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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 v2.1.242

The bridge heartbeats sooner and while partly busy

Under the hood
Useful2 Signal2
Cloud Sessions

The session bridge heartbeats sooner and while busy, so the server is less likely to drop it.

What

The bridge now sends a heartbeat immediately after accepting a session, and keeps heartbeating when sessions are running but it still has spare capacity, so the server is less likely to consider it stale.

Details
  • The one-shot heartbeat reports as bridge_work_heartbeat, or initial_failed on failure.
  • Below full capacity it heartbeats every non_exclusive_heartbeat_interval_ms from the server's bridge config, or every 60000 ms once a first heartbeat has been sent and the server-supplied interval is 0.
  • Previously heartbeats only ran while at the maximum session count.
Evidence

bridge_work_heartbeat

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

See this entry in the whole of v2.1.242 →