21st-dev SKILL.md skillC
21st-dev from aicodedecode/awesome-muse-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add aicodedecode/awesome-muse-skills/21st-dev@git:20260930.0d0ec3ePins git:20260930.0d0ec3e in mdr.lock. Pin the fingerprint instead.
- Audit grade
- C, 14 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- aicodedecode/awesome-muse-skills
- Path
skills-imported/21st-dev/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260930.0d0ec3e, committed Sep 30, 2026
- Size
- 3,713 bytes
- Repository stars
- 25
- License
- MIT
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
# 21st.dev — UI component registry skill 21st.dev is a community registry of 12,000+ production-ready React components, templates, shadcn themes and SVG logos. Code is copied into the repo (not a dependency) — search first, install what fits, hand-write UI only when nothing matches. ## Docs (official, fetched 2026-09-30 from https://21st.dev/api/skills/) - `21st-cli-use.md` — search/get/add components via the `21st` CLI; auth, metering, logos - `21st-ai.md` — generate/iterate sketch loop with hosted 21st AI - `21st-registry.md` — publishing components/themes/templates - `21st-design-sync.md` — publish a project's design tokens as a theme Read the relevant doc before acting. ## CLI `npx -y @21st-dev/cli` (bin `21st`). Verified runnable 2026-09-30. ## Auth - **Secure Vault (connected 2026-09-30):** `custom.21st` holds the API key. Never read the real key. Fetch a short-lived surrogate and pass it where the key goes — authd swaps it at egress: ```bash export TWENTYFIRST_TOKEN="$(authdc cred surrogate custom.21st | python3 -c 'import json,sys; print(json.load(sys.stdin)["credentials"][0]["surrogate"])')" npx -y @21st-dev/cli search "animated hero" --limit 5 ``` …
Read the whole file at its exact version.
How to install
mdr add aicodedecode/awesome-muse-skills/21st-dev@sha256:ac96ef85de2a406aThe line at the top of this page pins the label git:20260930.0d0ec3e, 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_aut3pxpe6jg6drvr)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Sep 30, 2026.
Audit of the latest version
- fail: Frontmatter block present
- fail: Frontmatter declares a name
- fail: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (3713 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
Starting a new one? Use a template for SKILL.md on mdpantry, which passes every one of these checks and says what to change in it.
Source
aicodedecode/awesome-muse-skills · 25 stars · license MIT · pushed 2026-10-10 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_aut3pxpe6jg6drvr GET https://markdownregistry.com/api/v1/resolve?ref=aicodedecode/awesome-muse-skills/21st-dev GET https://markdownregistry.com/api/v1/blob/ac96ef85de2a406a7d0c72ec64899df776fe6b340b411791c7c41abb06a60518
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.