{"name":"tengu_prompt_cache_break","slug":"tengu-prompt-cache-break","family":"flag","title":"Feature flags","noun":"feature flag","description":"Cache diagnostics know when the baseline came from disk and skip misleading difference reports.","description_source":"entry","described_by":{"version":"2.1.232","anchor":"cache-break-diagnostics-note-when-the-baseline-was-loaded-fr"},"presence":{"first_seen":null,"removed_in":null,"in_current_build":false,"newest_mined":"2.1.309","builds":0,"mined_builds":150,"first_cited":{"version":"2.1.105","released_at":"2026-04-13 19:51:19","spans":1}},"aliases":[],"entries":[{"version":"2.1.275","anchor":"system-prompt-folded-attachment-shape-now-tracked-for-cach","heading":"System-prompt \"folded attachment\" shape now tracked for cache-break diagnosis","line":"Cache-break diagnostics now track the system prompt's folded attachment shape too","released_at":"2026-09-17 20:20:31","reason":"found in this entry's text, named in this entry"},{"version":"2.1.261","anchor":"new-prompt-cache-break-diagnostics-msg0-shape-tracking","heading":"New prompt-cache-break diagnostics: msg0 shape tracking","line":"New internal diagnostics track the first message's shape to diagnose cache breaks.","released_at":"2026-09-04 17:49:34","reason":"gate cited by this entry"},{"version":"2.1.232","anchor":"cache-break-diagnostics-note-when-the-baseline-was-loaded-fr","heading":"Cache-break diagnostics note when the baseline was loaded from disk","line":"Cache diagnostics know when the baseline came from disk and skip misleading difference reports.","released_at":"2026-08-13 21:30:53","reason":"gate cited by this entry, found in this entry's text"},{"version":"2.1.105","anchor":"prompt-cache-break-detection-in-development","heading":"Prompt Cache Break Detection [In Development]","line":null,"released_at":"2026-04-13 19:51:19","reason":"gate cited by this entry, found in this entry's text"}],"entries_total":4,"docs":[],"docs_total":0,"gates":[],"related":[{"name":"tengu_prompt_cache_1h_config","slug":"tengu-prompt-cache-1h-config","description":"Whether a one-hour prompt cache is allowed can now be overridden per agent and can ignore overage."},{"name":"tengu_prompt_cache_diagnosis_received","slug":"tengu-prompt-cache-diagnosis-received","description":"MCP server error lines are escaped before display, plus minor telemetry and version-string cleanups."},{"name":"tengu_prompt_cache_diagnostics","slug":"tengu-prompt-cache-diagnostics","description":"Cache diagnostics know when the baseline came from disk and skip misleading difference reports."}],"url":"https:\/\/changelogs.core-directive.com\/reference\/flag\/tengu-prompt-cache-break","family_url":"https:\/\/changelogs.core-directive.com\/reference\/flag.json"}