21%

of 2,054 commits were committed by an AI agent — a floor, not an estimate

21% agent · top contributor 6.9%124 contributors

org-wide

Adoption is broad. Many contributors are committing agent-authored work, which is what a real organisational rollout looks like.

432

agent commits

1,622

human commits

124

agent contributors

6.9%

largest contributor

Assisted or autonomous

429assisted

3autonomous

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

Feb26

Mar26

Apr26

May26

Jun26

Jul26

Aug26

Sep26

Peak month: 32.9%. Bars are scaled to that peak, not to 100%.

Which agents

Claude Code	Anthropic	239	11.6%
GitHub Copilot	GitHub	148	7.2%
Cursor Agent	Anysphere	68	3.3%
OpenAI Codex	OpenAI	2	0.1%

Verify it yourself

Sample commits that matched. Every one links to GitHub — check the trailers.

740dbc4bfix(subagents): keep the subagent system prompt through context compactionClaude Code
99902b77fix(agents): keep token budget signals for runs without a run_id (#5436)Claude Code
0a0d7681fix(goal): stand the goal down once the run has hit its token budget (#542Claude Code
dfaeef37fix(frontend): support standalone demo APIs and runtime GitHub stars (#530GitHub Copilot
23d8e4b3feat(scripts): support skipping frontend build on make start (#5053)GitHub Copilot
062ba9ddfeat: integrate MiniMax Code as a native ACP agent (#4846)GitHub Copilot
851e7666fix(docker): don't abort Docker startup when .env is missing (#4956)Cursor Agent
ea9b7014fix(clarification): drop sibling tool calls before interrupt (#4908)Cursor Agent
fd41fdb0feat(middleware): add structured tool result meta and tool-progress state Cursor Agent
c542185afeat(extensions): add gateway contribution points and packaged extension mOpenAI Codex
e119dc74feat(codex): support explicit OpenAI Responses API config (#1235)OpenAI Codex

What was excluded

Commits in window	2,162
Merge commits removed	−37
CI / dependency bots removed	−71
Considered	2,054

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 bytedance/deer-flow

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