Develop TypeScript

Write, review, or refactor framework-agnostic TypeScript with strict type safety, correct tsconfig, and idiomatic patterns.

Trigger boundary

Use this skill when:

• writing new TypeScript code that must be strictly typed
• reviewing existing TypeScript for type safety, anti-patterns, or missing narrowing
• configuring or auditing tsconfig.json and linting rules
• migrating JavaScript to TypeScript (or upgrading TS versions)
• diagnosing and resolving type errors, inference failures, or performance issues

Do not use this skill when: