Implement the 031-quality-gates-hygiene feature that strengthens automated quality gates by adding pnpm audit to the check script, v8 coverage thresholds with per-directory auto-ratchet (domain 96%, adapters 71%, persistence 87%), Biome cognitive complexity enforcement (max 15), and keyboard accessibility for the combatant row, while cleaning up all blanket biome-ignore comments, refactoring 5 overly complex functions into smaller helpers, and codifying the early-enforcement principle in the constitution and CLAUDE.md

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

package.json

@@ -3,6 +3,7 @@
 	"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",
@@ -20,6 +21,6 @@
 		"test:watch": "vitest",
 		"knip": "knip",
 		"jscpd": "jscpd",
-		"check": "knip && biome check . && tsc --build && vitest run && jscpd"
+		"check": "pnpm audit --audit-level=high && knip && biome check . && tsc --build && vitest run && jscpd"
 	}
 }