), "X");
+			const result2 = addCombatant(e, combatantId("x"), "X");
+			expect(result1).toEqual(result2);
+		});
+
+		it("INV-5: every success emits exactly one CombatantAdded event", () => {
+			const scenarios: Encounter[] = [enc([]), enc([A]), enc([A, B, C], 2, 5)];
+
+			for (const e of scenarios) {
+				const result = successResult(e, "z", "Z");
+				expect(result.events).toHaveLength(1);
+				expect(result.events[0].type).toBe("CombatantAdded");
+			}
+		});
+
+		it("INV-6: addCombatant does not change activeIndex or roundNumber", () => {
+			const e = enc([A, B, C], 2, 7);
+			const { encounter } = successResult(e, "D", "D");
+			expect(encounter.activeIndex).toBe(2);
+			expect(encounter.roundNumber).toBe(7);
+		});
+
+		it("INV-7: new combatant is always appended at the end", () => {
+			const e = enc([A, B]);
+			const { encounter } = successResult(e, "C", "C");
+			expect(encounter.combatants[encounter.combatants.length - 1]).toEqual({
+				id: combatantId("C"),
+				name: "C",
+			});
+			// Existing combatants preserve order
+			expect(encounter.combatants[0]).toEqual(A);
+			expect(encounter.combatants[1]).toEqual(B);
+		});
+	});
+});

packages/domain/src/__tests__/adjust-hp.test.ts

@@ -0,0 +1,166 @@
+import { describe, expect, it } from "vitest";
+import { adjustHp } from "../adjust-hp.js";
+import type { Combatant, Encounter } from "../types.js";
+import { combatantId, isDomainError } from "../types.js";
+
+function makeCombatant(
+	name: string,
+	opts?: { maxHp: number; currentHp: number },
+): Combatant {
+	return {
+		id: combatantId(name),
+		name,
+		...(opts ? { maxHp: opts.maxHp, currentHp: opts.currentHp } : {}),
+	};
+}
+
+function enc(combatants: Combatant[]): Encounter {
+	return { combatants, activeIndex: 0, roundNumber: 1 };
+}
+
+function successResult(encounter: Encounter, id: string, delta: number) {
+	const result = adjustHp(encounter, combatantId(id), delta);
+	if (isDomainError(result)) {
+		throw new Error(`Expected success, got error: ${result.message}`);
+	}
+	return result;
+}
+
+describe("adjustHp", () => {
+	describe("acceptance scenarios", () => {
+		it("+1 increases currentHp by 1", () => {
+			const e = enc([makeCombatant("A", { maxHp: 20, currentHp: 15 })]);
+			const { encounter } = successResult(e, "A", 1);
+			expect(encounter.combatants[0].currentHp).toBe(16);
+		});
+
+		it("-1 decreases currentHp by 1", () => {
+			const e = enc([makeCombatant("A", { maxHp: 20, currentHp: 15 })]);
+			const { encounter } = successResult(e, "A", -1);
+			expect(encounter.combatants[0].currentHp).toBe(14);
+		});
+
+		it("clamps at 0 — cannot go below zero", () => {
+			const e = enc([makeCombatant("A", { maxHp: 20, currentHp: 3 })]);
+			const { encounter } = successResult(e, "A", -10);
+			expect(encounter.combatants[0].currentHp).toBe(0);
+		});
+
+		it("clamps at maxHp — cannot exceed max", () => {
+			const e = enc([makeCombatant("A", { maxHp: 20, currentHp: 18 })]);
+			const { encounter } = successResult(e, "A", 10);
+			expect(encounter.combatants[0].currentHp).toBe(20);
+		});
+	});
+
+	describe("invariants", () => {
+		it("is pure — same input produces same output", () => {
+			const e = enc([makeCombatant("A", { maxHp: 20, currentHp: 10 })]);
+			const r1 = adjustHp(e, combatantId("A"), -5);
+			const r2 = adjustHp(e, combatantId("A"), -5);
+			expect(r1).toEqual(r2);
+		});
+
+		it("does not mutate input encounter", () => {
+			const e = enc([makeCombatant("A", { maxHp: 20, currentHp: 10 })]);
+			const original = JSON.parse(JSON.stringify(e));
+			adjustHp(e, combatantId("A"), -3);
+			expect(e).toEqual(original);
+		});
+
+		it("emits CurrentHpAdjusted event with delta", () => {
+			const e = enc([makeCombatant("A", { maxHp: 20, currentHp: 15 })]);
+			const { events } = successResult(e, "A", -5);
+			expect(events).toEqual([
+				{
+					type: "CurrentHpAdjusted",
+					combatantId: combatantId("A"),
+					previousHp: 15,
+					newHp: 10,
+					delta: -5,
+				},
+			]);
+		});
+
+		it("preserves activeIndex and roundNumber", () => {
+			const e = {
+				combatants: [
+					makeCombatant("A", { maxHp: 20, currentHp: 10 }),
+					makeCombatant("B"),
+				],
+				activeIndex: 1,
+				roundNumber: 5,
+			};
+			const { encounter } = successResult(e, "A", -3);
+			expect(encounter.activeIndex).toBe(1);
+			expect(encounter.roundNumber).toBe(5);
+		});
+	});
+
+	describe("error cases", () => {
+		it("returns error for nonexistent combatant", () => {
+			const e = enc([makeCombatant("A", { maxHp: 20, currentHp: 10 })]);
+			const result = adjustHp(e, combatantId("Z"), -1);
+			expect(isDomainError(result)).toBe(true);
+			if (isDomainError(result)) {
+				expect(result.code).toBe("combatant-not-found");
+			}
+		});
+
+		it("returns error when combatant has no HP tracking", () => {
+			const e = enc([makeCombatant("A")]);
+			const result = adjustHp(e, combatantId("A"), -1);
+			expect(isDomainError(result)).toBe(true);
+			if (isDomainError(result)) {
+				expect(result.code).toBe("no-hp-tracking");
+			}
+		});
+
+		it("returns error for zero delta", () => {
+			const e = enc([makeCombatant("A", { maxHp: 20, currentHp: 10 })]);
+			const result = adjustHp(e, combatantId("A"), 0);
+			expect(isDomainError(result)).toBe(true);
+			if (isDomainError(result)) {
+				expect(result.code).toBe("zero-delta");
+			}
+		});
+
+		it("returns error for non-integer delta", () => {
+			const e = enc([makeCombatant("A", { maxHp: 20, currentHp: 10 })]);
+			const result = adjustHp(e, combatantId("A"), 1.5);
+			expect(isDomainError(result)).toBe(true);
+			if (isDomainError(result)) {
+				expect(result.code).toBe("invalid-delta");
+			}
+		});
+	});
+
+	describe("edge cases", () => {
+		it("large negative delta beyond currentHp clamps to 0", () => {
+			const e = enc([makeCombatant("A", { maxHp: 100, currentHp: 50 })]);
+			const { encounter } = successResult(e, "A", -9999);
+			expect(encounter.combatants[0].currentHp).toBe(0);
+		});
+
+		it("large positive delta beyond maxHp clamps to maxHp", () => {
+			const e = enc([makeCombatant("A", { maxHp: 100, currentHp: 50 })]);
+			const { encounter } = successResult(e, "A", 9999);
+			expect(encounter.combatants[0].currentHp).toBe(100);
+		});
+
+		it("does not affect other combatants", () => {
+			const e = enc([
+				makeCombatant("A", { maxHp: 20, currentHp: 15 }),
+				makeCombatant("B", { maxHp: 30, currentHp: 25 }),
+			]);
+			const { encounter } = successResult(e, "A", -5);
+			expect(encounter.combatants[1].currentHp).toBe(25);
+		});
+
+		it("adjusting from 0 upward works", () => {
+			const e = enc([makeCombatant("A", { maxHp: 20, currentHp: 0 })]);
+			const { encounter } = successResult(e, "A", 5);
+			expect(encounter.combatants[0].currentHp).toBe(5);
+		});
+	});
+});

packages/domain/src/__tests__/auto-number.test.ts

@@ -0,0 +1,49 @@
+import { describe, expect, it } from "vitest";
+import { resolveCreatureName } from "../auto-number.js";
+
+describe("resolveCreatureName", () => {
+	it("returns name as-is when no conflict exists", () => {
+		const result = resolveCreatureName("Goblin", ["Orc", "Dragon"]);
+		expect(result).toEqual({ newName: "Goblin", renames: [] });
+	});
+
+	it("returns name as-is when existing list is empty", () => {
+		const result = resolveCreatureName("Goblin", []);
+		expect(result).toEqual({ newName: "Goblin", renames: [] });
+	});
+
+	it("renames existing to 'Name 1' and new to 'Name 2' on first conflict", () => {
+		const result = resolveCreatureName("Goblin", ["Orc", "Goblin", "Dragon"]);
+		expect(result).toEqual({
+			newName: "Goblin 2",
+			renames: [{ from: "Goblin", to: "Goblin 1" }],
+		});
+	});
+
+	it("appends next number when numbered variants already exist", () => {
+		const result = resolveCreatureName("Goblin", ["Goblin 1", "Goblin 2"]);
+		expect(result).toEqual({ newName: "Goblin 3", renames: [] });
+	});
+
+	it("handles mixed exact and numbered matches", () => {
+		const result = resolveCreatureName("Goblin", [
+			"Goblin",
+			"Goblin 1",
+			"Goblin 2",
+		]);
+		expect(result).toEqual({ newName: "Goblin 3", renames: [] });
+	});
+
+	it("handles names with special regex characters", () => {
+		const result = resolveCreatureName("Goblin (Boss)", ["Goblin (Boss)"]);
+		expect(result).toEqual({
+			newName: "Goblin (Boss) 2",
+			renames: [{ from: "Goblin (Boss)", to: "Goblin (Boss) 1" }],
+		});
+	});
+
+	it("does not match partial name overlaps", () => {
+		const result = resolveCreatureName("Goblin", ["Goblin Boss"]);
+		expect(result).toEqual({ newName: "Goblin", renames: [] });
+	});
+});

packages/domain/src/__tests__/clear-encounter.test.ts

@@ -0,0 +1,114 @@
+import { describe, expect, it } from "vitest";
+import { clearEncounter } from "../clear-encounter.js";
+import type { DomainError, Encounter } from "../types.js";
+import { combatantId, createEncounter, isDomainError } from "../types.js";
+
+function makeEncounter(
+	count: number,
+	overrides?: Partial<Encounter>,
+): Encounter {
+	const combatants = Array.from({ length: count }, (_, i) => ({
+		id: combatantId(`c-${i + 1}`),
+		name: `Combatant ${i + 1}`,
+	}));
+
+	const result = createEncounter(combatants);
+	if (isDomainError(result)) {
+		throw new Error("Failed to create encounter in test helper");
+	}
+
+	return { ...result, ...overrides };
+}
+
+describe("clearEncounter", () => {
+	it("clears encounter with multiple combatants at round 3 — returns empty encounter with roundNumber 1 and activeIndex 0", () => {
+		const encounter = makeEncounter(4, { roundNumber: 3, activeIndex: 2 });
+
+		const result = clearEncounter(encounter);
+
+		expect(isDomainError(result)).toBe(false);
+		const success = result as Exclude<typeof result, DomainError>;
+		expect(success.encounter.combatants).toEqual([]);
+		expect(success.encounter.roundNumber).toBe(1);
+		expect(success.encounter.activeIndex).toBe(0);
+	});
+
+	it("clears encounter with a single combatant", () => {
+		const encounter = makeEncounter(1);
+
+		const result = clearEncounter(encounter);
+
+		expect(isDomainError(result)).toBe(false);
+		const success = result as Exclude<typeof result, DomainError>;
+		expect(success.encounter.combatants).toEqual([]);
+		expect(success.encounter.activeIndex).toBe(0);
+		expect(success.encounter.roundNumber).toBe(1);
+	});
+
+	it("clears encounter with combatants that have HP/AC/conditions/concentration", () => {
+		const encounter: Encounter = {
+			combatants: [
+				{
+					id: combatantId("c-1"),
+					name: "Fighter",
+					maxHp: 50,
+					currentHp: 30,
+					ac: 18,
+					conditions: ["blinded", "poisoned"],
+					isConcentrating: true,
+				},
+				{
+					id: combatantId("c-2"),
+					name: "Wizard",
+					maxHp: 25,
+					currentHp: 0,
+					ac: 12,
+					conditions: ["unconscious"],
+				},
+			],
+			activeIndex: 0,
+			roundNumber: 5,
+		};
+
+		const result = clearEncounter(encounter);
+
+		expect(isDomainError(result)).toBe(false);
+		const success = result as Exclude<typeof result, DomainError>;
+		expect(success.encounter.combatants).toEqual([]);
+	});
+
+	it("returns DomainError with code 'encounter-already-empty' when encounter has no combatants", () => {
+		const encounter: Encounter = {
+			combatants: [],
+			activeIndex: 0,
+			roundNumber: 1,
+		};
+
+		const result = clearEncounter(encounter);
+
+		expect(isDomainError(result)).toBe(true);
+		const error = result as DomainError;
+		expect(error.code).toBe("encounter-already-empty");
+	});
+
+	it("emits EncounterCleared event with correct combatantCount", () => {
+		const encounter = makeEncounter(3);
+
+		const result = clearEncounter(encounter);
+
+		expect(isDomainError(result)).toBe(false);
+		const success = result as Exclude<typeof result, DomainError>;
+		expect(success.events).toEqual([
+			{ type: "EncounterCleared", combatantCount: 3 },
+		]);
+	});
+
+	it("is deterministic — same input always produces same output", () => {
+		const encounter = makeEncounter(2, { roundNumber: 4, activeIndex: 1 });
+
+		const result1 = clearEncounter(encounter);
+		const result2 = clearEncounter(encounter);
+
+		expect(result1).toEqual(result2);
+	});
+});

packages/domain/src/__tests__/edit-combatant.test.ts

@@ -0,0 +1,163 @@
+import { describe, expect, it } from "vitest";
+import { editCombatant } from "../edit-combatant.js";
+import type { Combatant, Encounter } from "../types.js";
+import { combatantId, isDomainError } from "../types.js";
+
+// --- Helpers ---
+
+function makeCombatant(name: string): Combatant {
+	return { id: combatantId(name), name };
+}
+
+const Alice = makeCombatant("Alice");
+const Bob = makeCombatant("Bob");
+
+function enc(
+	combatants: Combatant[],
+	activeIndex = 0,
+	roundNumber = 1,
+): Encounter {
+	return { combatants, activeIndex, roundNumber };
+}
+
+function successResult(encounter: Encounter, id: string, newName: string) {
+	const result = editCombatant(encounter, combatantId(id), newName);
+	if (isDomainError(result)) {
+		throw new Error(`Expected success, got error: ${result.message}`);
+	}
+	return result;
+}
+
+// --- Acceptance Scenarios (T004) ---
+
+describe("editCombatant", () => {
+	describe("acceptance scenarios", () => {
+		it("scenario 1: rename succeeds with correct event containing combatantId, oldName, newName", () => {
+			const e = enc([Alice, Bob]);
+			const { encounter, events } = successResult(e, "Bob", "Robert");
+
+			expect(encounter.combatants[1]).toEqual({
+				id: combatantId("Bob"),
+				name: "Robert",
+			});
+			expect(events).toEqual([
+				{
+					type: "CombatantUpdated",
+					combatantId: combatantId("Bob"),
+					oldName: "Bob",
+					newName: "Robert",
+				},
+			]);
+		});
+
+		it("scenario 2: activeIndex and roundNumber preserved when renaming the active combatant", () => {
+			const e = enc([Alice, Bob], 1, 3);
+			const { encounter } = successResult(e, "Bob", "Robert");
+
+			expect(encounter.activeIndex).toBe(1);
+			expect(encounter.roundNumber).toBe(3);
+			expect(encounter.combatants[1].name).toBe("Robert");
+		});
+
+		it("scenario 3: combatant list order preserved", () => {
+			const Cael = makeCombatant("Cael");
+			const e = enc([Alice, Bob, Cael]);
+			const { encounter } = successResult(e, "Bob", "Robert");
+
+			expect(encounter.combatants.map((c) => c.name)).toEqual([
+				"Alice",
+				"Robert",
+				"Cael",
+			]);
+		});
+
+		it("scenario 4: renaming to same name still emits event", () => {
+			const e = enc([Alice, Bob]);
+			const { encounter, events } = successResult(e, "Bob", "Bob");
+
+			expect(encounter.combatants[1].name).toBe("Bob");
+			expect(events).toHaveLength(1);
+			expect(events[0]).toEqual({
+				type: "CombatantUpdated",
+				combatantId: combatantId("Bob"),
+				oldName: "Bob",
+				newName: "Bob",
+			});
+		});
+	});
+
+	// --- Invariant Tests (T005) ---
+
+	describe("invariants", () => {
+		it("INV-1: determinism — same inputs produce same outputs", () => {
+			const e = enc([Alice, Bob], 1, 3);
+			const result1 = editCombatant(e, combatantId("Alice"), "Aria");
+			const result2 = editCombatant(e, combatantId("Alice"), "Aria");
+			expect(result1).toEqual(result2);
+		});
+
+		it("INV-2: exactly one event emitted on success", () => {
+			const e = enc([Alice, Bob]);
+			const { events } = successResult(e, "Alice", "Aria");
+			expect(events).toHaveLength(1);
+			expect(events[0].type).toBe("CombatantUpdated");
+		});
+
+		it("INV-3: original encounter is not mutated", () => {
+			const e = enc([Alice, Bob], 0, 1);
+			const originalCombatants = [...e.combatants];
+			const originalActiveIndex = e.activeIndex;
+			const originalRoundNumber = e.roundNumber;
+
+			successResult(e, "Alice", "Aria");
+
+			expect(e.combatants).toEqual(originalCombatants);
+			expect(e.activeIndex).toBe(originalActiveIndex);
+			expect(e.roundNumber).toBe(originalRoundNumber);
+		});
+	});
+
+	// --- Error Scenarios (T011) ---
+
+	describe("error scenarios", () => {
+		it("non-existent id returns combatant-not-found error", () => {
+			const e = enc([Alice, Bob]);
+			const result = editCombatant(e, combatantId("nonexistent"), "NewName");
+
+			expect(isDomainError(result)).toBe(true);
+			if (isDomainError(result)) {
+				expect(result.code).toBe("combatant-not-found");
+			}
+		});
+
+		it("empty name returns invalid-name error", () => {
+			const e = enc([Alice, Bob]);
+			const result = editCombatant(e, combatantId("Alice"), "");
+
+			expect(isDomainError(result)).toBe(true);
+			if (isDomainError(result)) {
+				expect(result.code).toBe("invalid-name");
+			}
+		});
+
+		it("whitespace-only name returns invalid-name error", () => {
+			const e = enc([Alice, Bob]);
+			const result = editCombatant(e, combatantId("Alice"), "   ");
+
+			expect(isDomainError(result)).toBe(true);
+			if (isDomainError(result)) {
+				expect(result.code).toBe("invalid-name");
+			}
+		});
+
+		it("empty encounter returns combatant-not-found for any id", () => {
+			const e = enc([]);
+			const result = editCombatant(e, combatantId("any"), "Name");
+
+			expect(isDomainError(result)).toBe(true);
+			if (isDomainError(result)) {
+				expect(result.code).toBe("combatant-not-found");
+			}
+		});
+	});
+});

