| name | migration-scripts |
| description | Use when writing or reviewing database/config migration scripts or migration registries. Enforces frozen-snapshot migrations, safe registration, and lean import boundaries. |
| metadata | {"author":"read-frog","version":"1.1.0"} |
Migration Scripts
Rule: Migrations Are Frozen Snapshots
Migration scripts must NEVER import or reference:
- Constants, helpers, or utilities from the main codebase
- Shared types (use
any for migration input/output)
- Factory functions like
createXxx()
Why: The codebase evolves. A migration written today references code that may change tomorrow. When that constant changes, the migration silently breaks — it now migrates to the new shape, not the shape that existed when the migration was written.
Rule: Migration Registries Must Validate the Chain
In this repo, config migration registries should auto-discover migration files from src/utils/config/migration-scripts/v*-to-v*.ts (for example via import.meta.glob), and the registry must:
- Parse both
fromVersion and toVersion from the filename
- Reject invalid steps like
v001-to-v003
- Reject duplicate target versions
- Reject discontinuous chains
Do not silently map only the target version and assume filenames are correct.
Rule: Keep Migration Imports Off Hot Paths
Do not let generic config read helpers or content-script paths import migration registries unless they really perform migration.
Prefer to isolate migration-aware reads/writes into dedicated modules for import/sync/restore flows, so normal runtime paths do not bundle all migration scripts unnecessarily.
Checklist
