alpha-no-compat.mdc

---
description: Alpha has no installed base; do not treat format breaks as bugs
alwaysApply: true
---

# Alpha: no compatibility

This project is alpha. There is no installed base. Do not preserve, migrate, or dual-read old formats.

Not bugs:
- Changing a persistence, wire, CLVM, or API shape
- Dropping an old save schema, localStorage key, or envelope version
- Requiring a new session after a format change
- Missing a migration, fallback decoder, or "existing users" path

Do not propose compatibility shims, version dual-paths, or "this will break saved games" as a finding.

Still a bug: the **current** encoder and decoder disagree, so a value written now cannot be read now in the same build (refresh, resume, round-trip in this code). Fix that by making today's format consistent, not by keeping an old one.