CLAUDE_CODE_ULTRAREVIEW_PR_AS_MERGED

Updated November 9, 2026 by Alex Sorokoletov

CLAUDE_CODE_ULTRAREVIEW_PR_AS_MERGED is a Claude Code environment variable: When set, reviews a pull request as it was merged rather than as it currently stands; if that mode is unavailable, nothing is launched and an error is shown. Added in v2.1.321 and still present in v2.1.321. It is not in the official reference.

How to set it

For one session, export it in the shell that starts Claude Code:

export CLAUDE_CODE_ULTRAREVIEW_PR_AS_MERGED=<value>
claude

To apply it to every session, add it to the env object of a settings file:

// ~/.claude/settings.json
{
  "env": {
    "CLAUDE_CODE_ULTRAREVIEW_PR_AS_MERGED": "<value>"
  }
}

Related variables

• CLAUDE_CODE_ULTRAREVIEW_LAUNCH_RECORD: Path where the ultrareview launch writes the session ID, created as a new file with mode 0600; when set, it also collapses newlines in the command's output.
• CLAUDE_CODE_ULTRAREVIEW_PREFLIGHT_FIXTURE: Points to a test fixture file used during the preflight phase of UltraReview — Claude Code's automated PR review pipeline.
• CLAUDE_CODE_ULTRAREVIEW_QUOTA_FIXTURE: Supplies a fixture for the ultrareview quota (reviews used, limit, remaining, overage) that replaces the live fetch; ignored if it does not parse to that shape.
• ANTHROPIC_BETAS: Comma-separated beta feature headers.
• ANTHROPIC_CUSTOM_HEADERS: Custom HTTP headers (newline-separated Key: Value).
• ANTHROPIC_FEDERATION_RULE_ID
• ANTHROPIC_ORGANIZATION_ID
• ANTHROPIC_WORKSPACE_ID

Frequently asked questions

All variables, searchable: Claude Code environment variables.