Monitor Tool - Claude Code
Background monitoring of logs, files, and long-running processes.
Monitor watches a process, file, or log stream in the background and pushes new output into the conversation as it arrives.
What it does
You hand Monitor a command or a file path and it keeps streaming. Each line of output becomes a notification Claude can react to. It's designed for the "until this condition is true" pattern - tail a deploy log until you see "ready", watch a test file for a green run, or poll a dev server's health endpoint.
When to use it
- Waiting on a deploy or CI job without wasting a
sleeploop. - Tailing a log for a specific event.
- Keeping eyes on a dev server while Claude works on other code.
- Long-running background work where polling would be wasteful.
Gotchas
- Monitor is in preview. Behavior may change between Claude Code releases.
- Very chatty output floods the conversation quickly. Filter at the source.
- Always stop the monitor when you're done or it burns context for nothing.
Official docs: https://code.claude.com/docs/en/tools-reference.md#monitor-tool
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