{"name":"tengu_quartz_heron","slug":"tengu-quartz-heron","family":"flag","title":"Feature flags","noun":"feature flag","description":"Default `false`. Picks the model for the built-in `Explore` agent: when false it uses `haiku`; when true it uses `inherit` (the parent's model), except on the first-party API when the parent model name contains none of `haiku`, `sonnet` or `opus`, where it uses `opus`.","description_source":"code","described_by":{"bundle":"2.1.197","author":"claude-opus-5-5"},"presence":{"first_seen":"2.1.152","removed_in":"2.1.198","in_current_build":false,"newest_mined":"2.1.309","builds":37,"mined_builds":150,"first_cited":null},"aliases":[],"entries":[],"entries_total":0,"docs":[],"docs_total":0,"gates":[],"related":[{"name":"tengu_quartz_falcon","slug":"tengu-quartz-falcon","description":null},{"name":"tengu_quartz_pipit","slug":"tengu-quartz-pipit","description":"Default `true`. When a main-thread turn under an active `\/goal` ends in a way Claude Code classifies as unrecoverable (a context limit such as `prompt_too_long` or `blocking_limit`), the goal is cleared, its Stop hook removed, and the warning `Goal cleared after an unrecoverable error (...)` is shown. When `false`, that case returns without clearing the goal."},{"name":"tengu_quartz_thimble","slug":"tengu-quartz-thimble","description":"Plugin eval now writes report.html and publishes it to claude.ai unless you pass --no-publish."}],"url":"https:\/\/changelogs.core-directive.com\/reference\/flag\/tengu-quartz-heron","family_url":"https:\/\/changelogs.core-directive.com\/reference\/flag.json"}