{"version":"2.1.280","anchor":"classifier-keepalive-pings-for-remote-coordination-sessions","canonical_anchor":"classifier-keepalive-pings-for-remote-coordination-sessions","heading":"Classifier keepalive pings for remote coordination sessions","tier":"soon","area":"Sessions","scope":null,"heads_up":null,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.280\/e\/classifier-keepalive-pings-for-remote-coordination-sessions","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.280","markdown":"### Classifier keepalive pings for remote coordination sessions\n\nClaude Code adds a keepalive so remote classifier calls don't time out during long coordination checks\n\n**What**\n\nClaude Code has a new keepalive mechanism for the 'api_call' activity classifier, a background process that periodically checks in with a remote service during coordination sessions. While a classifier call to that remote service is still in progress, Claude Code now holds a session-activity hold (called `classifier-check-hold`) open and restarts a deadline timer so the check isn't cut off early. If the hold isn't cleared before the deadline, it logs an event called `session_activity_classifier_hold_expired`.\n\nA new environment variable, `CLAUDE_CODE_AUTO_MODE_CLASSIFIER_OVERLAP`, controls whether more than one classifier call can run at the same time within a lane (a track of concurrent work).\n\n**Why**\n\nThis reduces the chance that a slow remote classifier call gets treated as timed-out or dropped mid-check, and gives a way to see when that still happens via the new hold-expired log event.\n\n- Flag `tengu_ccr_classifier_keepalive_enabled`: Off in both readings (read for one account on one subscription tier against v2.1.280; this account: off, anonymous baseline: off, 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: Sessions\n- Tier: Nothing to try yet\n- Useful: 3\/5\n- Signal: 3\/5\n- Present in the build but not switched on"}