Create focused Mermaid ERD diagrams from PostgreSQL databases. Select tables/columns, auto-selects keys, exports .mmd files.

uv sync && uv run python manage.py migrate && bin/runserver
# Open http://localhost:8000, enter postgres://user:pass@host:5432/dbname, select tables, generate diagram

Set preset connections: POSTGRES_CONNECTIONS="name=postgresql://..." uv run python manage.py runserver

bin/runserver loads .env explicitly via uv run --env-file .env.