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: 9.5%. Bars are scaled to that peak, not to 100%.
Which agents
| GitHub Copilot | GitHub | 14 | 8% |
| Claude Code | Anthropic | 2 | 1.1% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
d3b875f0[WIP] Add Eclipse to development tools list (#1029)GitHub Copilotc6d4ecae[WIP] Add VSCodium to IDE section in applications.json (#1027)GitHub Copilot449ddc76[WIP] Remove ndm from the applications list due to discontinuation (#1026)GitHub Copilot6579a145Add MacNTop - macOS menu bar system monitor with retro CRT aesthetics (#10Claude Code42e10656Add Vercel Deployment Menu Bar (#981)Claude Code
What was excluded
| Commits in window | 180 |
| Merge commits removed | −6 |
| CI / dependency bots removed | −0 |
| Considered | 174 |
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 serhii-londar/open-source-mac-os-apps