3.3 KiB
Implementation Plan: Inline HP Delta Input
Branch: 014-inline-hp-delta | Date: 2026-03-05 | Spec: spec.md
Input: Feature specification from /specs/014-inline-hp-delta/spec.md
Summary
Replace the existing QuickHpInput component (which uses a damage/heal mode toggle) with a simpler inline HP delta input. Users type a number and press Enter to apply damage by default, or click explicit damage/heal buttons. No domain changes needed -- the existing adjustHp pure function already accepts positive and negative deltas. This is a UI-only refactor of the quick HP input component.
Technical Context
Language/Version: TypeScript 5.8 (strict mode, verbatimModuleSyntax) Primary Dependencies: React 19, Vite 6, Tailwind CSS v4, shadcn/ui-style components, Lucide React (icons) Storage: N/A (no storage changes -- existing localStorage persistence unchanged) Testing: Vitest Target Platform: Web browser (local-first, single-user) Project Type: Web application (monorepo: domain + application + web adapter) Performance Goals: Instant feedback on HP adjustment (<100ms perceived) Constraints: Local-first, single-user MVP Scale/Scope: Single encounter screen, ~1-20 combatants
Constitution Check
GATE: Must pass before Phase 0 research. Re-check after Phase 1 design.
| Principle | Status | Notes |
|---|---|---|
| I. Deterministic Domain Core | PASS | No domain changes. Existing adjustHp is a pure function. |
| II. Layered Architecture | PASS | Change is entirely in the adapter layer (web UI). Domain and application layers unchanged. |
| III. Agent Boundary | N/A | No agent features involved. |
| IV. Clarification-First | PASS | Spec is clear; no ambiguities remain. |
| V. Escalation Gates | PASS | Feature is within spec scope -- replacing existing UI with simplified version. |
| VI. MVP Baseline Language | PASS | Assumptions use "MVP baseline does not include" language. |
| VII. No Gameplay Rules | PASS | No gameplay mechanics in this feature. |
Gate result: PASS -- all principles satisfied.
Project Structure
Documentation (this feature)
specs/014-inline-hp-delta/
├── plan.md # This file
├── research.md # Phase 0 output
├── data-model.md # Phase 1 output
├── quickstart.md # Phase 1 output
└── tasks.md # Phase 2 output (/speckit.tasks command)
Source Code (repository root)
packages/domain/src/
├── adjust-hp.ts # Existing — no changes needed
├── types.ts # Existing — no changes needed
└── __tests__/adjust-hp.test.ts # Existing — no changes needed
packages/application/src/
└── adjust-hp-use-case.ts # Existing — no changes needed
apps/web/src/
├── components/
│ ├── quick-hp-input.tsx # MODIFY — replace mode toggle with damage/heal buttons
│ └── combatant-row.tsx # Existing — integration point (no changes expected)
└── hooks/
└── use-encounter.ts # Existing — no changes needed
Structure Decision: Existing monorepo structure (domain → application → web adapter) is used. This feature only modifies the web adapter layer, specifically the quick-hp-input.tsx component. No new files or packages needed.