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typescript-discriminated-unions

Apply, review, and explain discriminated unions in TypeScript. Use automatically for tasks involving mutually exclusive variants, invalid state prevention, exhaustiveness checking, variant-specific object properties, application state, function arguments, or React props.

skills/typescript-discriminated-unions/SKILL.md

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# Discriminated Unions

Apply the TypeScript Style Guide's discriminated-union conventions in the context of the current task.

## Workflow

1. Inspect the consuming repository's conventions and configuration.
2. Let explicit repository conventions take precedence over this opinionated guidance.
3. Apply, review, or explain only the guidance relevant to the task.
4. State important tradeoffs when the appropriate model depends on context or judgment.

## Boundaries

- Use discriminated unions for mutually exclusive variants that require different data.