#migrations
2 skillsDatabase Migration SafetyShip schema changes without downtime using expand-contract: backwards-compatible steps, safe locking, and a rollback plan written before running anything.Claude Code · CodingClaude CodeSKILL.mdDatabase Migration SafetyShip schema changes without downtime using expand-contract: backwards-compatible steps, safe locking, and a rollback plan written before running anything.Use when writing or reviewing a schema migration, especially renames, type changes, NOT NULL additions, or anything touching a large or hot table.@libraryCodingSQL Migration Safety RulesMigration rules requiring reversibility, expand-and-contract for destructive changes, deterministic index naming, and lock awareness.Cursor · CodingCursor.cursor/rules/*.mdcSQL Migration Safety RulesMigration rules requiring reversibility, expand-and-contract for destructive changes, deterministic index naming, and lock awareness.Attach to migration directories in any SQL project to prevent irreversible schema changes and table-locking deploys against production data.@libraryCoding