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: 15.6%. Bars are scaled to that peak, not to 100%.
Which agents
| Claude Code | Anthropic | 6 | 3.6% |
| GitHub Copilot | GitHub | 2 | 1.2% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
69b2d6fbfix(links): repoint remaining hacktricks .wiki URLs that 404 after book reClaude Codef4c29dbbci: build, wait and merge windows definition PRs inline (no workflow_run/PClaude Codee1930301ci: probe CODEX_FIXER_TOKEN contents/PR write (temporary)Claude Codeac31bceffeat: detect hidden group access via newgrp (gshadow desync) (#625)GitHub Copilot39e47592Auto-merge PR #605 (Chack Agent)GitHub Copilot
What was excluded
| Commits in window | 203 |
| Merge commits removed | −16 |
| CI / dependency bots removed | −20 |
| Considered | 167 |
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 peass-ng/PEASS-ng