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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.

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Claude Code v2.1.237

Poll-events switch cannot be set from settings

Use it now
Useful3 Signal4
Environment Variables Notable

You can set CLAUDE_CODE_POLL_EVENTS in your shell, but settings files can no longer supply it.

CLAUDE_CODE_POLL_EVENTSenv
What

CLAUDE_CODE_POLL_EVENTS is added to the typed environment registry as a boolean and, more usefully, to the list of names filtered out of env blocks supplied by settings files. It can only be set by the process that launches Claude Code, not by a project or user setting.

Evidence

"CLAUDE_CODE_POLL_EVENTS"

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 v2.1.237 →