# Collider Authoring Diagnostics - 2026-07-12

Issue: Gitea #26 (`BS-JD-305`)

## Outcome

Collider authoring exposes one consistent health result to the inspector, Collider viewport,
Diagnostics panel, and physics placement preflight. Shape changes preserve useful dimensions and
remain one typed undo operation.

## Contract

- Authored box, sphere, and capsule overlays include actor world scale.
- Static mesh colliders show cooked runtime bounds when available.
- Green is ready, cyan is a trigger, gray is disabled, amber is warning/stale, and red is invalid
  or missing.
- Invalid dimensions and mesh references block dependent workflows. Missing hydration and
  colliders over 1,000 meters in world extent are warnings.
- Physics placement consumes the same collider-health checks instead of maintaining a separate
  prerequisite definition.

## Work

- [x] Add shared authored/runtime collider diagnostics and focused fixtures.
- [x] Add shape/status-aware viewport overlays and selected-collider HUD state.
- [x] Add inspector health/repair feedback and dimension-preserving undoable shape switching.
- [x] Add scene-wide selectable collider findings to Diagnostics.
- [x] Reuse diagnostics in physics placement prerequisites.
- [x] Add a committed non-blocking showcase scene and update documentation.
- [x] Run source gates and live Wayland acceptance; packaged tests remain skipped by request.
- [x] Commit, push, attach native Gitea evidence, close #26, and close M3 when empty.
