| name | manim-scene-craft |
| description | Trigger when: (1) the user mentions "manim", "scene", "video", "EN/KO render",
"GEODE_HERO_LANG", "1080p60", or (2) editing files under
`scripts/visualizations/` ending in `.py`, or (3) the user asks to render,
re-render, or extend any of the four validated scenes (`geode_hero.py`,
`autoresearch_filewalk.py`, `autoresearch_compare.py`, `critical_floor.py`).
GEODE Manim Scene authoring standard. Locks the patterns the four validated
scenes already share — Anthropic-style palette, Helvetica Neue + Pretendard
font pairing with weight=NORMAL, EN/KO multilingual lang via
`GEODE_HERO_LANG` env, `_dashed_arrow_with_head` stage-coupled tinting,
`verify_hero_layout.py` ratchet — so the next scene does not re-discover
the kerning / padding / transition regressions catalogued in
[[viz-frame-audit]].
|
Manim Scene Craft
Use before writing a scene or changing render, font, arrow, or layout
constants. Skip this skill for changelog, documentation, or non-visual code.
Core invariants
The five rules below are non-negotiable. Detailed rationale + code lives in
rules/.
- Single text entry point. All
Text(...) calls go through _make_text
so the EN/KO font + weight=NORMAL lock can't slip. Raw Text( is a
regression. See rules/scene-skeleton.md.
- Padding safe zones. Box + header + outline lines arrange as a single
VGroup(...).arrange(DOWN, buff=...).next_to(body.get_top(), DOWN, buff=...)
— never as separate move_to calls. See rules/safe-zones.md.
- Section transitions in one play.
_set_section_title bundles
FadeOut(prior title) + FadeOut(prior content) + FadeIn(new title) into a
single self.play(...) so transitions don't show a 0.5–0.8 s empty frame.
See rules/scene-skeleton.md.
- Arrow labels perpendicular. Arrow labels offset ≥ 0.5 perpendicular to
the arrow direction.
UP * 0.25 from center is forbidden — near-vertical
dashed lines slice through the glyphs. See rules/safe-zones.md.
- Layout ratchet on every box. Every new container + text pair gets a
Site(...) entry in verify_hero_layout.py. Run --update-baseline
locally, commit layout_baseline.json. See rules/layout-ratchet.md.
File map
| File | Purpose |
|---|
| rules/scene-skeleton.md | Imports, palette, _t, _make_text, _set_section_title, Bit construction order |
| rules/safe-zones.md | Padding rules, arrow geometry, canvas edge limits, _dashed_arrow_with_head |
| rules/multilingual-render.md | EN/KO lang switch, render commands, output paths, ~/Downloads/ copy |
| rules/layout-ratchet.md | verify_hero_layout.py SITES + baseline JSON + CI step |
| references/data-sot.md | Which markdown SoT each scene reads from + parity rules |
| references/pre-pr-checklist.md | 5-item grep checklist before pushing |
| references/external-oss.md | adithya-s-k/manim_skill (mobject API reference) + other OSS, with stars / last-push verified 2026-05-21 |
Pre-flight
uv add manim --dev && uv sync
brew install pkg-config cmake
brew install --cask font-pretendard
uv run python scripts/visualizations/verify_hero_layout.py --static-check
--static-check validates the committed layout_baseline.json without
importing Manim — fast CI gate.
Standard render
uv run manim -qh -o <Name>-EN scripts/visualizations/<file>.py <SceneClass>
GEODE_HERO_LANG=ko uv run manim -qh -o <Name>-KO scripts/visualizations/<file>.py <SceneClass>
cp media/videos/<file>/1080p60/<Name>-{EN,KO}.mp4 ~/Downloads/
After render, run the post-mortem audit workflow in [[viz-frame-audit]].
Workflow differentiator
adithya-s-k/manim_skill (874★) is the recommended external reference for
the general ManimCE API. This skill layers GEODE-specific patterns on top
that the external skill does not cover: EN/KO lang switch, Helvetica Neue +
Pretendard pairing with weight=NORMAL lock, Anthropic-style 6-color palette,
verify_hero_layout.py ratchet, _dashed_arrow_with_head stage-coupled head
tinting, and the 12+ defect catalogue from four validated scenes.
The defect catalogue (filewalk × 5, hero × 7) lives in
[[viz-frame-audit]]'s references/defect-catalogue.md.
