{"name":"tengu_russet_plover","slug":"tengu-russet-plover","family":"flag","title":"Feature flags","noun":"feature flag","description":"Artifact syntax highlighting and mermaid diagrams are now always on; three other gates were renamed and stay off.","description_source":"entry","described_by":{"version":"2.1.239","anchor":"three-feature-gates-renamed-three-retired"},"presence":{"first_seen":"2.1.239","removed_in":"2.1.251","in_current_build":false,"newest_mined":"2.1.309","builds":10,"mined_builds":150,"first_cited":{"version":"2.1.239","released_at":"2026-08-21 17:18:54","spans":1}},"aliases":[],"entries":[{"version":"2.1.240","anchor":"saving-a-default-effort-level-can-now-scope-it-to-one-model","heading":"Saving a default effort level can now scope it to one model","line":"Your saved default effort could apply per model instead of everywhere, but that is off.","released_at":"2026-08-22 13:03:23","reason":"gate cited by this entry, found in this entry's text"},{"version":"2.1.239","anchor":"three-feature-gates-renamed-three-retired","heading":"Three feature gates renamed, three retired","line":"Artifact syntax highlighting and mermaid diagrams are now always on; three other gates were renamed and stay off.","released_at":"2026-08-21 17:18:54","reason":"gate cited by this entry, found in this entry's text"},{"version":"2.1.239","anchor":"per-model-effort-level-in-settings-behind-a-gate","heading":"Per-model effort level in settings, behind a gate","line":"You could set an effort level per model in settings, but the lookup is gated off.","released_at":"2026-08-21 17:18:54","reason":"gate cited by this entry, found in this entry's text"}],"entries_total":3,"docs":[],"docs_total":0,"gates":[{"version":"2.1.240","state":"off","account":false,"baseline":false,"code_default":false},{"version":"2.1.239","state":"off","account":false,"baseline":false,"code_default":false}],"related":[{"name":"tengu_russet_linnet","slug":"tengu-russet-linnet","description":"Default `false`. When on, the `Skill` tool's prompt uses the shorter `Invoke a skill.` text in place of the default `Execute a skill within the main conversation` text. Setting `CLAUDE_CODE_SKILL_DESC_REFRAME` to true turns this on regardless of the flag."},{"name":"tengu_russet_pergola","slug":"tengu-russet-pergola","description":"A productivity-skills switch is named in the artifact code but nothing reads it."},{"name":"tengu_russet_whimbrel","slug":"tengu-russet-whimbrel","description":null}],"url":"https:\/\/changelogs.core-directive.com\/reference\/flag\/tengu-russet-plover","family_url":"https:\/\/changelogs.core-directive.com\/reference\/flag.json"}