refactor: Скилл для рефакторинга и улучшения кода

--- name: refactor description: This skill should be used when the user asks to refactor code, do a refactor pass, clean up code, extract a class or service, inject a dependency, or make incremental improvements to existing code structure. version: 1.0.0 --- # Refactoring in Glue See [REFACTORING.md](../../../REFACTORING.md) for the full philosophy, checklist, and status of ongoing refactoring efforts. ## Core principle Incremental is good. A small step in the right direction — even if it doesn't finish the job — is valuable. You do not need to complete an entire refactor in one pass. Leave the code measurably better without rewriting everything at once. ## What this means in practice - A partial extraction (e.g., moving 3 methods into a new service) is a valid, shippable change. - A forwarding stub that preserves existing call sites while introducing a seam is a valid, shippable change. - If a full fix requires touching too many things at once, find the smallest safe slice and do that. - Zero behavior change is the goal for each individual refactoring step. New behavior comes after.