AGENTS.md

Postgres

• Through the dbhub MCP server run only reading statements (SELECT, EXPLAIN, catalog queries) unless the user asked for a specific write. Before any statement that changes data or schema, show it, name the database it will run on, and wait for a yes.
• Never run EXPLAIN ANALYZE on a statement that writes, and ask before running it on a database that may be production: it executes the query.
• Find out which database you are connected to before drawing conclusions: plans and row counts from a small development database do not predict production.
• Look at the real schema (tables, indexes, constraints, row estimates) before writing or judging a query; do not assume it from the application's models.
• Limit exploratory queries and select only the columns needed. Keep personal data out of the conversation: prefer counts and shapes to rows, and never copy row contents into code, commits or issues.
• Schema changes go through the project's migration tool as migration files, never as statements run by hand.
• Never print the connection string or its password.