Use when writing or reviewing any TypeScript code. Covers discriminated unions, branded types, Zod at boundaries, const arrays over enums, and safe access patterns.
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TypeScript Strict Patterns
Project setup — read [project-setup.md](${CLAUDE_SKILL_DIR}/project-setup.md) when bootstrapping a new project or changing tsconfig / ts-reset / type-fest.
ESLint baseline — read [eslint.config.mjs](${CLAUDE_SKILL_DIR}/eslint.config.mjs) when adding or tweaking lint rules.
Discriminated Unions + Exhaustive Checking
Model variants as discriminated unions — never bags of optional properties:
// GOOD — each variant carries exactly it
[Description truncada. Veja o README completo no GitHub.]
