34.1%

of 15,045 commits were committed by an AI agent — a floor, not an estimate

34.1% agent · top contributor 8.7%182 contributors

org-wide

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

5,136

agent commits

9,909

human commits

182

agent contributors

8.7%

largest contributor

Assisted or autonomous

4874assisted

262autonomous

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

Jan26

Feb26

Mar26

Apr26

May26

Jun26

Jul26

Aug26

Sep26

Peak month: 65.7%. Bars are scaled to that peak, not to 100%.

Which agents

GitHub Copilot	GitHub	5068	33.7%
Claude Code	Anthropic	68	0.5%
Cursor Agent	Anysphere	7	0%

Verify it yourself

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

2e72cd1ePreserve native errors in logs for debugger source mapping (#336332)GitHub Copilot
b91d3248agentHost: experiment with Copilot skill character budget (#336335)GitHub Copilot
aa513800Make hover mouseout dismissal tests deterministic (#336325)GitHub Copilot
f9550496Fix main process OOM from unconsumed buffered pty host service events (#32Claude Code
1bea02a9sessions: back the checkpoint and fork rows over a chat background (#33498Claude Code
4603a7f7Fix terminal-editor shift-drop firing on detached instances (#318756)Claude Code
2df67b33Fix Modern UI editor tab decoration color on full label (#325291)Cursor Agent
3855b8b8debug: right-align toolbar actions in exception widget (#324471)Cursor Agent
4ac53226fix(terminal): track ligatures addon config for change detection (#318992)Cursor Agent

What was excluded

Commits in window	17,589
Merge commits removed	−2,145
CI / dependency bots removed	−399
Considered	15,045

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 microsoft/vscode

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