# Phase 73.1 — Visual Schema Diagrams

Open the Schemas navigator, right-click a database, and select **Generate Schema Diagram…**.

The diagram uses cached introspection for tables, views and columns. Foreign-key edges are loaded read-only from `information_schema.KEY_COLUMN_USAGE`. Drag tables to position them, use zoom buttons, search, and toggle views. Layouts persist per connection and database in local preferences.

Run Introspection first if the schema cache is empty. Refresh reloads introspection and relationships. No schema-changing SQL is executed.

Limitations: automatic grid layout rather than graph optimisation; first 10 columns are shown per node; diagram export and multi-diagram management are deferred to Phase 73.2/73.3.

Validation: Swift syntax parsing and ZIP integrity only. Full Xcode build and runtime test are required on macOS.