Source Intelligence

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 v2.1.227 Home All releases olderv2.1.226 v2.1.228newer
Claude Code v2.1.227

Failed heartbeat drops back off the idle interval

Under the hood
Useful1 Signal1
Internals

After a failed heartbeat, Claude Code goes back to checking in more often.

What

When the CLI heartbeat has been told by the server it can beat less often and a beat then fails with anything other than a 429, the longer idle interval is given up and the shorter starting interval takes effect immediately.

Details
  • Reported as a warning event named cli_heartbeat_idle_reverted_on_failure.
  • A failed liveness-probe beat is now counted separately from a normal failed beat.
Evidence

cli_heartbeat_idle_reverted_on_failure

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

See this entry in the whole of v2.1.227 →