#migrations

2 skills

Skills

Database Migration Safety

Ship schema changes without downtime using expand-contract: backwards-compatible steps, safe locking, and a rollback plan written before running anything.

Use when: Use when writing or reviewing a schema migration, especially renames, type changes, NOT NULL additions, or anything touching a large or hot table.

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Cursor.cursor/rules/*.mdc

SQL Migration Safety Rules

Migration rules requiring reversibility, expand-and-contract for destructive changes, deterministic index naming, and lock awareness.

Use when: Attach to migration directories in any SQL project to prevent irreversible schema changes and table-locking deploys against production data.

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