Adoption is broad. Many contributors are committing agent-authored work, which is what a real organisational rollout looks like.
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: 61.9%. Bars are scaled to that peak, not to 100%.
Which agents
| GitHub Copilot | GitHub | 533 | 42.6% |
| Claude Code | Anthropic | 18 | 1.4% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
fb4eb04fDocument CLI 1.0.84 and Copilot app 1.1.20 updates in Learning Hub (#3135)GitHub Copilot1899b18ddocs: update Learning Hub for GPT-6 Astra, Vim mode GA, and new plugin CLIGitHub Copilot44423788Update winui external plugin listing to v0.6.0 (#3000)GitHub Copilot61083bdcAdd dev container configuration instructions 🤖🤖🤖 (#2911)Claude Codec46b4a91Add flight-map-canvas extension (#2482)Claude Codec7babcfaAdd foundry-hosted-agent-copilotkit skill (#2226)Claude Code
What was excluded
| Commits in window | 1,600 |
| Merge commits removed | −270 |
| CI / dependency bots removed | −78 |
| Considered | 1,252 |
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 github/awesome-copilot