38.2%

of 4,251 commits were committed by an AI agent — a floor, not an estimate

38.2% agent · top contributor 9.8%187 contributors

org-wide

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

1,623

agent commits

2,628

human commits

187

agent contributors

9.8%

largest contributor

Assisted or autonomous

1623assisted

0autonomous

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: 83.3%. Bars are scaled to that peak, not to 100%.

Which agents

Claude Code	Anthropic	1536	36.1%
GitHub Copilot	GitHub	62	1.5%
Cursor Agent	Anysphere	27	0.6%
OpenAI Codex	OpenAI	1	0%

Verify it yourself

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

c0dbe306test(embeddeddolt): let the dep-rekey marker sit below the ignored-series Claude Code
f56632adperf(storage): stop burning two wasted MySQL sessions per bd invocation (wClaude Code
e21eaf00refactor(import): retire the same-chunk regular<->wisp deferral (wy-y52sycClaude Code
9ca6b51bci(nix): auto-update default.nix vendorHash on dependabot Go bumps (#3804)GitHub Copilot
6ec4a0d6chore: untrack workflow formulasGitHub Copilot
202a4d07chore: track workflow formulas for portabilityGitHub Copilot
c990ff2bfix(prime): never split UTF-8 when truncating compact memories (#5338)Cursor Agent
9827c663fix(github): content-based dedup on push to stop re-PATCHing every issue (Cursor Agent
f4d496fefix(worktree): repair permissive .beads/ after worktree create (GH#3593) (Cursor Agent
1696e2f7Make init prompts cancelableOpenAI Codex

What was excluded

Commits in window	5,165
Merge commits removed	−796
CI / dependency bots removed	−118
Considered	4,251

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 gastownhall/beads

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