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.
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.