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: 73.7%. Bars are scaled to that peak, not to 100%.
Which agents
| Claude Code | Anthropic | 103 | 32.4% |
| GitHub Copilot | GitHub | 3 | 0.9% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
04eadbd3test(convert): regression eval for generated outputs + app contracts; fix Claude Code128565a8fix(install): refuse --path only for colliding tools; re-land installer teClaude Code3febe026fix(lib): get_field strips a quoted YAML scalar's outer quotes so quoted sClaude Code95cd0669Add Data Engineer, Technical Writer, and Developer Advocate agentsGitHub Copilot62a7c42dUpdate integrations/claude-code/README.mdGitHub Copilot86575914Update integrations/antigravity/agency-senior-project-manager/SKILL.mdGitHub Copilot
What was excluded
| Commits in window | 404 |
| Merge commits removed | −86 |
| CI / dependency bots removed | −0 |
| Considered | 318 |
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 msitarzewski/agency-agents