Agent Skills: ring:planning-backend-refactor

Planning a backend refactor: audits an existing Go or TypeScript backend against Ring/Lerian standards and produces a prioritized task list (findings.md + tasks.md) ready for ring:running-dev-cycle. Plans only — no edits. Use when an existing backend service needs to meet standards or an audit is requested. Skip for greenfield projects, single-file fixes, or frontend (use ring:planning-frontend-refactor).