amiable-dev/alembic-sqlalchemy

Best-practice, token-efficient workflow for Alembic migrations and SQLAlchemy 2.x ORM code. Use this skill whenever a task touches a database schema or its migrations: adding or changing a model, column, index, constraint or enum; running or fixing alembic revision, upgrade, downgrade, autogenerate, heads, merge, stamp or check; env.py, alembic.ini or [tool.alembic] config; data backfills; zero-downtime PostgreSQL changes; SQLite batch mode; SQLAlchemy models (DeclarativeBase, Mapped, mapped_column, relationship), sessions, async engines, connection pooling, or N+1 and lazy-load problems. Trigger even when the user only says "add a field", "update the model", "the migration failed", "two heads", or "why is this query slow" and never names Alembic or SQLAlchemy.