The Agent Skills Directory

[COMMAND_EXECUTION]: The skill instructs the agent to use the @21st-dev/cli utility for tasks such as searching the catalog (21st search), retrieving component code (21st get), and installing items into the project (21st add).
[EXTERNAL_DOWNLOADS]: The CLI fetches UI components, CSS themes, and SVG logos from the vendor's repository and the svgl.app library.
[DATA_EXPOSURE]: The skill documents standard authentication procedures, noting that login tokens are stored locally at ~/.config/21st/auth.json and can be provided via environment variables (TWENTYFIRST_TOKEN or API_KEY_21ST).
[INDIRECT_PROMPT_INJECTION]: The skill processes external data from the 21st.dev registry (search results and component code) which is then used to write files or install dependencies.
Ingestion points: Data retrieved via 21st search, 21st get, and 21st add commands.
Boundary markers: None explicitly defined in the instructions.
Capability inventory: The tool can write to the filesystem (components/ui/) and install Node.js packages via the project's package manager.
Sanitization: Standard CLI and package manager validation is assumed for the vendor's registry.

21st-cli-use