Adoption is broad. Many contributors are committing agent-authored work, which is what a real organisational rollout looks like.
Assisted or autonomous
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
Peak month: 21.7%. Bars are scaled to that peak, not to 100%.
Which agents
| GitHub Copilot | GitHub | 93 | 8.7% |
| Claude Code | Anthropic | 39 | 3.7% |
| Cursor Agent | Anysphere | 3 | 0.3% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
68b460cbFix duplicate entry and formatting for Yasir ArfatGitHub Copilot618a3485Add Al Marzan to the contributors list (#4132)GitHub Copilotd1a0b15cPotential fix for pull request findingGitHub Copilot06dd3ce2Add site Aahana SuryaClaude Codeae5be2fbExpand Suman Dey portfolio descriptionClaude Code7fc6b522Add Suman Dey portfolioClaude Code916308edAdd site Usman GhiasCursor Agent7700fdb7Add Rohit Singh portfolio sitesCursor Agentb470b532Add site Suhail RoushanCursor Agent
What was excluded
| Commits in window | 1,733 |
| Merge commits removed | −668 |
| CI / dependency bots removed | −0 |
| Considered | 1,065 |
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 emmabostian/developer-portfolios