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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 v2.1.246

A second kind of periodic check-in alongside goal check-ins

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Useful2 Signal3
Subagents not in their notes

Coordinator worker check-ins are their own check-in type with their own interval setting and reset behaviour.

CLAUDE_CODE_COORDINATOR_WORKER_CHECKIN_SECONDS
What

Coordinator worker check-ins are wired in as their own check-in type next to the existing idle goal check-in, with separate stored state that is cleared on conversation reset and its own interval variable, CLAUDE_CODE_COORDINATOR_WORKER_CHECKIN_SECONDS.

Details
  • The injected message is delivered as a task notification rather than a user turn.
  • The variable sets the interval; what enables the check-in in the first place is not settled by this code path.
Evidence

CLAUDE_CODE_COORDINATOR_WORKER_CHECKIN_SECONDS

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

See this entry in the whole of v2.1.246 →