Mimir/state/scratch.md

# Scratch

## Current Subgoal

No active scratch subgoal.

## Notes

- Viable stream app contract promoted to docs/map/evidence: Fensalir hosts one
  five-second in-memory runtime, local/networked feeds append as producers, and
  OBS receives synchronized program outputs.
- Mimir app scaffold now lives in `Mimir.slnx` with `src/Mimir.App` and
  `src/Mimir.Runtime`; Fensalir remains an external project reference.
- Synchronization ownership started moving into `Mimir.Runtime`: hub, stream
  descriptors, per-stream rolling buffers, settings, and source adapter seam are
  in C# now; concrete capture adapters are next.
- Local six-camera ingest should stay close to the metal: native push sources
  carry payload handles into buffers; process sources are network/diagnostic
  compatibility, not the main local camera path.
- `MimirVideoFrameDescriptor` is the hot-path video descriptor for native camera
  workers. Leap stereo IR should push device timestamps/handles through it.
- `IMimirVideoCaptureDriver` is the live driver seam. Future Leap/Windows
  camera adapters should target that.
- Keep scratch short and disposable.
- Promote only durable lessons into `state/evidence.jsonl` or the map.