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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.

← All of v2.1.251 Home All releases ←olderv2.1.250

Claude Code v2.1.251 28 Aug 2026

Marketplace names that differ only in letter case are now rejected

You'll notice

Useful2 Signal1

Plugins

Two marketplaces whose names differ only in capitalisation now collide loudly instead of silently.

What

Publishing a marketplace configured through settings now clears stale directories that differ only in capitalisation, and fails if the name case-folds onto a marketplace already registered next to it. This avoids two marketplaces colliding on filesystems that ignore case.

Details

Applies to every settings-sourced marketplace publish, with no flag.

Evidence

marketplace name case-folds onto a registered sibling

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

See this entry in the whole of v2.1.251 →