fix(skills): audit descriptions — trim routing prose, fix stale facts, add missing triggers (#1990)

* fix(skills): audit descriptions — trim routing prose, fix stale facts, add missing triggers

Descriptions are the always-loaded routing tier; this audit rebuilds them on
one principle: discriminate by input shape, not pipeline internals.

- Trim creation-workflow descriptions to positive trigger + nearest-neighbor
  disambiguation + /hyperframes escape hatch; full routing prose already
  lives in each skill body's route-confirm block and the router
- Codify the workflow-vs-domain split as ownership (owns the end-to-end
  deliverable vs capability layer pulled in mid-flight) in /hyperframes,
  and widen "make me a video" framing to deck / composition port
- Fix stale facts: embedded-captions identity count (desc 32, body 17 →
  actual 36 = 10 classic + 26 themed), six→ten visual languages, retired
  RVM/Standard wording in router details, figma shader transport
  (MCP → MCP source / native export), keyframes "cursor demos" (no backing
  content), hyperframes-media scripts/audio.mjs leak
- Register missing capabilities: motion-graphics maps category (was in
  categories/ but absent from its own table, description, and router),
  asset-fusion + news triggers, slideshow page-to-deck + presenter mode,
  general-video editing, talking-head-recut 16:9/9:16/4:5 canvas,
  cli feedback + lambda sites, product demos, mood-brief BGM generation
- website-to-video: relabel promo-shaped video types to keep the promo
  boundary with /product-launch-video; drop headless-Chrome wording
- music-to-video: lyric timing via /hyperframes-media transcription or
  user-supplied lyrics, placed on the beat grid
- Sync catalogs in lockstep (CLAUDE.md, AGENTS.md, README,
  docs/guides/skills.mdx, CLI project templates): add music-to-video +
  slideshow entries, complete the domain-skill lists, and extend the
  catalog-maintenance rule to cover AGENTS.md and the templates

Validated with a 35-case description-only routing eval: 35/35 both before
and after the rewrite (including new maps / asset-fusion / news probes).

* fix(skills): post-media-v2 consistency — stale media ref, router figma wording, catalog rows

- music-to-video: lyric transcription now routes to /media-use (the
  retired /hyperframes-media was still referenced)
- router capability map: figma row gains the shaders fact (MCP source /
  native export), matching the SKILL.md source of truth
- media-use catalog rows (CLAUDE.md, README, docs/guides/skills.mdx):
  add image models + captioning, aligning with the v2 description
- catalog rule #1: root AGENTS.md carries the workflow list only (it
  has no domain-skill section) — rule wording now says so

skills/general-video/SKILL.md

@@ -1,13 +1,10 @@
 ---
 name: general-video
 description: >
-  The fallback workflow for authoring custom HyperFrames video compositions at
-  any length or format — longer or multi-scene pieces, brand / sizzle reels,
-  montages, title cards, static loops, and freeform compositions. Input- and
-  length-agnostic. If a specialized workflow clearly fits the input — a
-  marketed product, a website, a topic explainer, a GitHub PR, existing
-  footage, a short motion graphic, or a Remotion port — prefer it (see
-  /hyperframes); use this only as the general fallback when none fit.
+  The fallback workflow for authoring or editing any custom HyperFrames composition at any
+  length or format — longer / multi-scene pieces, brand and sizzle reels,
+  montages, title cards, static loops, freeform builds. Use only when no
+  specialized workflow fits the input; routing table at /hyperframes.
 metadata: { "tags": "orchestrator, general-video, fallback, freeform, composition-authoring" }
 ---