{"name":"tengu_coral_whistle","slug":"tengu-coral-whistle","family":"flag","title":"Feature flags","noun":"feature flag","description":null,"description_source":"none","described_by":null,"presence":{"first_seen":null,"removed_in":null,"in_current_build":false,"newest_mined":"2.1.309","builds":0,"mined_builds":150,"first_cited":{"version":"2.1.51","released_at":"2026-02-23 23:44:09","spans":1}},"aliases":[],"entries":[{"version":"2.1.61","anchor":"built-in-tools-no-longer-deferred-by-default","heading":"Built-in tools no longer deferred by default","line":null,"released_at":"2026-02-26 21:40:54","reason":"gate cited by this entry, found in this entry's text"},{"version":"2.1.51","anchor":"smart-tool-deferral-gradual-rollout","heading":"Smart Tool Deferral [Gradual Rollout]","line":null,"released_at":"2026-02-23 23:44:09","reason":"gate cited by this entry, found in this entry's text"}],"entries_total":2,"docs":[],"docs_total":0,"gates":[],"related":[{"name":"tengu_coral_anchor","slug":"tengu-coral-anchor","description":"A remote task stuck waiting on input now fails as blocked and tells you where to answer it."},{"name":"tengu_coral_beacon","slug":"tengu-coral-beacon","description":"Default `false`. When on, the rate-limit options menu adds an option `Upgrade to Team plan` (labelled `Switch to Team plan` on Max 20x) for users not on a Team or Enterprise plan, if the upgrade action is enabled. It also lets the rate-limit upsell menu be offered to such users when the upgrade command is available (not disabled by `DISABLE_UPGRADE_COMMAND` and not an Enterprise plan), in cases where the plan's upgrade paths would otherwise not qualify."},{"name":"tengu_coral_fern","slug":"tengu-coral-fern","description":"Default `false`. When on, the auto memory prompt gets a `## Searching past context` section telling the model to search the memory directory's `*.md` topic files first and session transcript `*.jsonl` logs as a last resort, with an example `grep -rn` command or Grep tool call for each, and to use narrow search terms."}],"url":"https:\/\/changelogs.core-directive.com\/reference\/flag\/tengu-coral-whistle","family_url":"https:\/\/changelogs.core-directive.com\/reference\/flag.json"}