GitHub's Copilot usage metrics API now includes two new code-review velocity fields in the `totals_by_ai_adoption_phase` breakdown: `avg_pull_requests_minutes_to_review` (median time from PR creation to first review) and `avg_pull_requests_review_cycles` (median number of review submissions before merge). Both metrics apply only to merged pull requests and are available in enterprise and organization 1-day and 28-day reports. This allows teams to compare review speed and iteration cycles across different AI adoption cohorts, helping quantify Copilot's downstream impact on engineering throughput.

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