> ## Documentation Index
> Fetch the complete documentation index at: https://docs.pnbr.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Work with your agent

> Let your agent look up the same product guidance you read here.

Start in [the Penumbra app](https://app.pnbr.io). Its
[setup skill](https://app.pnbr.io/skills/penumbra-setup/SKILL.md) guides your
coding agent through installation and connection.

## Find guidance for the job

After connecting the CLI, use:

```sh theme={null}
penumbra grammar search "extract documents and review the results"
penumbra grammar show extract-files
```

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](https://docs.pnbr.io/understand/how-penumbra-fits-together.md#reading-the-grammar)
explains the distinction between this product guidance and your project's
domain grammar.

Read [credentials](https://docs.pnbr.io/concepts/credential.md) to understand the authority your agent
uses, and [approvals](https://docs.pnbr.io/concepts/approval.md) for changes that need a person's decision.


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