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DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

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Claude Code v2.1.59 25 Feb 2026

VCS Type Detection

The platform detection module now identifies the version control system in use. It checks for .git (git), .hg (Mercurial), .svn (SVN), .p4config/P4PORT (Perforce), and $tf/.tfvc (TFS). This information is included in environment telemetry.

Evidence

VCS detection map (search for "mercurial", "perforce")

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

See this entry in the whole of v2.1.59 →