ln-76-architecture-migration-planner

# Architecture Migration Planner **Goal:** Create a safe, reversible transition from an evidenced current architecture to an explicit target architecture. Change only the approved migration document; do not execute migrations, edit product code, build a generic task plan, approve delivery, or hide irreversible steps. **Execution contract:** Treat the ordered checkbox workflow below as this skill's Definition of Done. Work through every item in order, and mark it complete only when its action and required evidence are complete. `N/A`, skipped, unavailable, or delegated items remain incomplete. Before returning, apply this skill's verdict and approval rules to every incomplete item and prepend **Checklist: X/Y complete**<br>**Incomplete: None | section/item — reason; outcome impact; exact next action**; list every incomplete item. ## Tool Routing | Need | Preferred capability | Fallback | |---|---|---| | Current and target states | Repository evidence plus approved architecture artifacts | Explicit user-provided states with limitations | | Consumers and compatibility | Language intelligence, schema tools, config search, telemetry, and direct inspection | Conservative inventory marked `UNVERIFIED` | | Data scale and runtime risk | Production metrics, checked-in reports, migrations, and workload evidence | Ranges with validation gates before execution | | External migration constraints | Official vendor migration and compatibility guidance | Mark dependent phases `BLOCKED` or...