feat(models): add fable tier for the four singleton judgment gates

Owner-ratified 2026-07-20: architect, grounding-check, tdd-author and debugger pin fable/xhigh — cycle-reach singleton gates whose miss silently ratifies or poisons an entire cycle (drift verdict, autonomous sign-off signature, RED executable-spec, root-cause). The set is closed: extending it requires fresh owner ratification, no fable agent ever runs per-task in a loop or in a parallel fan-out, and workflow scripts stay fable-free (the implement-loop quality gate caps at opus). Policy home: docs/agent-template.md $ model rule 1 (effort: fable gates stay xhigh, not max); the workflow policy headers now point at the exception instead of the former blanket ban.
2026-07-20 14:49:24 +02:00
parent c68b2303a0
commit b591e753cd
7 changed files with 50 additions and 27 deletions
@@ -41,7 +41,8 @@
 //
 // Model policy: every agent() call pins an explicit model — never the
 // session-model inherit (which could route to an unintended tier, e.g. fable —
-// banned for all plugin agents and workflows). Both phases here are mechanical
+// reserved for the four ratified frontmatter gates, never for workflow stages;
+// agent-template § model rule 1). Both phases here are mechanical
 // (compiler-enumerated propagation, build/suite re-run), so both run sonnet.
 // Effort policy mirrors it: every call pins an explicit effort — the edit
 // (real code work) runs high, the build/suite verify (schema-bound check)