packages/domain/src/__tests__/hp-status.test.ts

@@ -0,0 +1,55 @@
+import { describe, expect, it } from "vitest";
+import { deriveHpStatus } from "../hp-status.js";
+
+describe("deriveHpStatus", () => {
+	it("returns healthy when currentHp >= maxHp / 2", () => {
+		expect(deriveHpStatus(10, 20)).toBe("healthy");
+		expect(deriveHpStatus(15, 20)).toBe("healthy");
+		expect(deriveHpStatus(20, 20)).toBe("healthy");
+	});
+
+	it("returns bloodied when 0 < currentHp < maxHp / 2", () => {
+		expect(deriveHpStatus(9, 20)).toBe("bloodied");
+		expect(deriveHpStatus(1, 20)).toBe("bloodied");
+		expect(deriveHpStatus(5, 20)).toBe("bloodied");
+	});
+
+	it("returns unconscious when currentHp <= 0", () => {
+		expect(deriveHpStatus(0, 20)).toBe("unconscious");
+	});
+
+	it("returns unconscious with negative HP", () => {
+		expect(deriveHpStatus(-5, 20)).toBe("unconscious");
+	});
+
+	it("returns undefined when maxHp is undefined", () => {
+		expect(deriveHpStatus(10, undefined)).toBeUndefined();
+	});
+
+	it("returns undefined when currentHp is undefined", () => {
+		expect(deriveHpStatus(undefined, 20)).toBeUndefined();
+	});
+
+	it("returns undefined when both are undefined", () => {
+		expect(deriveHpStatus(undefined, undefined)).toBeUndefined();
+	});
+
+	it("handles maxHp=1 (no bloodied state possible)", () => {
+		expect(deriveHpStatus(1, 1)).toBe("healthy");
+		expect(deriveHpStatus(0, 1)).toBe("unconscious");
+	});
+
+	it("handles maxHp=2 (1/2 is healthy, not bloodied)", () => {
+		expect(deriveHpStatus(1, 2)).toBe("healthy");
+		expect(deriveHpStatus(0, 2)).toBe("unconscious");
+	});
+
+	it("handles odd maxHp=21 (10 is bloodied since 10 < 10.5)", () => {
+		expect(deriveHpStatus(10, 21)).toBe("bloodied");
+		expect(deriveHpStatus(11, 21)).toBe("healthy");
+	});
+
+	it("returns healthy when currentHp exceeds maxHp", () => {
+		expect(deriveHpStatus(25, 20)).toBe("healthy");
+	});
+});

packages/domain/src/__tests__/initiative.test.ts

@@ -0,0 +1,108 @@
+import { describe, expect, it } from "vitest";
+import {
+	calculateInitiative,
+	formatInitiativeModifier,
+} from "../initiative.js";
+
+describe("calculateInitiative", () => {
+	it("returns positive modifier for creature with expertise (Aboleth: DEX 9, CR 10, proficiency 2)", () => {
+		const result = calculateInitiative({
+			dexScore: 9,
+			cr: "10",
+			initiativeProficiency: 2,
+		});
+		// DEX mod = floor((9-10)/2) = -1, PB for CR 10 = 4, -1 + 2*4 = +7
+		expect(result.modifier).toBe(7);
+		expect(result.passive).toBe(17);
+	});
+
+	it("returns negative modifier for low DEX with no proficiency", () => {
+		const result = calculateInitiative({
+			dexScore: 8,
+			cr: "1",
+			initiativeProficiency: 0,
+		});
+		// DEX mod = floor((8-10)/2) = -1, 0 * PB = 0, -1 + 0 = -1
+		expect(result.modifier).toBe(-1);
+		expect(result.passive).toBe(9);
+	});
+
+	it("returns zero modifier for DEX 10 with no proficiency", () => {
+		const result = calculateInitiative({
+			dexScore: 10,
+			cr: "1",
+			initiativeProficiency: 0,
+		});
+		expect(result.modifier).toBe(0);
+		expect(result.passive).toBe(10);
+	});
+
+	it("adds single proficiency bonus (multiplier 1)", () => {
+		const result = calculateInitiative({
+			dexScore: 14,
+			cr: "5",
+			initiativeProficiency: 1,
+		});
+		// DEX mod = +2, PB for CR 5 = 3, 2 + 1*3 = 5
+		expect(result.modifier).toBe(5);
+		expect(result.passive).toBe(15);
+	});
+
+	it("adds double proficiency bonus (multiplier 2 / expertise)", () => {
+		const result = calculateInitiative({
+			dexScore: 14,
+			cr: "5",
+			initiativeProficiency: 2,
+		});
+		// DEX mod = +2, PB for CR 5 = 3, 2 + 2*3 = 8
+		expect(result.modifier).toBe(8);
+		expect(result.passive).toBe(18);
+	});
+
+	it("handles no proficiency (multiplier 0) — reduces to raw DEX modifier", () => {
+		const result = calculateInitiative({
+			dexScore: 14,
+			cr: "5",
+			initiativeProficiency: 0,
+		});
+		// DEX mod = +2, 0 * PB = 0, 2 + 0 = 2
+		expect(result.modifier).toBe(2);
+		expect(result.passive).toBe(12);
+	});
+
+	it("handles negative result even with proficiency (very low DEX)", () => {
+		const result = calculateInitiative({
+			dexScore: 3,
+			cr: "0",
+			initiativeProficiency: 1,
+		});
+		// DEX mod = floor((3-10)/2) = -4, PB for CR 0 = 2, -4 + 1*2 = -2
+		expect(result.modifier).toBe(-2);
+		expect(result.passive).toBe(8);
+	});
+
+	it("handles fractional CR values", () => {
+		const result = calculateInitiative({
+			dexScore: 12,
+			cr: "1/4",
+			initiativeProficiency: 1,
+		});
+		// DEX mod = +1, PB for CR 1/4 = 2, 1 + 1*2 = 3
+		expect(result.modifier).toBe(3);
+		expect(result.passive).toBe(13);
+	});
+});
+
+describe("formatInitiativeModifier", () => {
+	it("formats positive modifier with plus sign", () => {
+		expect(formatInitiativeModifier(7)).toBe("+7");
+	});
+
+	it("formats negative modifier with U+2212 minus sign", () => {
+		expect(formatInitiativeModifier(-1)).toBe("\u22121");
+	});
+
+	it("formats zero modifier with plus sign", () => {
+		expect(formatInitiativeModifier(0)).toBe("+0");
+	});
+});

