model-adaptation

The toolkit's home for what changes about your prompts, skills, and scaffolding when the underlying Claude model changes — currently the Claude 5 family (Fable 5 + Mythos 5) succeeding Opus 4.x. It advises and audits; it does not build. skill-writer/skill-review enforce the authoring half, loop-controller the long-run half, and orchestrator the multi-agent half — this skill is where the why and the migration checklist live so those enforcement points stay in sync.

Why this skill exists

Model-adaptation guidance is the kind that rots. It's true only relative to a model generation, it cuts across every skill, and it has no natural owner — so it survives as scattered asides ("Fable 5 reroutes flagged agents", a stray /effort note) that drift out of date the moment a new model ships and nobody remembers to reconcile them. This skill is the single owner. When a new model lands, you update one landscape table here and re-run the migration audit, instead of hunting the toolkit for stale assumptions. Everything model-specific is quarantined in the Current landscape section below; the patterns are written to outlive it.