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: 42.2%. Bars are scaled to that peak, not to 100%.
Which agents
| Cursor Agent | Anysphere | 57 | 14.7% |
| Claude Code | Anthropic | 18 | 4.6% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
13783657fix(ui): keep sidebar scroll when switching emails (#3677)Cursor Agentb039b368fix(editor): preserve paragraph styles when splitting with Enter (#3705)Cursor Agentffe60581chore(docs): remove corepack from contributing guide (#3700)Cursor Agent3849ea00fix: bump next to 16.3.3 for the August 2026 security release (#3723)Claude Code8661714ffix: update check-spam inline snapshot for DCC_CHECK flag (#3702)Claude Code730b2ca8fix(editor): stop containerEnforcer racing collaborative initial sync (#36Claude Code
What was excluded
| Commits in window | 535 |
| Merge commits removed | −0 |
| CI / dependency bots removed | −147 |
| Considered | 388 |
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 resend/react-email