motion-design SKILL.md skillA
motion-design from apatheticmioz/castor is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add apatheticmioz/castor/motion-design@git:20261026.5dcc3aePins git:20261026.5dcc3ae in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- apatheticmioz/castor
- Path
skills/motion_design/SKILL.md- Versions recorded
- 1
- Latest version
- git:20261026.5dcc3ae, committed Oct 26, 2026
- Size
- 3,565 bytes
- Repository stars
- 12
- License
- AGPL-3.0
Deterministic programmatic motion graphics pipeline — storyboard JSON, seeded math, pure draw(t), and Playwright+FFmpeg capture with entropy-based fitness.
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 Design Pipeline
A four-stage deterministic pipeline for producing programmatic motion graphics
(HTML5 Canvas / SVG → 60 fps MP4) with **zero** use of `Math.random()` or
wall-clock `Date.now()`. Every frame is a pure function of virtual time `t`.
## Stage 1 — Storyboard JSON Specification
Define the animation as a JSON document:
```json
{
"timeline": { "fps": 60, "duration_s": 4.0 },
"scenes": [
{
"id": "intro",
"start_t": 0.0,
"end_t": 2.0,
"keyframes": [
{ "t": 0.0, "props": { "alpha": 0.0, "scale": 0.5 } },
{ "t": 1.0, "props": { "alpha": 1.0, "scale": 1.0 } }
]
}
]
}
```
- `fps` is fixed at 60.
- `duration_s` is the total timeline length in seconds.
- Each scene has a `[start_t, end_t]` window and one or more keyframes.
- All times are in seconds of **virtual** time (never wall-clock).
## Stage 2 — Deterministic Math & Easing Primitives
All interpolation and randomness must be seeded and reproducible:
| Primitive | Rule |
|-----------|------|
| `lerp(a, b, u)` | `a + (b - a) * u` |
| `cubic-bezier(x1, y1, x2, y2)` | Pre-computed LUT (1024 samples); no iterative Newton at render time |
…Read the whole file at its exact version.
How to install
mdr add apatheticmioz/castor/motion-design@sha256:4cb11e8c4e6555e1The line at the top of this page pins the label git:20261026.5dcc3ae, 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_4f4o7a4uvkgkqdkx)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Oct 26, 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 (3565 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
apatheticmioz/castor · 12 stars · license AGPL-3.0 · pushed 2026-10-27 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_4f4o7a4uvkgkqdkx GET https://markdownregistry.com/api/v1/resolve?ref=apatheticmioz/castor/motion-design GET https://markdownregistry.com/api/v1/blob/4cb11e8c4e6555e1743636ada0c88491e4a0f14429db6a2d2848aba548978293
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.
More from apatheticmioz/castor
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