Individual skill

migration-planner

Plans a safe, incremental migration (framework, database, service, or platform) with rollback points and a dual-running strategy. Use when replacing something that's already in production and can't just be swapped in one step.

skills/architecture/migration-planner/SKILL.md

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## Purpose

Plan a migration from an existing system to a new one in incremental, individually-reversible steps — so the migration can be paused, verified, or rolled back at any point, rather than being a single high-risk cutover.

## When to Use

- Migrating a framework, database, service, or platform that's already running in production.
- Replacing a component where a big-bang cutover would be too risky to attempt.
- The user asks how to "migrate," "move off," or "replace" something existing.

Differs from [Project Planner](../project-planner/): that plans building something new; this plans *replacing* something that already exists and must keep working throughout.

## What to Analyze / Do