Command reference ยท Claude Code
/ultrareview
The actual command is now code-review ultra; ultrareview is just a deprecated alias.
/code-review ultra starts a deep multi-agent code review in a Claude Code on the web cloud sandbox: a fleet of reviewer agents checks the change in parallel and verifies each finding against the actual code. /ultrareview was the original name; it still works, but is now just a deprecated alias for /code-review ultra.
Without an argument, the command compares the current branch against the default branch, including uncommitted/staged changes; a local git repository is enough for this, a GitHub remote isn't required. A branch name changes the comparison base. With a PR number instead of a branch name, it checks a GitHub pull request directly, without uploading anything locally; this requires a repository on github.com or GitHub Enterprise Server.
The check runs in the background (progress via /tasks) and takes about 5 to 10 minutes. On Pro and Max, 3 runs are free, after that usage credits apply.
โ WHEN TO USE IT?
A deeper check than the local review before merging a larger change
Run /code-review ultra on your own branch before merging a large feature branch.
Deeply reviewing a GitHub pull request independent of your own checkout
/code-review ultra 1234 to check PR #1234 directly from the cloud, without checking out the branch locally.
โ WHEN NOT TO?
A quick, local review of small changes
the cloud run takes 5 to 10 minutes and costs usage credits after the 3 free runs; overkill for a quick look
Better: use the local /code-review, or ask Claude directly to look over the diff
Use at zero-data-retention organizations or on Amazon Bedrock/Google Cloud/Microsoft Foundry
Ultrareview needs Claude Code on the web's cloud infrastructure and isn't available there
Better: use the local /code-review with a high effort level
SOURCES
- Claude Code docs (official) โ code.claude.com
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