Is 21st · 21st-dev safe and trustworthy?

tashan scores 21st · 21st-dev on public evidence — tashan score 49.0/100, it is currently active. Audit scope: OSV advisories, install-time scripts, build provenance and declared permission surface. We do not review source code or execute the capability.

How do I install 21st · 21st-dev?

Configure it from its source repository — it is a remote / registry server.

Who maintains 21st · 21st-dev?

source: 21st-dev/claude-code-plugin.

‹ The Index

21st · 21st-dev

plugin

Find, generate, build, explore, review, and publish project-aware UI with seven verified 21st.dev skills plus the remote 21st MCP server.

Works with: Claude Code (native)
native: this artifact type is that client's own format

Category: Design — see all ranked ›

Install (Claude Code):

/plugin marketplace add 21st-dev/claude-code-plugin
/plugin install 21st@21st

tashan score: 49.0
Adoption: 1 repos
Freshness: 94.0
Evidence coverage: 59% of the inputs this score can use — the rest are unknown, and the score is discounted for it
Health: active
GitHub stars: 7
License: Apache-2.0

Security audit

Not scanned yet. We audit npm-published capabilities for known advisories, install-time scripts and permission surface; this one has no npm package we can resolve, or has not reached the queue.

You searched for one. Check the rest of your stack:

npx tashan-cli doctor

Reads the config already on your machine and names what is dead, deprecated or running code at install time. No account, nothing uploaded.

tashan Pro$6/mo

21st · 21st-dev scores 49 today. Pro keeps the series, so you can see whether that is a project getting better or one on its way down.

Every score since we started measuring, for any capability
The named replacement when something you run is dying — not just that it is
tashan doctor over the config you already have, on your machine

Start a 7-day trial › Everything measured on this page stays free.

Show your score

Measured this well? Put the live badge in your README — it updates as the score does.

[![tashan](https://tashan.sh/badge/plugin-21st-dev-claude-code-plugin-21st.svg)](https://tashan.sh/capability/plugin-21st-dev-claude-code-plugin-21st.html)

source ↗ · plugin:21st-dev/claude-code-plugin/21st

Everything on this page is public evidence and free. What it cannot know is whether you run this — check your whole config, free, in the browser. tashan Pro adds the series behind each row and names a replacement for anything dying.

Already running this? Check your whole config — free, in your browser, nothing installed. Or npx tashan-cli doctor locally, which sends nothing at all.

Measured 2026-09-12 · scorer s5 · how · something wrong here?