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+
+# PostgreSQL
+
+primary database. the one database you need for almost everything.
+
+**installed via:** `brew install postgresql@16`
+
+**extensions:** pgvector installed (`brew install pgvector`) for vector similarity search — used with AI/embedding workflows.
+
+**in the stack:** locally for development, remotely on [[AWS Lightsail]] for production. also use Supabase (via [[MCP]]) as a managed Postgres option for some projects.
+
+**why Postgres:** rock-solid, SQL-native, extensible (pgvector, PostGIS, etc.), and the ecosystem tooling is unmatched.
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