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: 56.5%. Bars are scaled to that peak, not to 100%.
Which agents
| GitHub Copilot | GitHub | 236 | 31.1% |
| Claude Code | Anthropic | 3 | 0.4% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
54fba960wslc: keep image list json CreatedSince locale-invariant (#41609)GitHub Copilot04904bf3Pre merge Localization strings prior to GA (#41585)GitHub Copilot0b0a1435wslc: add --all-tags to pull for docker parity (#41494)GitHub Copilot2fbf2f5dHandle Linux failures from GNS callbacks (#41396)Claude Code6cb0c085Emit telemetry when create-instance steps exceed 10s (#40269)Claude Code2bd96563Add WSLCVolumes class to track volumes with Docker event-driven synchronizClaude Code
What was excluded
| Commits in window | 762 |
| Merge commits removed | −0 |
| CI / dependency bots removed | −3 |
| Considered | 759 |
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 microsoft/WSL