feat: Introduce a comprehensive set of AI agent skills, agents, and workflows, along with new UI components and application structure.

.agent/skills/database-design/orm-selection.md

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+# ORM Selection (2025)
+
+> Choose ORM based on deployment and DX needs.
+
+## Decision Tree
+
+```
+What's the context?
+│
+├── Edge deployment / Bundle size matters
+│   └── Drizzle (smallest, SQL-like)
+│
+├── Best DX / Schema-first
+│   └── Prisma (migrations, studio)
+│
+├── Maximum control
+│   └── Raw SQL with query builder
+│
+└── Python ecosystem
+    └── SQLAlchemy 2.0 (async support)
+```
+
+## Comparison
+
+| ORM | Best For | Trade-offs |
+|-----|----------|------------|
+| **Drizzle** | Edge, TypeScript | Newer, less examples |
+| **Prisma** | DX, schema management | Heavier, not edge-ready |
+| **Kysely** | Type-safe SQL builder | Manual migrations |
+| **Raw SQL** | Complex queries, control | Manual type safety |