motion-editor SKILL.md skillA
motion-editor from cowork-os/cowork-os is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add cowork-os/cowork-os/motion-editor@v1.0.0Pins v1.0.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- cowork-os/cowork-os
- Path
resources/skills/motion-editor/SKILL.md- Versions recorded
- 1
- Latest version
- v1.0.0, committed Oct 7, 2026
- Size
- 8,490 bytes
- Repository stars
- 535
- License
- MIT
Build a local, offline motion-design editor app (After Effects / Screen Studio-lite) with scenes, layers, keyframes, spring easing, presets, stagger, a cursor layer, timeline, undo/redo, save/open, and deterministic MP4 export via Playwright + ffmpeg. The deliverable is the editor itself, not a video.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Motion Editor ## Before starting Confirm the target folder and the user's OS (adapt shortcuts: Ctrl on Windows/Linux, Cmd on macOS). Phases span many steps: keep a `PROGRESS.md` in the project noting what's built and which verifications passed. If an essential ambiguity remains, ask the user — the requirements below take priority over any outside source. <goal> Build a local motion-design editor app. The deliverable is the EDITOR ITSELF, not a video. Do NOT invent a video concept, create demo content, or render anything automatically. On first launch, open an empty project. Rendering happens only when the user clicks Export. </goal> <environment> - Windows, macOS or Linux; Node 20+, ffmpeg available in PATH. - Stack: Vite + React + TypeScript frontend, small local Node (Express) server for filesystem access and render jobs. Zustand for state, zod for project schema validation. - No AI/API calls at runtime. Editing, playback, undo/redo, saving must work fully offline. - Run: `npm install && npm run dev`. CLI render: `npm run render -- <projectFolder> <out.mp4>`. - If you deviate from this stack, justify it in README. </environment> <architecture> …
Read the whole file at its exact version.
How to install
mdr add cowork-os/cowork-os/motion-editor@sha256:4c766f50e13642c3The line at the top of this page pins the label v1.0.0, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_alpmq2naeebnszuc)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Oct 7, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (8490 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
cowork-os/cowork-os · 535 stars · license MIT · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_alpmq2naeebnszuc GET https://markdownregistry.com/api/v1/resolve?ref=cowork-os/cowork-os/motion-editor GET https://markdownregistry.com/api/v1/blob/4c766f50e13642c30b8dd6fdc43ba0efc370b75b88a07e228a4924d714bd6e0b
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.