{"name":"tengu_bg_spare_claim_fail","slug":"tengu-bg-spare-claim-fail","family":"flag","title":"Feature flags","noun":"feature flag","description":"Background session records can be flagged as spare, but nothing in this build decides when a spare gets spawned.","description_source":"entry","described_by":{"version":"2.1.238","anchor":"background-session-records-carry-a-spare-flag"},"presence":{"first_seen":null,"removed_in":null,"in_current_build":false,"newest_mined":"2.1.309","builds":0,"mined_builds":150,"first_cited":{"version":"2.1.238","released_at":"2026-08-20 18:01:54","spans":1}},"aliases":[],"entries":[{"version":"2.1.238","anchor":"background-session-records-carry-a-spare-flag","heading":"Background session records carry a spare flag","line":"Background session records can be flagged as spare, but nothing in this build decides when a spare gets spawned.","released_at":"2026-08-20 18:01:54","reason":"gate cited by this entry, found in this entry's text"}],"entries_total":1,"docs":[],"docs_total":0,"gates":[],"related":[{"name":"tengu_bg_spare_enable","slug":"tengu-bg-spare-enable","description":"Default `true`. Lets the background-session dispatcher keep a warm spare worker process started ahead of time (not on Windows) and hand it to the next dispatched session whose launch mode is not `exec`, provided the spare was started by the same Claude Code version. Turning it off disposes any existing spare and stops spares from being started or claimed."}],"url":"https:\/\/changelogs.core-directive.com\/reference\/flag\/tengu-bg-spare-claim-fail","family_url":"https:\/\/changelogs.core-directive.com\/reference\/flag.json"}