carlos / platform Public

docs: Fable joins the delegation ladder — outcome-changing work only

Paul's ruling 2026-08-03: use Fable where it's appropriate — the tier
that changes the outcome, not the speed. Converge-grade implementation,
whole-branch reviews, fresh-context deep work. Everything below it stays
exactly as tiered; today's evidence is that Sonnet-with-a-precise-brief
and Opus reviews keep catching what they are meant to catch.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Paul Campbell cc1aefa73ca3248a6fb4f24a3ff15312cdcd4004 parent ddbe55f
1 file changed, +6 −0
  • CLAUDE.md +6 −0
diff --git a/CLAUDE.md b/CLAUDE.md
index b1797c72e..57f6a6c71 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -15,6 +15,12 @@ have Opus review anything that grants authority or touches production paths:
interfaces, established conventions to follow.
- **Opus** — design judgment, multi-file integration, anything security- or
production-touching; and the **reviewer** for work in those areas.
+- **Fable** — where the tier changes the outcome, not the speed (Paul,
+ 2026-08-03): implementation whose correctness rests on several interacting
+ invariants at once (converge-grade, root-side, fleet-wide blast radius),
+ whole-branch final reviews, and deep work that wants a fresh
+ full-capability context window. It burns usage budget fastest — never
+ spend it where a precise Sonnet brief or an Opus review already fits.
Always name the model explicitly when dispatching; an omitted model silently
inherits the session's (usually the most expensive). A precise brief beats a