packages/domain/src/__tests__/remove-combatant.test.ts

@@ -0,0 +1,142 @@
+import { describe, expect, it } from "vitest";
+import { removeCombatant } from "../remove-combatant.js";
+import type { Combatant, Encounter } from "../types.js";
+import { combatantId, isDomainError } from "../types.js";
+
+// --- Helpers ---
+
+function makeCombatant(name: string): Combatant {
+	return { id: combatantId(name), name };
+}
+
+const A = makeCombatant("A");
+const B = makeCombatant("B");
+const C = makeCombatant("C");
+const D = makeCombatant("D");
+
+function enc(
+	combatants: Combatant[],
+	activeIndex = 0,
+	roundNumber = 1,
+): Encounter {
+	return { combatants, activeIndex, roundNumber };
+}
+
+function successResult(encounter: Encounter, id: string) {
+	const result = removeCombatant(encounter, combatantId(id));
+	if (isDomainError(result)) {
+		throw new Error(`Expected success, got error: ${result.message}`);
+	}
+	return result;
+}
+
+// --- Acceptance Scenarios ---
+
+describe("removeCombatant", () => {
+	describe("acceptance scenarios", () => {
+		it("AS-1: remove combatant after active — activeIndex unchanged", () => {
+			// [A*, B, C] remove C → [A*, B], activeIndex stays 0
+			const e = enc([A, B, C], 0, 2);
+			const { encounter, events } = successResult(e, "C");
+
+			expect(encounter.combatants).toEqual([A, B]);
+			expect(encounter.activeIndex).toBe(0);
+			expect(encounter.roundNumber).toBe(2);
+			expect(events).toEqual([
+				{
+					type: "CombatantRemoved",
+					combatantId: combatantId("C"),
+					name: "C",
+				},
+			]);
+		});
+
+		it("AS-2: remove combatant before active — activeIndex decrements", () => {
+			// [A, B, C*] remove A → [B, C*], activeIndex 2→1
+			const e = enc([A, B, C], 2, 3);
+			const { encounter } = successResult(e, "A");
+
+			expect(encounter.combatants).toEqual([B, C]);
+			expect(encounter.activeIndex).toBe(1);
+			expect(encounter.roundNumber).toBe(3);
+		});
+
+		it("AS-3: remove active combatant mid-list — next slides in", () => {
+			// [A, B*, C, D] remove B → [A, C*, D], activeIndex stays 1
+			const e = enc([A, B, C, D], 1, 1);
+			const { encounter } = successResult(e, "B");
+
+			expect(encounter.combatants).toEqual([A, C, D]);
+			expect(encounter.activeIndex).toBe(1);
+		});
+
+		it("AS-4: remove active combatant at end — wraps to 0", () => {
+			// [A, B, C*] remove C → [A, B], activeIndex wraps to 0
+			const e = enc([A, B, C], 2, 1);
+			const { encounter } = successResult(e, "C");
+
+			expect(encounter.combatants).toEqual([A, B]);
+			expect(encounter.activeIndex).toBe(0);
+		});
+
+		it("AS-5: remove only combatant — empty list, activeIndex 0", () => {
+			const e = enc([A], 0, 5);
+			const { encounter } = successResult(e, "A");
+
+			expect(encounter.combatants).toEqual([]);
+			expect(encounter.activeIndex).toBe(0);
+			expect(encounter.roundNumber).toBe(5);
+		});
+
+		it("AS-6: ID not found — returns DomainError", () => {
+			const e = enc([A, B], 0, 1);
+			const result = removeCombatant(e, combatantId("nonexistent"));
+
+			expect(isDomainError(result)).toBe(true);
+			if (isDomainError(result)) {
+				expect(result.code).toBe("combatant-not-found");
+			}
+		});
+	});
+
+	describe("invariants", () => {
+		it("event shape includes combatantId and name", () => {
+			const e = enc([A, B], 0, 1);
+			const { events } = successResult(e, "B");
+
+			expect(events).toHaveLength(1);
+			expect(events[0]).toEqual({
+				type: "CombatantRemoved",
+				combatantId: combatantId("B"),
+				name: "B",
+			});
+		});
+
+		it("roundNumber never changes on removal", () => {
+			const e = enc([A, B, C], 1, 7);
+			const { encounter } = successResult(e, "A");
+			expect(encounter.roundNumber).toBe(7);
+		});
+
+		it("determinism — same input produces same output", () => {
+			const e = enc([A, B, C], 1, 3);
+			const result1 = removeCombatant(e, combatantId("B"));
+			const result2 = removeCombatant(e, combatantId("B"));
+			expect(result1).toEqual(result2);
+		});
+
+		it("every success emits exactly one CombatantRemoved event", () => {
+			const scenarios: [Encounter, string][] = [
+				[enc([A]), "A"],
+				[enc([A, B], 1), "A"],
+				[enc([A, B, C], 2, 5), "C"],
+			];
+
+			for (const [e, id] of scenarios) {
+				const { events } = successResult(e, id);
+				expect(events).toHaveLength(1);
+				expect(events[0].type).toBe("CombatantRemoved");
+			}
+		});
+	});
+});

packages/domain/src/__tests__/retreat-turn.test.ts

@@ -0,0 +1,184 @@
+import { describe, expect, it } from "vitest";
+import type { DomainEvent } from "../events.js";
+import { retreatTurn } from "../retreat-turn.js";
+import {
+	type Combatant,
+	combatantId,
+	createEncounter,
+	type Encounter,
+	isDomainError,
+} from "../types.js";
+
+// --- Helpers ---
+
+function makeCombatant(name: string): Combatant {
+	return { id: combatantId(name), name };
+}
+
+const A = makeCombatant("A");
+const B = makeCombatant("B");
+const C = makeCombatant("C");
+
+function encounter(
+	combatants: Combatant[],
+	activeIndex: number,
+	roundNumber: number,
+): Encounter {
+	const result = createEncounter(combatants, activeIndex, roundNumber);
+	if (isDomainError(result)) {
+		throw new Error(`Test setup failed: ${result.message}`);
+	}
+	return result;
+}
+
+function successResult(enc: Encounter) {
+	const result = retreatTurn(enc);
+	if (isDomainError(result)) {
+		throw new Error(`Expected success, got error: ${result.message}`);
+	}
+	return result;
+}
+
+// --- Acceptance Scenarios ---
+
+describe("retreatTurn", () => {
+	describe("acceptance scenarios", () => {
+		it("scenario 1: mid-round retreat — retreats from second to first combatant", () => {
+			const enc = encounter([A, B, C], 1, 1);
+			const { encounter: next, events } = successResult(enc);
+
+			expect(next.activeIndex).toBe(0);
+			expect(next.roundNumber).toBe(1);
+			expect(events).toEqual([
+				{
+					type: "TurnRetreated",
+					previousCombatantId: combatantId("B"),
+					newCombatantId: combatantId("A"),
+					roundNumber: 1,
+				},
+			]);
+		});
+
+		it("scenario 2: round-boundary retreat — wraps from first combatant to last, decrements round", () => {
+			const enc = encounter([A, B, C], 0, 2);
+			const { encounter: next, events } = successResult(enc);
+
+			expect(next.activeIndex).toBe(2);
+			expect(next.roundNumber).toBe(1);
+			expect(events).toEqual([
+				{
+					type: "TurnRetreated",
+					previousCombatantId: combatantId("A"),
+					newCombatantId: combatantId("C"),
+					roundNumber: 1,
+				},
+				{
+					type: "RoundRetreated",
+					newRoundNumber: 1,
+				},
+			]);
+		});
+
+		it("scenario 3: start-of-encounter error — cannot retreat at round 1 index 0", () => {
+			const enc = encounter([A, B, C], 0, 1);
+			const result = retreatTurn(enc);
+
+			expect(isDomainError(result)).toBe(true);
+			if (isDomainError(result)) {
+				expect(result.code).toBe("no-previous-turn");
+			}
+		});
+
+		it("scenario 4: single-combatant retreat — wraps to same combatant, decrements round", () => {
+			const enc = encounter([A], 0, 2);
+			const { encounter: next, events } = successResult(enc);
+
+			expect(next.activeIndex).toBe(0);
+			expect(next.roundNumber).toBe(1);
+			expect(events).toEqual([
+				{
+					type: "TurnRetreated",
+					previousCombatantId: combatantId("A"),
+					newCombatantId: combatantId("A"),
+					roundNumber: 1,
+				},
+				{
+					type: "RoundRetreated",
+					newRoundNumber: 1,
+				},
+			]);
+		});
+
+		it("scenario 5: empty-encounter error", () => {
+			const enc: Encounter = {
+				combatants: [],
+				activeIndex: 0,
+				roundNumber: 1,
+			};
+			const result = retreatTurn(enc);
+
+			expect(isDomainError(result)).toBe(true);
+			if (isDomainError(result)) {
+				expect(result.code).toBe("invalid-encounter");
+			}
+		});
+	});
+
+	describe("invariants", () => {
+		it("determinism — same input produces same output", () => {
+			const enc = encounter([A, B, C], 1, 3);
+			const result1 = retreatTurn(enc);
+			const result2 = retreatTurn(enc);
+			expect(result1).toEqual(result2);
+		});
+
+		it("activeIndex always in bounds after retreat", () => {
+			const combatants = [A, B, C];
+			// Start at round 4 so we can retreat many times
+			let enc = encounter(combatants, 2, 4);
+
+			for (let i = 0; i < 9; i++) {
+				const result = successResult(enc);
+				expect(result.encounter.activeIndex).toBeGreaterThanOrEqual(0);
+				expect(result.encounter.activeIndex).toBeLessThan(combatants.length);
+				enc = result.encounter;
+			}
+		});
+
+		it("roundNumber never goes below 1", () => {
+			let enc = encounter([A, B, C], 2, 2);
+
+			// Retreat through rounds — should stop at round 1 index 0
+			while (!(enc.roundNumber === 1 && enc.activeIndex === 0)) {
+				const result = successResult(enc);
+				expect(result.encounter.roundNumber).toBeGreaterThanOrEqual(1);
+				enc = result.encounter;
+			}
+		});
+
+		it("every success emits at least TurnRetreated", () => {
+			const scenarios: Encounter[] = [
+				encounter([A, B, C], 1, 1),
+				encounter([A, B, C], 0, 2),
+				encounter([A], 0, 2),
+			];
+
+			for (const enc of scenarios) {
+				const result = successResult(enc);
+				const hasTurnRetreated = result.events.some(
+					(e: DomainEvent) => e.type === "TurnRetreated",
+				);
+				expect(hasTurnRetreated).toBe(true);
+			}
+		});
+
+		it("event ordering: on wrap, events are [TurnRetreated, RoundRetreated]", () => {
+			const enc = encounter([A, B, C], 0, 2);
+			const { events } = successResult(enc);
+
+			expect(events).toHaveLength(2);
+			expect(events[0].type).toBe("TurnRetreated");
+			expect(events[1].type).toBe("RoundRetreated");
+		});
+	});
+});

