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/music-to-video/SKILL.md

@@ -1,6 +1,6 @@
 ---
 name: music-to-video
-description: "Use when the user has a music track (an audio file, or a video to pull audio from) and wants a beat-synced HyperFrames video, calm to hard-hitting. The music drives everything: one analyzer reads it once, the orchestrator lays out the frames and fills a per-frame plan, and one sub-agent builds each frame. Typography and templates are the floor — a complete video needs zero assets — but any images or videos the user supplies are cut into the frames on the same beat grid (beat-cut / ken-burns). The genre (lyric video, slideshow, kinetic promo) falls out of the per-frame choices; the pipeline never branches on it."
+description: "Turn a music track (an audio file, a video to pull audio from, or a track generated from a mood brief) into a beat-synced video — lyric video, slideshow, or kinetic promo. The music drives all pacing; any user-supplied images/videos are cut onto the same beat grid, and a complete video needs zero assets. Narrated pieces → the input-matched workflow (see /hyperframes). Unclear → /hyperframes."
 ---
 
 # music-to-video — one music-grounded, beat-synced video workflow
@@ -26,6 +26,8 @@ Goal: Establish the music source, create the HyperFrames project, and note any u
 
 The **music is the spine** — establish one track before anything else. This skill is tuned for **fast, high-energy BGM**: a strong beat grid drives the cuts (calm tracks work, but pace by phrase rather than beat). If the user gave you audio — a music file, or a video to pull the audio from — use it. If not, generate one: choose the mood from the user's description (e.g. "driving synthwave", "trap beat", "upbeat corporate") and produce a track via `/media-use` (`references/bgm.md` — HeyGen retrieval when credentialed, else local Lyria / MusicGen; ElevenLabs or another generator also works). Before generating, run `npx hyperframes auth status` and **relay its output verbatim (don't paraphrase or rewrite it)** — it shows whether BGM comes from HeyGen or local MusicGen and, if not signed in, how to sign in. **If not signed in, STOP and wait for the user to choose — sign in, or continue offline with local MusicGen — before generating the track**; don't write keys into a per-repo `.env`. (In autonomous mode, note the status and continue offline.) See `/media-use` → Preflight for the canonical guidance. Either way the track lands at `assets/bgm.mp3`. Stage any user-supplied images or videos so frames can weave them in on the beat grid; otherwise typography carries the whole video.
 
+**Lyric videos:** for lyrics synced to the vocals, get word/line timing by transcribing the track via `/media-use`, or ask the user for the lyrics text and place lines on the beat grid.
+
 Initialize only if `hyperframes.json` is missing. Name `<project>` from the brief in kebab-case, such as `midnight-drive-loop` — never a timestamp. `init` checks the installed skills against the latest on GitHub and updates the global set if any are out of date.
 
 ```bash