Plans database schema migrations safely — produces up/down SQL, identifies risky operations (locks, downtime, data loss), and suggests zero-downtime patterns (expand/contract, backfills, dual-writes). Use this skill when the user asks to "add a column", "rename a table", "change a constraint", needs
Plans database schema migrations safely — produces up/down SQL, identifies risky operations (locks, downtime, data loss), and suggests zero-downtime patterns (expand/contract, backfills, dual-writes). Use this skill when the user asks to "add a column", "rename a table", "change a constraint", needs a migration script, or asks how to migrate without downtime.