Spec for consolidating the three alias tables (benchmark-selector,
auto-model-selection, model-router) into a single SF-extension registry
that reads from @singularity-forge/ai's MODELS and enriches it with
canonical_id, generation, and tier. Shared interface for parallel
Swarm A/B/C work.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
