17.2%

of 1,278 commits were committed by an AI agent — a floor, not an estimate

17.2% agent · top contributor 31.4%69 contributors

org-wide

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

220

agent commits

1,058

human commits

agent contributors

31.4%

largest contributor

Assisted or autonomous

217assisted

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: 50.5%. Bars are scaled to that peak, not to 100%.

Which agents

Claude Code	Anthropic	212	16.6%
Devin	Cognition	9	0.7%
Cursor Agent	Anysphere	4	0.3%
GitHub Copilot	GitHub	4	0.3%

Verify it yourself

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

86b250f3Add a Comparisons section covering 10 agent frameworks (#8260)Claude Code
0c91425fInstall `strict-no-cover` only in the coverage job and authenticate CI's GClaude Code
8c5838ddStop rebuilding unmanaged models in durable capability operations (#7972)Claude Code
d55a2115Add `list_prompts` and `get_prompt` functionality to `McpServer` (#3889)Devin
f0b19471Add anthropic speed, `fast` mode for opus 4.6 (#4300)Devin
3b8246a7bug: Warn about Azure OpenAI completions file-incompatibility (#4048)Devin
86b250f3Add a Comparisons section covering 10 agent frameworks (#8260)Cursor Agent
b6798f7efeat(openrouter): add `CachePoint` and prompt caching support (#4604)Cursor Agent
f0b19471Add anthropic speed, `fast` mode for opus 4.6 (#4300)Cursor Agent
b25c8b3bdocs(models): show how to inspect model capabilities via `model.profile` (GitHub Copilot
4e50e598Reject duplicate deferred tool call IDs (#6241)GitHub Copilot
666bfcba[docs] Add reference for third-party agent skills capabilities in Coding AGitHub Copilot

What was excluded

Commits in window	1,342
Merge commits removed	−2
CI / dependency bots removed	−62
Considered	1,278

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 pydantic/pydantic-ai

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