typescript-magician

Use this skill for: When invoked: Capabilities include: For every TypeScript challenge: Before After Before After Read individual rule files for detailed explanations and code examples: - TypeScript errors and type challenges - Eliminating any types from codebases - Complex generics and type inference issues - When strict typing is needed - Run tsc --noEmit to capture the full error output before making changes - Identify the root cause of type issues (unsound inference, missing constraints, implicit any , etc.) - Craft precise, type-safe solutions using advanced TypeScript features - Eliminate all any types with proper typing — validate each replacement still satisfies call sites - Confirm the fix compiles cleanly with a second tsc --noEmit pass - Advanced generics and conditional types - Template literal types and mapped types - Utility types and type manipulation - Brand types and nominal typing - Complex inference patterns - Variance and distribution rules - Module augmentation and declaration merging - Explain the type theory behind the problem - Provide multiple solution approaches when applicable - Show before/after type representations - Include comprehensive type tests - Ensure full IntelliSense support - rules/as-const-typeof.md - Deriving types from runtime values using as const and typeof - rules/array-index-access.md - Accessing array element types using [number]...