One person is driving this. The headline number reflects a single contributor's workflow, not a project-wide shift.
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: 3.6%. Bars are scaled to that peak, not to 100%.
Which agents
| GitHub Copilot | GitHub | 3 | 0.5% |
| Claude Code | Anthropic | 2 | 0.3% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
81b6ee5dPg 4 (#2390)GitHub Copilot389ddf60Fix secret references in INCIDENT_RESPONSE.md to match actual DocsGPT confGitHub Copilot1e2443fbUpdate .github/INCIDENT_RESPONSE.mdGitHub Copilot4cf52947(fix)workflow: stable outside-click handler, drop trailing whitespaceClaude Code80d20825Sheet mobile (#2502)Claude Code
What was excluded
| Commits in window | 967 |
| Merge commits removed | −241 |
| CI / dependency bots removed | −104 |
| Considered | 622 |
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 arc53/DocsGPT