Fable Orchestration

Enable UltraCode. Maximize useful parallelism: give each independent, verifiable workstream its own appropriately capable subagent.

Model routing

Model	Assign
Fable 5 XI, maximum level	Orchestration planning, the hardest reasoning, difficult debugging, recovery when work is stuck, and final review. For exceptionally hard problems, also assign a Fable subagent at maximum level.
Opus 4.8, extra high	Difficult implementation and adversarial review.
Opus 4.8, high	Ordinary implementation, research, and intermediate review.
Sonnet 5	Only mechanical, extremely obvious work, or execution from a specification detailed enough that error is nearly impossible.