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openspec/changes/enterprise-gaming-r3f-combat/proposal.md

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+# OpenSpec Change: enterprise-gaming-r3f-combat
+
+- **Change ID**: enterprise-gaming-r3f-combat
+- **Package**: `@suaveplan/r3f-combat`
+- **Category**: gaming/gameplay
+- **Target path**: `gaming/gameplay/r3f-combat`
+- **Status**: PROPOSED
+- **Date**: 2026-04-24
+
+---
+
+## Summary
+
+Deliver `@suaveplan/r3f-combat` on the genesis branch from scratch at enterprise quality. The package is the R3F rendering layer for `@suaveplan/combat`: hitbox debug wireframes (per-bone capsule/sphere overlays toggled by flag), projectile trail meshes (instanced `TubeGeometry` with fade-out), muzzle flash billboard sprites, impact effect particle bursts (pooled instanced meshes), and floating damage numbers (billboarded Text via `@react-three/drei`). All effects are event-driven, subscribing to `@suaveplan/combat` and `@suaveplan/weapons` event buses. Genesis adds 100% coverage and Storybook stories.
+
+---
+
+## Available workspace deps
+
+`@suaveplan/combat`, `@suaveplan/weapons`, `@suaveplan/hitbox`, `@suaveplan/error`, `@suaveplan/types`, react, `@react-three/fiber`, `@react-three/drei`, three.
+
+---
+
+## Public API surface
+
+```ts
+function HitboxDebug(props: HitboxDebugProps): JSX.Element
+// entityId, color, opacity, visible
+
+function ProjectileTrails(props: ProjectileTrailsProps): JSX.Element
+// maxTrails, fadeTime, color
+
+function MuzzleFlash(props: MuzzleFlashProps): JSX.Element
+// weaponRef, duration, intensity
+
+function ImpactEffects(props: ImpactEffectsProps): JSX.Element
+// poolSize, particleCount, gravity
+
+function DamageNumbers(props: DamageNumbersProps): JSX.Element
+// floatHeight, duration, criticalColor, normalColor
+
+function CombatEffectsProvider(props: PropsWithChildren): JSX.Element
+// subscribes to combat events; required ancestor
+
+function useCombatEffects(): CombatEffectsCon```text
+
+---
+
+## File layout
+
+```text
+gaming/gameplay/r3f-combat/
+  package.json / tsconfig.json / vitest.config.ts
+  src/
+    index.ts / error-codes.ts
+    types/common.ts + md
+    context/combat-effects-provider.tsx + md + test
+    hooks/use-combat-effects.ts + md + test
+    components/
+      HitboxDebug/ (tsx + md + test + stories + index)
+      ProjectileTrails/ (tsx + md + test + stories + index)
+      MuzzleFlash/ (tsx + md + test + stories + index)
+      ImpactEffects/ (tsx + md + test + stories + index)
+      DamageNumbers/ (tsx + md + test + stories + index)
+  tests/integration.test.ts
+```