{"name":"tengu_lucky_cerf","slug":"tengu-lucky-cerf","family":"flag","title":"Feature flags","noun":"feature flag","description":"New guidance nudges Claude to weigh the real cost before spawning a subagent","description_source":"entry","described_by":{"version":"2.1.271","anchor":"new-model-pattern-gated-nudge-encouraging-judicious-subagent"},"presence":{"first_seen":"2.1.271","removed_in":"2.1.307","in_current_build":false,"newest_mined":"2.1.319","builds":33,"mined_builds":159,"first_cited":null},"aliases":[],"entries":[{"version":"2.1.307","anchor":"organization-settings-check-can-recover-from-credential-refr","heading":"Startup retries when your sign-in token is still being refreshed","line":"If organization settings can't load because your sign-in token is mid-refresh, Claude Code retries once and gives a clearer message if it still fails","released_at":"2026-10-21 20:47:18","reason":"gate cited by this entry"},{"version":"2.1.307","anchor":"tengu-lucky-cerf-gate-read-removed-policy-block-now-gets-on","heading":"Runs blocked while a sign-in token refreshes get one retry","line":"When a policy check is blocked because a sign-in token was still refreshing, Claude Code now retries once within a time limit","released_at":"2026-10-21 20:47:18","reason":"gate cited by this entry"},{"version":"2.1.271","anchor":"new-model-pattern-gated-nudge-encouraging-judicious-subagent","heading":"New model-pattern-gated nudge encouraging judicious subagent delegation ('lucky_cerf')","line":"New guidance nudges Claude to weigh the real cost before spawning a subagent","released_at":"2026-09-14 19:45:19","reason":"gate cited by this entry"}],"entries_total":3,"docs":[],"docs_total":0,"gates":[{"version":"2.1.307","state":"unknown","account":null,"baseline":null,"code_default":null},{"version":"2.1.271","state":"unknown","account":null,"baseline":null,"code_default":null}],"related":[{"name":"tengu_lucky_brooks","slug":"tengu-lucky-brooks","description":"When switched on remotely, a first message over 2000 characters is cut to its first 1500 before Claude Code generates a session title from it"},{"name":"tengu_lucky_cerf_text","slug":"tengu-lucky-cerf-text","description":"New guidance nudges Claude to weigh the real cost before spawning a subagent"},{"name":"tengu_lucky_garden","slug":"tengu-lucky-garden","description":"A reworked way of capturing your shell's functions, aliases and options for Bash commands is in the code, off unless switched on remotely"},{"name":"tengu_lucky_nebula","slug":"tengu-lucky-nebula","description":"Behind two switches, Projects writes from a local file get the up-to-date check, and reads saved to a file return a version"},{"name":"tengu_lucky_quill","slug":"tengu-lucky-quill","description":"Two new internal feature gates were added: tengu_groovy_eclipse and tengu_lucky_quill"},{"name":"tengu_lucky_whisper","slug":"tengu-lucky-whisper","description":"Two remote switches, off by default, control keeping a file-sending tool's results in subagents and how unanswered tool requests are found"},{"name":"tengu_lucky_widget","slug":"tengu-lucky-widget","description":"Claude Code can fetch a model-sized copy of large uploaded images and now picks between copies by size, behind a setting that is off by default"}],"url":"https:\/\/changelogs.core-directive.com\/reference\/flag\/tengu-lucky-cerf","family_url":"https:\/\/changelogs.core-directive.com\/reference\/flag.json"}