AGENTS

• Validate every change with just fmt and just lint.
• Prefer just test-short for test runs.
• Use the -short flag when testing non-generator code.
• Use full-length tests only when validating long-running generator behavior.
• Package map:
• catalog is the pure metadata index.
• registry is the concrete built-in runtime registry.
• gameentry builds validated runtime entries from definitions plus modes.
• pdfexport owns the printable export pipeline.
• builtinprint only bootstraps built-in print adapters.