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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 v2.1.248 Home All releases olderv2.1.247 v2.1.250newer
Claude Code v2.1.248

Session-end hook timeout parsing simplified

Under the hood
Useful1 Signal1
Hooks

The session-end hook timeout variable is validated more simply; behaviour is the same.

CLAUDE_CODE_SESSIONEND_HOOKS_TIMEOUT_MS
What

CLAUDE_CODE_SESSIONEND_HOOKS_TIMEOUT_MS is now accepted on being greater than zero alone, since the value is already validated as a number earlier. Behaviour is effectively unchanged.

Evidence

CLAUDE_CODE_SESSIONEND_HOOKS_TIMEOUT_MS

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

Related

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

See this entry in the whole of v2.1.248 →