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: 2.6%. Bars are scaled to that peak, not to 100%.
Which agents
| Claude Code | Anthropic | 15 | 1.7% |
| GitHub Copilot | GitHub | 3 | 0.3% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
c253f54bfix(openai): correct `reasoning_effort_levels` for gpt-5 and gpt-5.1 profiClaude Code4717cfc8feat(openai): support explicit prompt caching (#38762)Claude Codefd822b07fix(text-splitters): restore lazy imports for heavy optional dependencies Claude Code67fa96ffdocs(groq): remove duplicate `method` block from `with_structured_output` GitHub Copilot5650448afeat(core): incorporate gateway metadata to traces (#39703)GitHub Copilote939c967fix: compaction typo (#35467)GitHub Copilot
What was excluded
| Commits in window | 1,520 |
| Merge commits removed | −0 |
| CI / dependency bots removed | −624 |
| Considered | 896 |
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 langchain-ai/langchain