{"name":"tengu_fizzy_wren","slug":"tengu-fizzy-wren","family":"flag","title":"Feature flags","noun":"feature flag","description":"The switch behind an unidentified feature was replaced by a new one that stays off unless Anthropic's servers turn it on","description_source":"entry","described_by":{"version":"2.1.323","anchor":"gate-rename-tengu-woolly-leaf-to-tengu-fizzy-wren"},"presence":{"first_seen":null,"removed_in":null,"in_current_build":false,"newest_mined":"2.1.323","builds":0,"mined_builds":162,"first_cited":{"version":"2.1.323","released_at":"2026-11-12 20:29:28","spans":1}},"aliases":[],"entries":[{"version":"2.1.323","anchor":"gate-rename-tengu-woolly-leaf-to-tengu-fizzy-wren","heading":"An unidentified feature moves to a new switch that is off by default","line":"The switch behind an unidentified feature was replaced by a new one that stays off unless Anthropic's servers turn it on","released_at":"2026-11-12 20:29:28","reason":"gate cited by this entry, found in this entry's text"},{"version":"2.1.323","anchor":"experiment-gate-list-changed","heading":"The set of server-controlled experiments has changed","line":"Claude Code dropped four server-controlled experiment switches and added many others, nearly all off unless switched on remotely","released_at":"2026-11-12 20:29:28","reason":"gate cited by this entry"}],"entries_total":2,"docs":[],"docs_total":0,"gates":[{"version":"2.1.323","state":"unknown","account":null,"baseline":true,"code_default":false}],"related":[{"name":"tengu_fizzy_bonbon","slug":"tengu-fizzy-bonbon","description":"A new gate affects how fast-mode tool permissions are resolved"},{"name":"tengu_fizzy_grove","slug":"tengu-fizzy-grove","description":"A gate decides which of two error codes an interrupt-triggered abort reports."},{"name":"tengu_fizzy_minsky","slug":"tengu-fizzy-minsky","description":"In the desktop app and on claude.ai, a browser request with no extension connected can get a fixed setup reply instead of a model answer"},{"name":"tengu_fizzy_petal","slug":"tengu-fizzy-petal","description":null},{"name":"tengu_fizzy_treasure","slug":"tengu-fizzy-treasure","description":"Two new switches set by Anthropic's servers are built in, one falling back to off and one to on"}],"url":"https:\/\/changelogs.core-directive.com\/reference\/flag\/tengu-fizzy-wren","family_url":"https:\/\/changelogs.core-directive.com\/reference\/flag.json"}