packages/domain/src/__tests__/roll-initiative.test.ts

@@ -0,0 +1,70 @@
+import { describe, expect, it } from "vitest";
+import { rollInitiative } from "../roll-initiative.js";
+import { isDomainError } from "../types.js";
+
+describe("rollInitiative", () => {
+	describe("valid rolls", () => {
+		it("normal roll: 15 + modifier 7 = 22", () => {
+			expect(rollInitiative(15, 7)).toBe(22);
+		});
+
+		it("boundary: roll 1 + modifier 0 = 1", () => {
+			expect(rollInitiative(1, 0)).toBe(1);
+		});
+
+		it("boundary: roll 20 + modifier 0 = 20", () => {
+			expect(rollInitiative(20, 0)).toBe(20);
+		});
+
+		it("negative modifier: roll 1 + (−3) = −2", () => {
+			expect(rollInitiative(1, -3)).toBe(-2);
+		});
+
+		it("zero modifier: roll 10 + 0 = 10", () => {
+			expect(rollInitiative(10, 0)).toBe(10);
+		});
+
+		it("large positive modifier: roll 20 + 12 = 32", () => {
+			expect(rollInitiative(20, 12)).toBe(32);
+		});
+	});
+
+	describe("invalid dice rolls", () => {
+		it("rejects 0", () => {
+			const result = rollInitiative(0, 5);
+			expect(isDomainError(result)).toBe(true);
+			if (isDomainError(result)) {
+				expect(result.code).toBe("invalid-dice-roll");
+			}
+		});
+
+		it("rejects 21", () => {
+			const result = rollInitiative(21, 5);
+			expect(isDomainError(result)).toBe(true);
+			if (isDomainError(result)) {
+				expect(result.code).toBe("invalid-dice-roll");
+			}
+		});
+
+		it("rejects non-integer (3.5)", () => {
+			const result = rollInitiative(3.5, 0);
+			expect(isDomainError(result)).toBe(true);
+		});
+
+		it("rejects negative dice roll", () => {
+			const result = rollInitiative(-1, 0);
+			expect(isDomainError(result)).toBe(true);
+		});
+
+		it("rejects NaN", () => {
+			const result = rollInitiative(Number.NaN, 0);
+			expect(isDomainError(result)).toBe(true);
+		});
+	});
+
+	describe("determinism", () => {
+		it("same input produces same output", () => {
+			expect(rollInitiative(10, 5)).toBe(rollInitiative(10, 5));
+		});
+	});
+});

packages/domain/src/__tests__/set-ac.test.ts

@@ -0,0 +1,143 @@
+import { describe, expect, it } from "vitest";
+import { setAc } from "../set-ac.js";
+import type { Combatant, Encounter } from "../types.js";
+import { combatantId, isDomainError } from "../types.js";
+
+function makeCombatant(name: string, ac?: number): Combatant {
+	return ac === undefined
+		? { id: combatantId(name), name }
+		: { id: combatantId(name), name, ac };
+}
+
+function enc(
+	combatants: Combatant[],
+	activeIndex = 0,
+	roundNumber = 1,
+): Encounter {
+	return { combatants, activeIndex, roundNumber };
+}
+
+function successResult(
+	encounter: Encounter,
+	id: string,
+	value: number | undefined,
+) {
+	const result = setAc(encounter, combatantId(id), value);
+	if (isDomainError(result)) {
+		throw new Error(`Expected success, got error: ${result.message}`);
+	}
+	return result;
+}
+
+describe("setAc", () => {
+	it("sets AC to a valid value", () => {
+		const e = enc([makeCombatant("A"), makeCombatant("B")]);
+		const { encounter, events } = successResult(e, "A", 15);
+
+		expect(encounter.combatants[0].ac).toBe(15);
+		expect(events).toEqual([
+			{
+				type: "AcSet",
+				combatantId: combatantId("A"),
+				previousAc: undefined,
+				newAc: 15,
+			},
+		]);
+	});
+
+	it("sets AC to 0", () => {
+		const e = enc([makeCombatant("A")]);
+		const { encounter } = successResult(e, "A", 0);
+
+		expect(encounter.combatants[0].ac).toBe(0);
+	});
+
+	it("clears AC with undefined", () => {
+		const e = enc([makeCombatant("A", 15)]);
+		const { encounter, events } = successResult(e, "A", undefined);
+
+		expect(encounter.combatants[0].ac).toBeUndefined();
+		expect(events[0]).toMatchObject({
+			previousAc: 15,
+			newAc: undefined,
+		});
+	});
+
+	it("returns error for nonexistent combatant", () => {
+		const e = enc([makeCombatant("A")]);
+		const result = setAc(e, combatantId("nonexistent"), 10);
+
+		expect(isDomainError(result)).toBe(true);
+		if (isDomainError(result)) {
+			expect(result.code).toBe("combatant-not-found");
+		}
+	});
+
+	it("returns error for negative AC", () => {
+		const e = enc([makeCombatant("A")]);
+		const result = setAc(e, combatantId("A"), -1);
+
+		expect(isDomainError(result)).toBe(true);
+		if (isDomainError(result)) {
+			expect(result.code).toBe("invalid-ac");
+		}
+	});
+
+	it("returns error for non-integer AC", () => {
+		const e = enc([makeCombatant("A")]);
+		const result = setAc(e, combatantId("A"), 3.5);
+
+		expect(isDomainError(result)).toBe(true);
+		if (isDomainError(result)) {
+			expect(result.code).toBe("invalid-ac");
+		}
+	});
+
+	it("returns error for NaN", () => {
+		const e = enc([makeCombatant("A")]);
+		const result = setAc(e, combatantId("A"), Number.NaN);
+		expect(isDomainError(result)).toBe(true);
+	});
+
+	it("preserves other fields when setting AC", () => {
+		const combatant: Combatant = {
+			id: combatantId("A"),
+			name: "Aria",
+			initiative: 15,
+			maxHp: 20,
+			currentHp: 18,
+		};
+		const e = enc([combatant]);
+		const { encounter } = successResult(e, "A", 16);
+
+		const updated = encounter.combatants[0];
+		expect(updated.ac).toBe(16);
+		expect(updated.name).toBe("Aria");
+		expect(updated.initiative).toBe(15);
+		expect(updated.maxHp).toBe(20);
+		expect(updated.currentHp).toBe(18);
+	});
+
+	it("does not reorder combatants", () => {
+		const e = enc([makeCombatant("A"), makeCombatant("B")]);
+		const { encounter } = successResult(e, "B", 18);
+
+		expect(encounter.combatants[0].id).toBe(combatantId("A"));
+		expect(encounter.combatants[1].id).toBe(combatantId("B"));
+	});
+
+	it("preserves activeIndex and roundNumber", () => {
+		const e = enc([makeCombatant("A"), makeCombatant("B")], 1, 5);
+		const { encounter } = successResult(e, "A", 14);
+
+		expect(encounter.activeIndex).toBe(1);
+		expect(encounter.roundNumber).toBe(5);
+	});
+
+	it("does not mutate input encounter", () => {
+		const e = enc([makeCombatant("A")]);
+		const original = JSON.parse(JSON.stringify(e));
+		setAc(e, combatantId("A"), 10);
+		expect(e).toEqual(original);
+	});
+});

