33.4%

of 14,342 commits were committed by an AI agent — a floor, not an estimate

33.4% agent · top contributor 8.8%174 contributors

org-wide

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

4,797

agent commits

9,545

human commits

174

agent contributors

8.8%

largest contributor

Assisted or autonomous

4567assisted

230autonomous

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: 68.5%. Bars are scaled to that peak, not to 100%.

Which agents

GitHub Copilot	GitHub	4732	33%
Claude Code	Anthropic	63	0.4%
Cursor Agent	Anysphere	7	0%

Verify it yourself

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

71bb7d0eImplement new badge design for automations in sidebar (#334091)GitHub Copilot
80c7fc21label: restore generic home template parameters (#334204)GitHub Copilot
8e27ac16agent host: restore channel state after a host restart (#334003)GitHub Copilot
06ac30fdbuild: make agent SDK tarballs a function of version and target (#334113)Claude Code
f15eba2aRevert claude agent SDK lockfile bump from #333870 (#334094)Claude Code
227803b3Adding widthInEm field to injected text options (#332340)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	16,763
Merge commits removed	−2,039
CI / dependency bots removed	−382
Considered	14,342

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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