plan: M7 (rig aliases, world backdrops, templates) + sequencing/beat-sync backlog

PLAN.md

@@ -244,3 +244,22 @@ Orchestrator loop (Fable, this session or any MESHGOD/SCENEGOD session):
 read `logs/*.md` → answer BLOCKED/REQUESTS by editing `lanes/*.md` (append a
 dated **ORCHESTRATOR UPDATE** section) → run the SYNC integration when all
 three logs report their milestone DONE.
+
+**M7 — MAKE IT USABLE (from the 2026-07-25 orchestrator review of the live app)**
+Run ONE LANE AT A TIME, orchestrator syncs between each.
+- **M7-A (Lane A)**: (1) *non-mixamo rig support* — bone-alias layer in
+  room3d.js so CC_Base_*/Rokoko/HumanIK-Unreal/Rigify skeletons retarget with
+  the existing world-delta bake (lady.glb literally cannot be animated today);
+  clear error when <8 bones pair. (2) *world-integrated backdrops* — plate
+  auto-fit to camera frustum, floor tinted from the plate's bottom rows, fog
+  from its average colour (keyable `fog` param), grid fades out. Plates
+  currently read as billboards floating in a void.
+- **M7-C (Lane C)**: starter templates — `templates/*.json` + `GET /templates`
+  and `GET /templates/{name}`; ship 3 that load into a working shot
+  ("two-hander golden hour", "DJ booth + crowd wall", "empty stage").
+- **M7-B (Lane B)**: "New from template" in the scene bar (picker → load),
+  plus a `?` shortcuts overlay listing the real keymap.
+Backlog beyond M7 (orchestrator review): multi-shot SEQUENCING (a film is
+currently one continuous scene; needs an ordered shot list + server-side
+concat), and BEAT-SYNC (demucs/beat grid on MODELBEAST → snap keys and cuts
+to the beat; the killer feature for 90sDJsim music videos).