Per-phase model-class routing hints, parsed from a SKILL.md’s
model_routing frontmatter block (see e.g. liter-llm-bridge’s
SKILL.md). phases maps a phase name to a coarse model-class string
("small", "medium", "large", "frontier", by convention in the
skill pack) — this is preserved data, not yet a resolved model
selection; see crate::llm::router::route_requirements_for_model_class
for the (intentionally approximate, documented-as-provisional)
conversion into a crate::llm::router::RouteRequirements.