Source Intelligence

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 v2.1.70 Home All releases olderv2.1.69 v2.1.71newer
Claude Code v2.1.70

MIME Type Database Removed (Bundle Size Reduction)

The full IANA MIME type database (~4000+ entries) has been replaced with stubs that throw descriptive errors, significantly reducing bundle size. The stubs warn against relying on axios auto-multipart serialization.

Evidence

Stub implementation (search for "mime-types." and "is stubbed in this build")

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

See this entry in the whole of v2.1.70 →