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.
Added performance logging that warns when PreToolUse hooks, PostToolUse hooks, or permission decisions take an unusually long time. This helps diagnose slow hook configurations that degrade responsiveness.
Evidence
Performance diagnostics for hooks (search for "Slow PreToolUse hooks:", "Slow PostToolUse hooks:", and "Slow permission decision:")
Strings lifted out of the shipped bundle, so the claim above can be checked against them.