# #types — MDRSS hashtag feed

> Public MDRSS cards tagged #types.
> Canonical feed: https://mdrss.com/feeds/types

## Cards (5)

### [TypeScript Advanced Types](https://mdrss.com/software-craft/programming-and-runtime/901331/901331.md)

Comprehensive guidance for mastering TypeScript's advanced type system including generics, conditional types, mapped types, template literal types, and utility types for building robust, type-safe applications. Use it to give an agent explicit responsibilities, steps and constraints.

Classification: software-craft/programming-and-runtime · Feed: software-craft · Updated: 2026-08-04T13:54:51.641Z · Version: 1

### [PostgreSQL Table Design](https://mdrss.com/software-craft/api-backend-and-databases/901266/901266.md)

Enable with ALTER TABLE tbl ENABLE ROW LEVEL SECURITY. Create policies: CREATE POLICY user access ON orders FOR SELECT TO app users USING (user id = current user id()). Built-in user-based access control at the row level. Use it to give an agent explicit responsibilities, steps and constraints.

Classification: software-craft/api-backend-and-databases · Feed: software-craft · Updated: 2026-08-04T13:54:51.641Z · Version: 1

### [TypeScript Style Guide](https://mdrss.com/ai-agents/agent-design-and-orchestration/901257/901257.md)

TypeScript-specific conventions and best practices for type-safe development. Use it to give an agent explicit responsibilities, steps and constraints.

Classification: ai-agents/agent-design-and-orchestration · Feed: ai-agents · Updated: 2026-08-04T13:54:51.641Z · Version: 1

### [GraphQL Schema Design Patterns](https://mdrss.com/software-craft/api-backend-and-databases/901200/901200.md)

1. Nullable vs Non-Null : Start nullable, make non-null when guaranteed 2. Input Types : Always use input types for mutations 3. Payload Pattern : Return errors in mutation payloads 4. Pagination : Use cursor-based for infinite scroll, offset for simple cases 5. Nam. Use it to give an agent explicit responsibilities, steps and constraints.

Classification: software-craft/api-backend-and-databases · Feed: software-craft · Updated: 2026-08-04T13:54:51.641Z · Version: 1

### [Python Cheat Sheet: Practical Language Reference](https://mdrss.com/software-craft/programming-and-runtime/901069/901069.md)

Comprehensive Python Cheatsheet ===============================. Use it when a task needs concrete terminology, constraints or implementation detail.

Classification: software-craft/programming-and-runtime · Feed: software-craft · Updated: 2026-08-04T13:54:51.641Z · Version: 1