feat(character-animation): add local rigged character pipeline

New beta pipeline for reusable cartoon characters with SVG rigs, pose
libraries, action timelines, and Canvas/Remotion/HyperFrames rendering.

- pipeline_defs/character-animation.yaml: 11-stage manifest
- skills/pipelines/character-animation/: 11 stage director skills
- tools/character/: BaseTool implementations for char design, rigging,
  pose libraries, action timelines, previews, and QA
- schemas/artifacts/{character_design,rig_plan,pose_library,
  action_timeline,character_qa_report}.schema.json: canonical artifacts
- schemas/artifacts/scene_plan.schema.json: extended for character-led
  scenes
- .agents/skills/{canvas-procedural-animation,character-animation-qa,
  character-rigging,pose-library-design,svg-character-animation}/:
  Layer 3 vendor knowledge
- AGENT_GUIDE / PROJECT_CONTEXT / README / ARCHITECTURE / PROVIDERS:
  surface the new pipeline and its capability family
- tools/video/hyperframes_compose.py: SVG character rig support
- tests/contracts/test_character_animation_pipeline.py: contract tests

AGENT_GUIDE.md

@@ -230,6 +230,7 @@ If the folder has tracks, the proposal and asset stages should present them as o
 | `podcast-repurpose` | Podcast highlights and derivatives | beta |
 | `cinematic` | Trailer, teaser, and mood-led edits | production |
 | `animation` | Motion-graphics and animation-first videos | production |
+| `character-animation` | Local rigged cartoon characters and reusable character acting | beta |
 | `hybrid` | Source footage plus support visuals | production |
 | `avatar-spokesperson` | Presenter-led avatar or lip-sync videos | production |
 | `localization-dub` | Subtitle, dub, and translated variants | beta |
@@ -361,7 +362,7 @@ print('HyperFrames note:', info.get('hyperframes_note'))
 |--------|----------|----------|
 | **FFmpeg** | Video-only cuts, concat, trim, subtitle burn | `ffmpeg` binary (always available) |
 | **Remotion** | React-based composition: still images → animated video, text cards, stat cards, charts, callouts, comparisons, transitions with spring physics, word-level caption burn, TalkingHead avatar | Node.js (`npx`) + `remotion-composer/` + `node_modules` |
-| **HyperFrames** | HTML/CSS/GSAP composition: kinetic typography, product promos, launch reels, website-to-video, registry-block-driven scenes | Node.js ≥ 22 + FFmpeg + `npx` (consumed via `npx @hyperframes/cli`) |
+| **HyperFrames** | HTML/CSS/GSAP composition: kinetic typography, product promos, launch reels, website-to-video, registry-block-driven scenes, SVG character rigs | Node.js ≥ 22 + FFmpeg + `npx` (consumed via `npx hyperframes`) |
 
 `render_runtime` is **locked at proposal** (`proposal_packet.production_plan.render_runtime`) and **carried through edit_decisions unchanged**. `video_compose` routes based on this field; silent runtime swaps are forbidden. If the chosen runtime becomes unavailable at compose time, surface a structured blocker per "Escalate Blockers Explicitly" above. See `skills/core/hyperframes.md` for the Remotion-vs-HyperFrames decision matrix.
 
@@ -448,6 +449,7 @@ Key capability families to look for in the output:
 - **audio_processing** — Mixing, enhancement (FFmpeg-based, always local).
 - **analysis** — Transcription, scene detection, frame sampling.
 - **avatar** — Talking head and lip sync generation.
+- **character_animation** — Local character specs, SVG rigs, pose libraries, action timelines, previews, and QA.
 - **enhancement** — Upscale, background removal, face enhance, color grading.
 
 Each tool in the registry declares `best_for`, `install_instructions`, `runtime` (LOCAL, API, LOCAL_GPU, HYBRID), and `status`. Read these fields — do not assume tool strengths from memory.
@@ -637,6 +639,7 @@ The `.agents/skills/` directory is large. When you're not coming in through a to
 |---|---|
 | **Composition runtime** | `remotion`, `remotion-best-practices`, `synthetic-screen-recording` (fake terminal/UI demos via Remotion TerminalScene) |
 | **Animation knowledge (generic)** | `gsap-core`, `gsap-timeline`, `gsap-plugins` (SplitText / MorphSVG / DrawSVG / MotionPath / Flip / CustomEase), `gsap-utils`, `gsap-react`, `gsap-performance`, `gsap-scrolltrigger`, `gsap-frameworks`, `framer-motion` (Disney 12 principles), `lottie-bodymovin` (Lottie export) |
+| **Character animation** | `character-rigging`, `svg-character-animation`, `pose-library-design`, `canvas-procedural-animation`, `character-animation-qa` |
 | **Image generation** | `bfl-api`, `flux-best-practices` |
 | **Video generation** | `seedance-2-0` (preferred premium default — cinematic, trailer, multi-shot, synced audio, lip-sync), `ai-video-gen`, `ltx2` |
 | **Audio** | `elevenlabs`, `music`, `sound-effects`, `acestep`, `text-to-speech`, `setup-api-key` |