11.3%

of 6,501 commits were committed by an AI agent — a floor, not an estimate

11.3% agent · top contributor 3.8%358 contributors

org-wide

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

733

agent commits

5,768

human commits

358

agent contributors

3.8%

largest contributor

Assisted or autonomous

733assisted

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

Feb26

Mar26

Apr26

May26

Jun26

Jul26

Aug26

Peak month: 17.4%. Bars are scaled to that peak, not to 100%.

Which agents

Claude Code	Anthropic	527	8.1%
Gemini CLI	Google	108	1.7%
Cursor Agent	Anysphere	62	1%
OpenAI Codex	OpenAI	30	0.5%
GitHub Copilot	GitHub	28	0.4%

Verify it yourself

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

615d4cfa[Core] Check for GPU<->CPU syncs during CI (#43107)Claude Code
7b544ecb[Spec Decode][Perf] Fuse the MTP trailing all-reduce; local-argmax draft tClaude Code
925ea7e6[CI][Test] Seed the DeepEP v2 MoE workers, not just the parent (#50589)Claude Code
8fea1d30Fix uniform_random routing simulation to sample without replacement (#4368Gemini CLI
bf2b45b5[Attention] Integrate FlashAttention 4 SM100 headdim 256 support (#42669)Gemini CLI
61141ed2[Hardware][XPU] Register batch-invariant kernels for XPU (#41934)Gemini CLI
1482d2e0[ROCm][DistInf] Enable vLLM DI CI with buildkite/slurm (#47030)Cursor Agent
640a0908Fix DoS via sample-rate forgery bypassing audio decode duration guard (#49Cursor Agent
d21fed95[Bugfix][models_multimodal] Remote HF python code misses importing class (Cursor Agent
50ba4bc6[Feature] Mask Replay (#49577)OpenAI Codex
89c8401c[Model] Skip unused Jina V5 output layers (#52037)OpenAI Codex
f2906b49[Bugfix] Avoid repeated layerwise reload warning scans (#49505)OpenAI Codex
19d61b12[Bugfix] Initialize DeepGemmQuantScaleFMT oracle lazily; bound QuantFP8 UEGitHub Copilot
aeece10c[Bugfix][XPU] Run GDN attention as eager break under breakable cudagraph (GitHub Copilot
405bc867[Perf] Launch the top-k/top-p Triton sampler kernel with 8 warps (#51507)GitHub Copilot

What was excluded

Commits in window	6,504
Merge commits removed	−0
CI / dependency bots removed	−3
Considered	6,501

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 vllm-project/vllm

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