packages/domain/src/__tests__/set-hp.test.ts

@@ -0,0 +1,197 @@
+import { describe, expect, it } from "vitest";
+import { setHp } from "../set-hp.js";
+import type { Combatant, Encounter } from "../types.js";
+import { combatantId, isDomainError } from "../types.js";
+
+function makeCombatant(
+	name: string,
+	opts?: { maxHp?: number; currentHp?: number },
+): Combatant {
+	return {
+		id: combatantId(name),
+		name,
+		...(opts?.maxHp !== undefined
+			? { maxHp: opts.maxHp, currentHp: opts.currentHp ?? opts.maxHp }
+			: {}),
+	};
+}
+
+function enc(combatants: Combatant[]): Encounter {
+	return { combatants, activeIndex: 0, roundNumber: 1 };
+}
+
+function successResult(
+	encounter: Encounter,
+	id: string,
+	maxHp: number | undefined,
+) {
+	const result = setHp(encounter, combatantId(id), maxHp);
+	if (isDomainError(result)) {
+		throw new Error(`Expected success, got error: ${result.message}`);
+	}
+	return result;
+}
+
+describe("setHp", () => {
+	describe("acceptance scenarios", () => {
+		it("sets maxHp on a combatant with no HP — currentHp defaults to maxHp", () => {
+			const e = enc([makeCombatant("A")]);
+			const { encounter } = successResult(e, "A", 20);
+			expect(encounter.combatants[0].maxHp).toBe(20);
+			expect(encounter.combatants[0].currentHp).toBe(20);
+		});
+
+		it("increases maxHp while at full health — currentHp stays synced", () => {
+			const e = enc([makeCombatant("A", { maxHp: 20, currentHp: 20 })]);
+			const { encounter } = successResult(e, "A", 30);
+			expect(encounter.combatants[0].maxHp).toBe(30);
+			expect(encounter.combatants[0].currentHp).toBe(30);
+		});
+
+		it("increases maxHp while not at full health — currentHp unchanged", () => {
+			const e = enc([makeCombatant("A", { maxHp: 20, currentHp: 12 })]);
+			const { encounter } = successResult(e, "A", 30);
+			expect(encounter.combatants[0].maxHp).toBe(30);
+			expect(encounter.combatants[0].currentHp).toBe(12);
+		});
+
+		it("reduces maxHp below currentHp — clamps currentHp", () => {
+			const e = enc([makeCombatant("A", { maxHp: 20, currentHp: 18 })]);
+			const { encounter } = successResult(e, "A", 10);
+			expect(encounter.combatants[0].maxHp).toBe(10);
+			expect(encounter.combatants[0].currentHp).toBe(10);
+		});
+
+		it("clears maxHp — both maxHp and currentHp become undefined", () => {
+			const e = enc([makeCombatant("A", { maxHp: 20, currentHp: 15 })]);
+			const { encounter } = successResult(e, "A", undefined);
+			expect(encounter.combatants[0].maxHp).toBeUndefined();
+			expect(encounter.combatants[0].currentHp).toBeUndefined();
+		});
+	});
+
+	describe("invariants", () => {
+		it("is pure — same input produces same output", () => {
+			const e = enc([makeCombatant("A")]);
+			const r1 = setHp(e, combatantId("A"), 10);
+			const r2 = setHp(e, combatantId("A"), 10);
+			expect(r1).toEqual(r2);
+		});
+
+		it("does not mutate input encounter", () => {
+			const e = enc([makeCombatant("A")]);
+			const original = JSON.parse(JSON.stringify(e));
+			setHp(e, combatantId("A"), 10);
+			expect(e).toEqual(original);
+		});
+
+		it("emits MaxHpSet event with correct shape", () => {
+			const e = enc([makeCombatant("A", { maxHp: 20, currentHp: 18 })]);
+			const { events } = successResult(e, "A", 10);
+			expect(events).toEqual([
+				{
+					type: "MaxHpSet",
+					combatantId: combatantId("A"),
+					previousMaxHp: 20,
+					newMaxHp: 10,
+					previousCurrentHp: 18,
+					newCurrentHp: 10,
+				},
+			]);
+		});
+
+		it("preserves activeIndex and roundNumber", () => {
+			const e = {
+				combatants: [makeCombatant("A"), makeCombatant("B")],
+				activeIndex: 1,
+				roundNumber: 3,
+			};
+			const { encounter } = successResult(e, "A", 10);
+			expect(encounter.activeIndex).toBe(1);
+			expect(encounter.roundNumber).toBe(3);
+		});
+	});
+
+	describe("error cases", () => {
+		it("returns error for nonexistent combatant", () => {
+			const e = enc([makeCombatant("A")]);
+			const result = setHp(e, combatantId("Z"), 10);
+			expect(isDomainError(result)).toBe(true);
+			if (isDomainError(result)) {
+				expect(result.code).toBe("combatant-not-found");
+			}
+		});
+
+		it("rejects maxHp of 0", () => {
+			const e = enc([makeCombatant("A")]);
+			const result = setHp(e, combatantId("A"), 0);
+			expect(isDomainError(result)).toBe(true);
+			if (isDomainError(result)) {
+				expect(result.code).toBe("invalid-max-hp");
+			}
+		});
+
+		it("rejects negative maxHp", () => {
+			const e = enc([makeCombatant("A")]);
+			const result = setHp(e, combatantId("A"), -5);
+			expect(isDomainError(result)).toBe(true);
+			if (isDomainError(result)) {
+				expect(result.code).toBe("invalid-max-hp");
+			}
+		});
+
+		it("rejects non-integer maxHp", () => {
+			const e = enc([makeCombatant("A")]);
+			const result = setHp(e, combatantId("A"), 3.5);
+			expect(isDomainError(result)).toBe(true);
+			if (isDomainError(result)) {
+				expect(result.code).toBe("invalid-max-hp");
+			}
+		});
+	});
+
+	describe("edge cases", () => {
+		it("maxHp=1 is valid", () => {
+			const e = enc([makeCombatant("A")]);
+			const { encounter } = successResult(e, "A", 1);
+			expect(encounter.combatants[0].maxHp).toBe(1);
+			expect(encounter.combatants[0].currentHp).toBe(1);
+		});
+
+		it("setting same maxHp does not change currentHp", () => {
+			const e = enc([makeCombatant("A", { maxHp: 10, currentHp: 7 })]);
+			const { encounter } = successResult(e, "A", 10);
+			expect(encounter.combatants[0].currentHp).toBe(7);
+		});
+
+		it("clear then re-set loses currentHp — UI must commit on blur", () => {
+			// Simulates: user clears max HP field then retypes a new value
+			// If the domain sees clear→set as two calls, currentHp resets.
+			// This is why the UI commits max HP only on blur, not per-keystroke.
+			const e = enc([makeCombatant("A", { maxHp: 22, currentHp: 12 })]);
+			const cleared = successResult(e, "A", undefined);
+			expect(cleared.encounter.combatants[0].currentHp).toBeUndefined();
+			const retyped = successResult(cleared.encounter, "A", 122);
+			// currentHp resets to 122 (first-set path) — original 12 is lost
+			expect(retyped.encounter.combatants[0].currentHp).toBe(122);
+		});
+
+		it("single committed change preserves currentHp", () => {
+			// The blur-commit approach: domain only sees 22→122, not 22→undefined→122
+			const e = enc([makeCombatant("A", { maxHp: 22, currentHp: 12 })]);
+			const { encounter } = successResult(e, "A", 122);
+			expect(encounter.combatants[0].maxHp).toBe(122);
+			expect(encounter.combatants[0].currentHp).toBe(12);
+		});
+
+		it("does not affect other combatants", () => {
+			const e = enc([
+				makeCombatant("A"),
+				makeCombatant("B", { maxHp: 30, currentHp: 25 }),
+			]);
+			const { encounter } = successResult(e, "A", 10);
+			expect(encounter.combatants[1].maxHp).toBe(30);
+			expect(encounter.combatants[1].currentHp).toBe(25);
+		});
+	});
+});

