Fable 5.1 orchestrates GPT-5.6 Luna agents.
Via the 'fable-advisor' plugin for Claude Code.
1. Fable 5.1 orchestrates
2. GPT-5.6 Luna implements
3. Fable 5.1 reviews
Think of it like in-context distillation: give Luna the intelligence of Fable 5.1 at a fraction the cost.