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DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

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Claude Code v2.1.120

claude ultrareview CLI Subcommand

What

Run a cloud-hosted multi-agent code review directly from the command line, without entering an interactive session.

Usage
claude ultrareview              # review current branch
claude ultrareview 42           # review PR #42
claude ultrareview main         # review against a base branch
claude ultrareview --json       # print raw bugs.json payload
claude ultrareview --timeout 45 # wait up to 45 minutes (default: 30)
Details
  • Launches a remote multi-agent session that finds and verifies bugs in your branch
  • Prints live progress (found, verified, refuted counts) to stderr while waiting
  • Outputs formatted findings with file paths, line numbers, and severity (🔴 normal, 🟡 nit, 🟣 pre-existing)
  • Ctrl-C cancels the wait but leaves the remote review running — a URL is printed so you can view it in the browser
  • The /ultrareview slash command existed previously; this adds it as a top-level CLI entry point
Evidence

CLI command registered via .command("ultrareview [target]") with .description("Run a cloud-hosted multi-agent code review...") — search for "ultrareview [target]"

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

See this entry in the whole of v2.1.120 →