packages/domain/src/__tests__/set-initiative.test.ts

@@ -0,0 +1,314 @@
+import { describe, expect, it } from "vitest";
+import { setInitiative } from "../set-initiative.js";
+import type { Combatant, Encounter } from "../types.js";
+import { combatantId, isDomainError } from "../types.js";
+
+// --- Helpers ---
+
+function makeCombatant(name: string, initiative?: number): Combatant {
+	return initiative === undefined
+		? { id: combatantId(name), name }
+		: { id: combatantId(name), name, initiative };
+}
+
+const A = makeCombatant("A");
+const B = makeCombatant("B");
+const C = makeCombatant("C");
+function enc(
+	combatants: Combatant[],
+	activeIndex = 0,
+	roundNumber = 1,
+): Encounter {
+	return { combatants, activeIndex, roundNumber };
+}
+
+function successResult(
+	encounter: Encounter,
+	id: string,
+	value: number | undefined,
+) {
+	const result = setInitiative(encounter, combatantId(id), value);
+	if (isDomainError(result)) {
+		throw new Error(`Expected success, got error: ${result.message}`);
+	}
+	return result;
+}
+
+function names(encounter: Encounter): string[] {
+	return encounter.combatants.map((c) => c.name);
+}
+
+// --- US1: Set Initiative ---
+
+describe("setInitiative", () => {
+	describe("US1: set initiative value", () => {
+		it("AS-1: set initiative on combatant with no initiative", () => {
+			const e = enc([A, B], 0);
+			const { encounter, events } = successResult(e, "A", 15);
+
+			expect(encounter.combatants[0].initiative).toBe(15);
+			expect(events).toEqual([
+				{
+					type: "InitiativeSet",
+					combatantId: combatantId("A"),
+					previousValue: undefined,
+					newValue: 15,
+				},
+			]);
+		});
+
+		it("AS-2: change existing initiative value", () => {
+			const e = enc([makeCombatant("A", 15), B], 0);
+			const { encounter, events } = successResult(e, "A", 8);
+
+			const a = encounter.combatants.find((c) => c.id === combatantId("A"));
+			expect(a?.initiative).toBe(8);
+			expect(events[0]).toMatchObject({
+				previousValue: 15,
+				newValue: 8,
+			});
+		});
+
+		it("AS-3: reject non-integer initiative value", () => {
+			const e = enc([A, B], 0);
+			const result = setInitiative(e, combatantId("A"), 3.5);
+
+			expect(isDomainError(result)).toBe(true);
+			if (isDomainError(result)) {
+				expect(result.code).toBe("invalid-initiative");
+			}
+		});
+
+		it("AS-3b: reject NaN", () => {
+			const e = enc([A, B], 0);
+			const result = setInitiative(e, combatantId("A"), Number.NaN);
+			expect(isDomainError(result)).toBe(true);
+		});
+
+		it("AS-3c: reject Infinity", () => {
+			const e = enc([A, B], 0);
+			const result = setInitiative(
+				e,
+				combatantId("A"),
+				Number.POSITIVE_INFINITY,
+			);
+			expect(isDomainError(result)).toBe(true);
+		});
+
+		it("AS-4: clear initiative moves combatant to end", () => {
+			const e = enc([makeCombatant("A", 15), makeCombatant("B", 10)], 0);
+			const { encounter } = successResult(e, "A", undefined);
+
+			const a = encounter.combatants.find((c) => c.id === combatantId("A"));
+			expect(a?.initiative).toBeUndefined();
+			// A should be after B now
+			expect(names(encounter)).toEqual(["B", "A"]);
+		});
+
+		it("returns error for nonexistent combatant", () => {
+			const e = enc([A, B], 0);
+			const result = setInitiative(e, combatantId("nonexistent"), 10);
+
+			expect(isDomainError(result)).toBe(true);
+			if (isDomainError(result)) {
+				expect(result.code).toBe("combatant-not-found");
+			}
+		});
+	});
+
+	// --- US2: Automatic Ordering ---
+
+	describe("US2: automatic ordering by initiative", () => {
+		it("AS-1: orders combatants descending by initiative", () => {
+			// Start with A(20), B(5), C(15) → should be A(20), C(15), B(5)
+			const e = enc([
+				makeCombatant("A", 20),
+				makeCombatant("B", 5),
+				makeCombatant("C", 15),
+			]);
+			// Set C's initiative to trigger reorder (no-op change to force sort)
+			const { encounter } = successResult(e, "C", 15);
+			expect(names(encounter)).toEqual(["A", "C", "B"]);
+		});
+
+		it("AS-2: changing initiative reorders correctly", () => {
+			const e = enc([
+				makeCombatant("A", 20),
+				makeCombatant("C", 15),
+				makeCombatant("B", 5),
+			]);
+			const { encounter } = successResult(e, "B", 25);
+			expect(names(encounter)).toEqual(["B", "A", "C"]);
+		});
+
+		it("AS-3: stable sort for equal initiative values", () => {
+			const e = enc([makeCombatant("A", 10), makeCombatant("B", 10)]);
+			// Set A's initiative to same value to confirm stable sort
+			const { encounter } = successResult(e, "A", 10);
+			expect(names(encounter)).toEqual(["A", "B"]);
+		});
+	});
+
+	// --- US3: Combatants Without Initiative ---
+
+	describe("US3: combatants without initiative", () => {
+		it("AS-1: unset combatants appear after those with initiative", () => {
+			const e = enc([
+				makeCombatant("A", 15),
+				B, // no initiative
+				makeCombatant("C", 10),
+			]);
+			const { encounter } = successResult(e, "A", 15);
+			expect(names(encounter)).toEqual(["A", "C", "B"]);
+		});
+
+		it("AS-2: multiple unset combatants preserve relative order", () => {
+			const e = enc([A, B]); // both no initiative
+			const { encounter } = successResult(e, "A", undefined);
+			expect(names(encounter)).toEqual(["A", "B"]);
+		});
+
+		it("AS-3: setting initiative moves combatant to correct position", () => {
+			const e = enc([
+				makeCombatant("A", 20),
+				B, // no initiative
+				makeCombatant("C", 10),
+			]);
+			const { encounter } = successResult(e, "B", 12);
+			expect(names(encounter)).toEqual(["A", "B", "C"]);
+		});
+	});
+
+	// --- US4: Active Turn Preservation ---
+
+	describe("US4: active turn preservation during reorder", () => {
+		it("AS-1: reorder preserves active turn on different combatant", () => {
+			// B is active (index 1), change A's initiative
+			const e = enc(
+				[makeCombatant("A", 10), makeCombatant("B", 15), makeCombatant("C", 5)],
+				1,
+			);
+			// Change A's initiative to 20, causing reorder
+			const { encounter } = successResult(e, "A", 20);
+			// New order: A(20), B(15), C(5)
+			expect(names(encounter)).toEqual(["A", "B", "C"]);
+			// B should still be active
+			expect(encounter.combatants[encounter.activeIndex].id).toBe(
+				combatantId("B"),
+			);
+		});
+
+		it("AS-2: active combatant's own initiative change preserves turn", () => {
+			const e = enc(
+				[makeCombatant("A", 20), makeCombatant("B", 15), makeCombatant("C", 5)],
+				0, // A is active
+			);
+			// Change A's initiative to 1, causing it to move to the end
+			const { encounter } = successResult(e, "A", 1);
+			// New order: B(15), C(5), A(1)
+			expect(names(encounter)).toEqual(["B", "C", "A"]);
+			// A should still be active
+			expect(encounter.combatants[encounter.activeIndex].id).toBe(
+				combatantId("A"),
+			);
+		});
+	});
+
+	// --- Invariants ---
+
+	describe("invariants", () => {
+		it("determinism — same input produces same output", () => {
+			const e = enc([A, B, C], 1, 3);
+			const result1 = setInitiative(e, combatantId("A"), 10);
+			const result2 = setInitiative(e, combatantId("A"), 10);
+			expect(result1).toEqual(result2);
+		});
+
+		it("immutability — input encounter is not mutated", () => {
+			const e = enc([A, B], 0, 2);
+			const original = JSON.parse(JSON.stringify(e));
+			setInitiative(e, combatantId("A"), 10);
+			expect(e).toEqual(original);
+		});
+
+		it("event shape includes all required fields", () => {
+			const e = enc([makeCombatant("A", 5), B], 0);
+			const { events } = successResult(e, "A", 10);
+
+			expect(events).toHaveLength(1);
+			expect(events[0]).toEqual({
+				type: "InitiativeSet",
+				combatantId: combatantId("A"),
+				previousValue: 5,
+				newValue: 10,
+			});
+		});
+
+		it("roundNumber is never changed", () => {
+			const e = enc([A, B], 0, 7);
+			const { encounter } = successResult(e, "A", 10);
+			expect(encounter.roundNumber).toBe(7);
+		});
+
+		it("every success emits exactly one InitiativeSet event", () => {
+			const scenarios: [Encounter, string, number | undefined][] = [
+				[enc([A]), "A", 10],
+				[enc([A, B], 1), "A", 5],
+				[enc([makeCombatant("A", 10)]), "A", undefined],
+			];
+
+			for (const [e, id, value] of scenarios) {
+				const { events } = successResult(e, id, value);
+				expect(events).toHaveLength(1);
+				expect(events[0].type).toBe("InitiativeSet");
+			}
+		});
+	});
+
+	// --- Edge Cases ---
+
+	describe("edge cases", () => {
+		it("zero is a valid initiative value", () => {
+			const e = enc([A, B], 0);
+			const { encounter } = successResult(e, "A", 0);
+			const a = encounter.combatants.find((c) => c.id === combatantId("A"));
+			expect(a?.initiative).toBe(0);
+		});
+
+		it("negative initiative is valid", () => {
+			const e = enc([A, B], 0);
+			const { encounter } = successResult(e, "A", -5);
+			const a = encounter.combatants.find((c) => c.id === combatantId("A"));
+			expect(a?.initiative).toBe(-5);
+		});
+
+		it("negative sorts below positive", () => {
+			const e = enc([makeCombatant("A", -3), makeCombatant("B", 10)]);
+			const { encounter } = successResult(e, "A", -3);
+			expect(names(encounter)).toEqual(["B", "A"]);
+		});
+
+		it("all combatants with same initiative preserve order", () => {
+			const e = enc([
+				makeCombatant("A", 10),
+				makeCombatant("B", 10),
+				makeCombatant("C", 10),
+			]);
+			const { encounter } = successResult(e, "B", 10);
+			expect(names(encounter)).toEqual(["A", "B", "C"]);
+		});
+
+		it("clearing initiative on last combatant with initiative", () => {
+			const e = enc([makeCombatant("A", 10), B], 0);
+			const { encounter } = successResult(e, "A", undefined);
+			// Both unset now, preserve relative order
+			expect(names(encounter)).toEqual(["A", "B"]);
+		});
+
+		it("undefined value skips integer validation", () => {
+			const e = enc([A], 0);
+			const result = setInitiative(e, combatantId("A"), undefined);
+			expect(isDomainError(result)).toBe(false);
+		});
+	});
+});

packages/domain/src/__tests__/toggle-concentration.test.ts

@@ -0,0 +1,69 @@
+import { describe, expect, it } from "vitest";
+import { toggleConcentration } from "../toggle-concentration.js";
+import type { Combatant, Encounter } from "../types.js";
+import { combatantId, isDomainError } from "../types.js";
+
+function makeCombatant(name: string, isConcentrating?: boolean): Combatant {
+	return isConcentrating
+		? { id: combatantId(name), name, isConcentrating }
+		: { id: combatantId(name), name };
+}
+
+function enc(combatants: Combatant[]): Encounter {
+	return { combatants, activeIndex: 0, roundNumber: 1 };
+}
+
+function success(encounter: Encounter, id: string) {
+	const result = toggleConcentration(encounter, combatantId(id));
+	if (isDomainError(result)) {
+		throw new Error(`Expected success, got error: ${result.message}`);
+	}
+	return result;
+}
+
+describe("toggleConcentration", () => {
+	it("toggles concentration on when falsy", () => {
+		const e = enc([makeCombatant("A")]);
+		const { encounter, events } = success(e, "A");
+
+		expect(encounter.combatants[0].isConcentrating).toBe(true);
+		expect(events).toEqual([
+			{ type: "ConcentrationStarted", combatantId: combatantId("A") },
+		]);
+	});
+
+	it("toggles concentration off when true", () => {
+		const e = enc([makeCombatant("A", true)]);
+		const { encounter, events } = success(e, "A");
+
+		expect(encounter.combatants[0].isConcentrating).toBeUndefined();
+		expect(events).toEqual([
+			{ type: "ConcentrationEnded", combatantId: combatantId("A") },
+		]);
+	});
+
+	it("returns error for nonexistent combatant", () => {
+		const e = enc([makeCombatant("A")]);
+		const result = toggleConcentration(e, combatantId("missing"));
+
+		expect(isDomainError(result)).toBe(true);
+		if (isDomainError(result)) {
+			expect(result.code).toBe("combatant-not-found");
+		}
+	});
+
+	it("does not mutate input encounter", () => {
+		const e = enc([makeCombatant("A")]);
+		const original = JSON.parse(JSON.stringify(e));
+		toggleConcentration(e, combatantId("A"));
+		expect(e).toEqual(original);
+	});
+
+	it("does not affect other combatants", () => {
+		const e = enc([makeCombatant("A"), makeCombatant("B", true)]);
+		const { encounter } = success(e, "A");
+
+		expect(encounter.combatants[0].isConcentrating).toBe(true);
+		expect(encounter.combatants[1].isConcentrating).toBe(true);
+	});
+});

