{"version":"2.1.288","anchor":"event-loop-stall-detector-can-idle-at-a-slower-interval","canonical_anchor":"event-loop-stall-detector-can-idle-at-a-slower-interval","heading":"Stall detector checks less often while Claude Code is idle","tier":"internal","area":"Elsewhere","scope":"individual","heads_up":false,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.288\/e\/event-loop-stall-detector-can-idle-at-a-slower-interval","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.288","markdown":"### Stall detector checks less often while Claude Code is idle\n\nThe stall detector can now drop to a slower checking rate after a quiet period and speed back up when work resumes\n\n**Unclear.** Which parts of Claude Code besides remote sessions use the slower idle rate is not established.\n\n**What**\n\nClaude Code has a stall detector that checks at regular intervals whether its main processing loop (the part that handles work one piece at a time) has frozen. It used to check at one fixed rate. It can now switch to a slower rate after a quiet period and return to the normal rate as soon as there is work again.\n\n- Remote sessions, where `CLAUDE_CODE_REMOTE` is set, pass in settings for this slower idle rate.\n\n- Telling whether a stall came from the process being paused and resumed is now optional, and logs show `n\/a` when it is off.\n\n- The detector can now be stopped.\n\nThe flag that controls this detector is off unless it is switched on remotely. It read on for this site's account and for the anonymous baseline, having switched on since the previous reading.\n\n**Why**\n\nFewer checks while nothing is happening means fewer timer wake-ups, mostly in remote sessions.\n\n- Flag `tengu_event_loop_stall`: Off by default, switched on for this account (read for one account on one subscription tier against v2.1.288; this account: on, anonymous baseline: on, compiled default: off) These values were read against a different version of Claude Code, so treat them as the nearest reading available instead of one taken on this release.\n- Area: Elsewhere\n- Tier: Under the hood\n- Useful: 1\/5\n- Signal: 1\/5\n- Scope: individual\n- Heads-up: no"}