# OpenSpec Change: enterprise-gaming-r3f-pathfinding

- **Change ID**: enterprise-gaming-r3f-pathfinding
- **Package**: `@suaveplan/r3f-pathfinding`
- **Category**: gaming/gameplay
- **Target path**: `gaming/gameplay/r3f-pathfinding`
- **Status**: PROPOSED
- **Date**: 2026-04-24

---

## Summary

Deliver `@suaveplan/r3f-pathfinding` on the genesis branch from scratch at enterprise quality. The package provides NavMesh pathfinding and crowd simulation for React Three Fiber: `NavMeshProvider` that bakes a walkable NavMesh from scene geometry, A* pathfinding with funnel-algorithm string-pull, `SteeringAgent` applying seek/flee/arrive/separation/cohesion behaviours, a `Crowd` component managing N agents with local avoidance (ORCA), and `NavMeshDebug` wireframe overlay. `usePathfinding()` exposes `findPath`, `addAgent`, `removeAgent`. Genesis adds 100% coverage and Storybook stories.

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## Available workspace deps

`@suaveplan/spatial-hash`, `@suaveplan/error`, `@suaveplan/types`, `@suaveplan/events`, react, `@react-three/fiber`, `@react-three/drei`, three.

---

## Public API surface

```ts
function NavMeshProvider(props: NavMeshProviderProps): JSX.Element
// geometry, cellSize, cellHeight, agentRadius, agentHeight

function NavMeshDebug(props: NavMeshDebugProps): JSX.Element
// visible, color, opacity

function SteeringAgent(props: SteeringAgentProps): JSX.Element
// agentId, target, maxSpeed, behaviours

function Crowd(props: CrowdProps): JSX.Element
// agents, maxAgents, timeStep

function usePathfinding(): PathfindingContext
// findPath(from, to), addAgent(config), removeAgent(id), navMesh
```

---

## File layout

```text
gaming/gameplay/r3f-pathfinding/
  package.json / tsconfig.json / vitest.config.ts
  src/
    index.ts / error-codes.ts
    types/common.ts + md
    nav/ (navmesh-builder.ts + md + test, astar.ts + md + test, funnel.ts + md + test)
    steering/ (behaviours.ts + md + test, orca.ts + md + test)
    context/pathfinding-provider.tsx + md + test
    hooks/use-pathfinding.ts + md + test
    components/
      NavMeshDebug/ (tsx + md + test + stories + index)
      SteeringAgent/ (tsx + md + test + stories + index)
      Crowd/ (tsx + md + test + stories + index)
  tests/integration.test.ts
```