microsoft/TypeScript 31,781 commits · Jul 2014 – Oct 2026 · one ring per month rings 20262023202020182016 Copilot co-author trailers peaked at 8% of commits in Sep2026.AI agent accounts authored 40% of commits in May 2026.One account, TypeScript Bot, authored 28% of commits in Feb AI co-author / assisted-by trailerAI agent accountbot-named accountno AI signal (not "human-written")Disclosure is not usage.
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Colours show what the commit history discloses: an AI co-author or Assisted-by trailer, an AI agent's own account, or a bot-named account. Uncoloured wood means no signal, not "written by a human". Disclosure is not usage: tool settings, squash merges and agents committing under their own accounts add or remove these signals. Non-merge commits on the default branch, grouped by author date (UTC).