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: 14.3%. Bars are scaled to that peak, not to 100%.
Which agents
| OpenAI Codex | OpenAI | 359 | 5.2% |
| Claude Code | Anthropic | 3 | 0% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
1013295cfix: attribut network requests to the exact exec on linux (#29697)OpenAI Codex989f55defeat(network-proxy): experimental local credential broker (#28034)OpenAI Codex6db57689fix(config): address permission profile review follow-ups (#29479)OpenAI Codexef330efffeat(tui): Ctrl+O copy hotkey and harden copy-as-markdown behavior (#16966Claude Code359e17a8fix(tui): reduce startup and new-session latency (#17039)Claude Code0bd31dc3fix(tui): handle zellij redraw and composer rendering (#16578)Claude Code
What was excluded
| Commits in window | 6,952 |
| Merge commits removed | −0 |
| CI / dependency bots removed | −26 |
| Considered | 6,926 |
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 openai/codex