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.
The hook response system now uses Promise.allSettled to check all pending async hooks concurrently rather than sequentially. Failed hook callbacks are caught and logged individually without blocking other hooks.
Evidence
Hook processing (search for "checkForAsyncHookResponses callback rejected")
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