packages/domain/src/__tests__/toggle-condition.test.ts

@@ -0,0 +1,120 @@
+import { describe, expect, it } from "vitest";
+import type { ConditionId } from "../conditions.js";
+import { CONDITION_DEFINITIONS } from "../conditions.js";
+import { toggleCondition } from "../toggle-condition.js";
+import type { Combatant, Encounter } from "../types.js";
+import { combatantId, isDomainError } from "../types.js";
+
+function makeCombatant(
+	name: string,
+	conditions?: readonly ConditionId[],
+): Combatant {
+	return conditions
+		? { id: combatantId(name), name, conditions }
+		: { id: combatantId(name), name };
+}
+
+function enc(combatants: Combatant[]): Encounter {
+	return { combatants, activeIndex: 0, roundNumber: 1 };
+}
+
+function success(encounter: Encounter, id: string, condition: ConditionId) {
+	const result = toggleCondition(encounter, combatantId(id), condition);
+	if (isDomainError(result)) {
+		throw new Error(`Expected success, got error: ${result.message}`);
+	}
+	return result;
+}
+
+describe("toggleCondition", () => {
+	it("adds a condition when not present", () => {
+		const e = enc([makeCombatant("A")]);
+		const { encounter, events } = success(e, "A", "blinded");
+
+		expect(encounter.combatants[0].conditions).toEqual(["blinded"]);
+		expect(events).toEqual([
+			{
+				type: "ConditionAdded",
+				combatantId: combatantId("A"),
+				condition: "blinded",
+			},
+		]);
+	});
+
+	it("removes a condition when already present", () => {
+		const e = enc([makeCombatant("A", ["blinded"])]);
+		const { encounter, events } = success(e, "A", "blinded");
+
+		expect(encounter.combatants[0].conditions).toBeUndefined();
+		expect(events).toEqual([
+			{
+				type: "ConditionRemoved",
+				combatantId: combatantId("A"),
+				condition: "blinded",
+			},
+		]);
+	});
+
+	it("maintains definition order when adding conditions", () => {
+		const e = enc([makeCombatant("A", ["poisoned"])]);
+		const { encounter } = success(e, "A", "blinded");
+
+		expect(encounter.combatants[0].conditions).toEqual(["blinded", "poisoned"]);
+	});
+
+	it("prevents duplicate conditions", () => {
+		const e = enc([makeCombatant("A", ["blinded"])]);
+		// Toggling blinded again removes it, not duplicates
+		const { encounter } = success(e, "A", "blinded");
+		expect(encounter.combatants[0].conditions).toBeUndefined();
+	});
+
+	it("rejects unknown condition", () => {
+		const e = enc([makeCombatant("A")]);
+		const result = toggleCondition(
+			e,
+			combatantId("A"),
+			"flying" as ConditionId,
+		);
+
+		expect(isDomainError(result)).toBe(true);
+		if (isDomainError(result)) {
+			expect(result.code).toBe("unknown-condition");
+		}
+	});
+
+	it("returns error for nonexistent combatant", () => {
+		const e = enc([makeCombatant("A")]);
+		const result = toggleCondition(e, combatantId("missing"), "blinded");
+
+		expect(isDomainError(result)).toBe(true);
+		if (isDomainError(result)) {
+			expect(result.code).toBe("combatant-not-found");
+		}
+	});
+
+	it("does not mutate input encounter", () => {
+		const e = enc([makeCombatant("A")]);
+		const original = JSON.parse(JSON.stringify(e));
+		toggleCondition(e, combatantId("A"), "blinded");
+		expect(e).toEqual(original);
+	});
+
+	it("normalizes empty array to undefined on removal", () => {
+		const e = enc([makeCombatant("A", ["charmed"])]);
+		const { encounter } = success(e, "A", "charmed");
+
+		expect(encounter.combatants[0].conditions).toBeUndefined();
+	});
+
+	it("preserves order across all conditions", () => {
+		const order = CONDITION_DEFINITIONS.map((d) => d.id);
+		// Add in reverse order
+		let e = enc([makeCombatant("A")]);
+		for (const cond of [...order].reverse()) {
+			const result = success(e, "A", cond);
+			e = result.encounter;
+		}
+		expect(e.combatants[0].conditions).toEqual(order);
+	});
+});

packages/domain/src/add-combatant.ts

@@ -0,0 +1,50 @@
+import type { DomainEvent } from "./events.js";
+import type { CombatantId, DomainError, Encounter } from "./types.js";
+
+export interface AddCombatantSuccess {
+	readonly encounter: Encounter;
+	readonly events: DomainEvent[];
+}
+
+/**
+ * Pure function that adds a combatant to the end of an encounter's list.
+ *
+ * FR-001: Accepts an Encounter, CombatantId, and name; returns next state + events.
+ * FR-002: Appends new combatant to end of combatants list.
+ * FR-004: Rejects empty/whitespace-only names with DomainError.
+ * FR-005: Does not alter activeIndex or roundNumber.
+ * FR-006: Events returned as values, not dispatched via side effects.
+ */
+export function addCombatant(
+	encounter: Encounter,
+	id: CombatantId,
+	name: string,
+): AddCombatantSuccess | DomainError {
+	const trimmed = name.trim();
+
+	if (trimmed === "") {
+		return {
+			kind: "domain-error",
+			code: "invalid-name",
+			message: "Combatant name must not be empty",
+		};
+	}
+
+	const position = encounter.combatants.length;
+
+	return {
+		encounter: {
+			combatants: [...encounter.combatants, { id, name: trimmed }],
+			activeIndex: encounter.activeIndex,
+			roundNumber: encounter.roundNumber,
+		},
+		events: [
+			{
+				type: "CombatantAdded",
+				combatantId: id,
+				name: trimmed,
+				position,
+			},
+		],
+	};
+}

packages/domain/src/adjust-hp.ts

@@ -0,0 +1,77 @@
+import type { DomainEvent } from "./events.js";
+import type { CombatantId, DomainError, Encounter } from "./types.js";
+
+export interface AdjustHpSuccess {
+	readonly encounter: Encounter;
+	readonly events: DomainEvent[];
+}
+
+/**
+ * Pure function that adjusts a combatant's current HP by a delta.
+ *
+ * The result is clamped to [0, maxHp]. Requires the combatant to have
+ * HP tracking enabled (maxHp must be set).
+ */
+export function adjustHp(
+	encounter: Encounter,
+	combatantId: CombatantId,
+	delta: number,
+): AdjustHpSuccess | DomainError {
+	const targetIdx = encounter.combatants.findIndex((c) => c.id === combatantId);
+
+	if (targetIdx === -1) {
+		return {
+			kind: "domain-error",
+			code: "combatant-not-found",
+			message: `No combatant found with ID "${combatantId}"`,
+		};
+	}
+
+	const target = encounter.combatants[targetIdx];
+
+	if (target.maxHp === undefined || target.currentHp === undefined) {
+		return {
+			kind: "domain-error",
+			code: "no-hp-tracking",
+			message: `Combatant "${combatantId}" does not have HP tracking enabled`,
+		};
+	}
+
+	if (delta === 0) {
+		return {
+			kind: "domain-error",
+			code: "zero-delta",
+			message: "Delta must not be zero",
+		};
+	}
+
+	if (!Number.isInteger(delta)) {
+		return {
+			kind: "domain-error",
+			code: "invalid-delta",
+			message: `Delta must be an integer, got ${delta}`,
+		};
+	}
+
+	const previousHp = target.currentHp;
+	const newHp = Math.max(0, Math.min(target.maxHp, previousHp + delta));
+
+	return {
+		encounter: {
+			combatants: encounter.combatants.map((c) =>
+				c.id === combatantId ? { ...c, currentHp: newHp } : c,
+			),
+			activeIndex: encounter.activeIndex,
+			roundNumber: encounter.roundNumber,
+		},
+		events: [
+			{
+				type: "CurrentHpAdjusted",
+				combatantId,
+				previousHp,
+				newHp,
+				delta,
+			},
+		],
+	};
+}