# US04-01 — Build and Export Rename Plans

Epic: [E04](../E04-guarded-renaming.md)

As a user, I want a complete validated rename plan before mutation so I can understand
every source, destination, collision, and blocker.

## Acceptance criteria

- Approved album proposals produce itemized plans with asset IDs, source/destination,
  expected hashes, versions, and required operations.
- Validation detects missing/changed sources, duplicate targets, case-only and Unicode
  collisions, root escapes, symlinks, and cross-filesystem behavior.
- A portable JSON export contains no credentials and has a schema version/checksum.

## Automated tests

- Property tests validate collision-free plans and asset-set preservation.
- API/golden tests cover valid, invalid, stale, case-only, Unicode, and exported plans.

## Dependencies

- E03 complete