Adoption is broad. Many contributors are committing agent-authored work, which is what a real organisational rollout looks like.
Assisted or autonomous
Assisted — a developer’s identity authored the commit and the agent added itself as co-author. The agent ran git commit during a working session, with a person there. Autonomous — a bot identity is the author, no human in the loop. Across the whole index, 93.7% of agent commits are assisted.
Agent share by month
Peak month: 14.6%. Bars are scaled to that peak, not to 100%.
Which agents
| Claude Code | Anthropic | 33 | 3.3% |
| Cursor Agent | Anysphere | 11 | 1.1% |
| GitHub Copilot | GitHub | 8 | 0.8% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
ffe0b67bmodel/textparse: implement OM2 scrape format (#18606)Claude Code96285cacscrape: keep the FQDN lookup out of synctest bubblesClaude Codefa54eb29docs: document annotation positions in promqltestClaude Code87713549tsdb: address review nits on in-order chunk ID wrapCursor Agent01a89a26tsdb: move chunk ID space guard to pushHeadChunkCursor Agentd35e75a5tsdb: fix in-order chunk ID overflow via modular wrappingCursor Agent32cd8f84cmd/prometheus: stabilize TestQueryLog port allocation in parallel subtestGitHub Copilot4c4adeb8fix(nhcb): reuse hBuffer when hashing label setsGitHub Copilot3c2286a0Potential fix for pull request findingGitHub Copilot
What was excluded
| Commits in window | 1,643 |
| Merge commits removed | −516 |
| CI / dependency bots removed | −129 |
| Considered | 998 |
Bots are excluded from the denominator entirely. Counting dependabot as “AI-written code” is the fastest way to produce a meaningless number.
How this was measured
Measured over February–August 2026, cloned directly. Detection is deterministic string matching against signatures agents write about themselves — no heuristics, no style analysis. Merge commits and CI bots are excluded from the denominator. The figure is a floor: squash merges strip trailers, so real usage is higher. Contributor counts are aggregate — no individual is named.
Run it yourself: npx qmmit-cli prometheus/prometheus