{"name":"tengu_iridescent_gem","slug":"tengu-iridescent-gem","family":"flag","title":"Feature flags","noun":"feature flag","description":"New sampled telemetry records detailed hashes around cache-prefix breaks.","description_source":"entry","described_by":{"version":"2.1.261","anchor":"new-telemetry-prefix-break-diagnostics-with-sampled-hashing"},"presence":{"first_seen":"2.1.261","removed_in":null,"in_current_build":true,"newest_mined":"2.1.322","builds":53,"mined_builds":161,"first_cited":{"version":"2.1.261","released_at":"2026-09-04 17:49:34","spans":1}},"aliases":[],"entries":[{"version":"2.1.261","anchor":"new-telemetry-prefix-break-diagnostics-with-sampled-hashing","heading":"New telemetry: prefix-break diagnostics with sampled hashing","line":"New sampled telemetry records detailed hashes around cache-prefix breaks.","released_at":"2026-09-04 17:49:34","reason":"gate cited by this entry"},{"version":"2.1.261","anchor":"detailed-prompt-cache-break-diagnostics-message0-shapesect","heading":"Detailed prompt-cache-break diagnostics (message0 shape\/section diffing) sampled off by default","line":"Detailed prompt-cache-break diffing telemetry exists but is sampled at zero by default.","released_at":"2026-09-04 17:49:34","reason":"found in this entry's text, named in this entry, gate cited by this entry"}],"entries_total":2,"docs":[],"docs_total":0,"gates":[],"related":[{"name":"tengu_iridescent_boot","slug":"tengu-iridescent-boot","description":"`rm -r` on a path made entirely of `$(...)` or backtick output now always asks, and permission rules cannot auto-allow it"},{"name":"tengu_iridescent_crystal","slug":"tengu-iridescent-crystal","description":"Auto-mode's safety classifier gained a new 'arbiter' mode that can skip some server checks"},{"name":"tengu_iridescent_pascal","slug":"tengu-iridescent-pascal","description":"New gated flag tengu_iridescent_pascal can skip redundant permission-context resets"}],"url":"https:\/\/changelogs.core-directive.com\/reference\/flag\/tengu-iridescent-gem","family_url":"https:\/\/changelogs.core-directive.com\/reference\/flag.json"}