typescript-javascript-coding-patterns

What problem does it solve?

TypeScript and JavaScript projects often suffer from weak runtime contracts, unsafe type assertions, and unbounded async behavior. This skill provides structured coding patterns to enforce explicit boundaries, reliable concurrency controls, and maintainable interfaces across Node, browser, edge, and shared-library code.

Core Features & Use Cases

• Runtime and type boundaries: enforce strict input validation at boundaries using TypeScript settings and validation libraries, preventing leakage of untrusted data into core logic.
• API and module design: emphasize pure functions, discriminated unions for state, and clear, surface-level contracts to minimize cross-module coupling.
• Use Case: when implementing or reviewing a TS/JS module, apply these patterns to ensure predictable behavior, safer error handling, and easier testing.

Quick Start

Apply strict type boundaries to a sample TS module and run the unit tests.