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 v2.1.53 Home All releases olderv2.1.52 v2.1.54newer
Claude Code v2.1.53

MCP Client State Update Batching

MCP client state updates are now batched using a 16ms debounce timer, reducing React re-renders when multiple MCP servers report status changes in quick succession.

Evidence

Batching with 16ms setTimeout in MCP client update callback

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

See this entry in the whole of v2.1.53 →