<tool_restrictions> EnterPlanMode and ExitPlanMode are banned. This skill is Arc's own structured process. </tool_restrictions>

<arc_runtime> Requires the full Arc bundle. Arc-owned paths (agents/, references/, disciplines/, templates/, scripts/, rules/, skills/) resolve from the plugin root — the directory containing agents/ and skills/. Everything else is the user's repository. </arc_runtime>

<required_reading> Before starting, read these references:

references/architecture-patterns.md — import depth rules, boundary violations
references/maintainability-review.md — strict god-file, duplication, and structural simplification bar
references/complexity-optimization.md — safe optimization patterns and behavior-preservation checks

Also read, when present in the target project:

refactor