A small group is using agents. Adoption has spread beyond one person but is not project-wide.
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: 62.1%. Bars are scaled to that peak, not to 100%.
Which agents
| Claude Code | Anthropic | 18 | 18.2% |
| GitHub Copilot | GitHub | 8 | 8.1% |
| Cursor Agent | Anysphere | 5 | 5.1% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
573d4f33fix(openapi): drop function-valued properties from generated schemas (#758Claude Code3a77dc4dbuild(deps): upgrade docusaurus to 3.10.2 (#7583)Claude Code4359916fbuild(deps): upgrade lerna to v10 (#7582)Claude Code340811baci(example): fix Playwright e2e ffmpeg failures (#7412)GitHub Copilot492bacf3chore: Add cache checks for openapi router fixtures (#7296)GitHub Copilot59f2cdb3chore: Review stale skills (v11.16.0) (#7295)GitHub Copilot774b244cfix(ci): restore tests package version (#7393)Cursor Agent3c5252ffchore(www): Add Legora to website logos (#7358)Cursor Agent331db6d1build: upgrade drizzle in next-sse-chat example (#7351)Cursor Agent
What was excluded
| Commits in window | 166 |
| Merge commits removed | −0 |
| CI / dependency bots removed | −67 |
| Considered | 99 |
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 trpc/trpc