suaveplan/openspec/changes/enterprise-gaming-r3f-physics-cascade/proposal.md

OpenSpec Change: enterprise-gaming-r3f-physics-cascade

• Change ID: enterprise-gaming-r3f-physics-cascade
• Package: @suaveplan/r3f-physics-cascade
• Category: gaming/physics
• Target path: gaming/physics/r3f-physics-cascade
• Status: PROPOSED
• Date: 2026-04-24

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Summary

Deliver @suaveplan/r3f-physics-cascade on the genesis branch from scratch at enterprise quality. The package provides cascading physics effects for React Three Fiber: chain-reaction impulse propagation (impact → impulse list → rigid bodies receive forces), structural collapse simulation (rigid-body sleep/wake thresholds), and CascadeZone spatial boundaries that limit propagation extent. Wires to @suaveplan/r3f-physics-rapier via the core PhysicsBackend interface. Genesis adds structured errors, OTel cascade-event counter, and 100% coverage.

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Available workspace deps

@suaveplan/error, @suaveplan/types, @suaveplan/events, @suaveplan/r3f-physics-core, react, @react-three/fiber, three.

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Public API surface

function CascadeZone(props: CascadeZoneProps): JSX.Element
// center, radius, maxPropagations

function useCascade(): CascadeController
// trigger(origin, force, radius): void

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File layout

gaming/physics/r3f-physics-cascade/
  package.json / tsconfig.json / vitest.config.ts
  src/
    index.ts / error-codes.ts
    types/common.ts + md
    core/
      cascade-propagator/ (ts + md + types + test + index)
    context/cascade-provider.tsx + md + test
    hooks/use-cascade.ts + md + test
    components/
      CascadeZone/ (tsx + md + test + stories + index)
  tests/integration.test.ts