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Programmatic video creation in React with Remotion.
Passed 20 of 22 test cases with the skill, and 7 of 22 without it.
and 10 more in the full report
13 fixed7 passed either way2 still failing0 broke
Tokens, turns and time describe resource use, not a dollar price.
One of 13 test cases the skill fixed. Same model, same prompt, with and without the skill.
Which sub-skill file handles video clip trimming and sequence transition effects within the React markup?
| Checked | Without skill | With skill |
|---|---|---|
| Identifies remotion-markup/remotion-markup.md for video trimming and transitions | Missed | Passed |
The instructions your model reads when the skill loads.
This skill is a router for all Remotion video-creation operations. It mirrors the upstream remotion-dev/skills repository. Based on user intent, read the corresponding sub-skill SKILL.md before executing.
Sub-skills are authoritative. The files under each sub-skill directory are upstream content kept verbatim — do not edit them; re-sync from upstream instead. The table below is the index, the sub-skill SKILL.md is the instruction.
| Sub-skill | Entry | Use When |
|---|---|---|
| New Project | remotion-create/remotion-create.md | Scaffold a new Remotion project (npx create-video), design a video, start the Studio preview |
| React Markup | remotion-markup/remotion-markup.md | Writing Remotion React markup — the core: animations, media, sequences, timing, fonts, effects, maps, Lottie, DOM measurement, transitions, trimming |
| Rendering | remotion-render/remotion-render.md | Rendering videos and stills (npx remotion render/still), transparent videos |
| Captions | remotion-captions/remotion-captions.md | Transcribing, importing SRT, and displaying captions/subtitles |
| Interactivity | remotion-interactivity/remotion-interactivity.md | Making animations editable in Remotion Studio Visual Mode |
| SaaS / Apps | remotion-saas/remotion-saas.md | Building video apps — <Player>, rendering on Lambda/Vercel/Cloudflare/Node, client-side rendering, choosing a framework |
| Mediabunny | mediabunny/mediabunny.md | Multimedia handling in the browser — get audio/video duration, get video dimensions |
<name>/<name>.md, denested from SKILL.md so sub-skills are not auto-discovered), then follow any references/-style .md files it points to (each sub-skill folder carries its own detail files).../remotion-markup/remotion-markup.md — these resolve within this remotion/ directory.Some upstream sub-skill files contain links like [Remotion Best Practices](../remotion-best-practices/remotion-best-practices.md). remotion-best-practices/ is a local shim (not an upstream sub-skill) that forwards to this top-level router — treat those links as "go back to the Remotion router" (i.e. this file). All other sibling cross-references (../remotion-markup/remotion-markup.md, ../remotion-captions/remotion-captions.md, etc.) resolve correctly.
test cases passed, vs 7 / 22 without
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