Classify the request, inspect the current project state, choose the correct migration path, and validate the Built-in to URP migration outcome carefully. Mandatory Execution Reference For any actual migration or repair pass, read references/implementation-patterns.md before the first call that edits project settings, materials, post-processing, lighting, probes, or scenes. This is mandatory even for short prompts such as "migrate this project to URP" when rollback safety is already confirmed. If that resource cannot be loaded, use the embedded rules in this SKILL.md and lower your confidence:…