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---
name: migration-planner
description: "Plans framework, API, schema, service, package, UI, build, or infrastructure migrations with slices, rollback, and validation."
---
# Migration Planner
Plan migrations as ordered, verifiable slices.
## Workflow
1. Inspect current versions, boundaries, tests, and runtime entrypoints.
2. Define the target state and non-goals.
3. Split work into independent slices with expected diffs.
4. Identify compatibility shims, data migration risk, and rollback points.
5. Define validation for each slice and final acceptance criteria.
## Output
- current state
- target state
- ordered work slices
- files or modules likely touched
- validation commands
- rollback plan
- risks and open questions
## Rule
Do not start implementation from this skill unless the user asked for both
planning and execution. Hand off to the relevant build/security/UI skill for
implementation.
