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Start in the Penumbra app. Its setup skill guides your coding agent through installation and connection.

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Find guidance for the job

After connecting the CLI, use:
The CLI reads the current Grammar from your runtime. In the default MCP connection, the grammar tool accepts howto to look up product guidance. The overview explains the distinction between this product guidance and your project’s domain grammar. Read credentials to understand the authority your agent uses, and approvals for changes that need a person’s decision.