Model complex state logic using discriminated unions with literal tags.
npx skills add https://github.com/luyi985/lyi-bash --skill tagged-unions
Please help me install this Agent Skill. Skill: tagged-unions Source: https://github.com/luyi985/lyi-bash/tree/main/ai/skills/tagged-unions Command: npx skills add https://github.com/luyi985/lyi-bash --skill tagged-unions
Many codebases accumulate invalid state representations when using plain interfaces with optional properties. Tagging unions provides explicit relationships and safer narrowing to prevent runtime errors.
Create a union type with a literal 'type' field for each variant and switch on 'type' to handle every case.
High-intent search queries and answers about installing and using this skill.
Model complex state logic using discriminated unions by applying a literal tag per variant. This enables compile-time narrowing to guarantee correct data per state and prevents invalid state representations.
The best way to ensure exhaustive handling is to define a union type with a literal 'type' field for each API response variant. Switching on the 'type' tag enforces exhaustive checks across all distinct data states.
Optional properties lead to runtime errors because they accumulate invalid state representations. Discriminated unions provide explicit relationships and safer compile-time narrowing to prevent these runtime issues.
Set up discriminated unions by creating a union type containing a literal tag field for each UI mode. Apply this union to interface properties to ensure exhaustive handling and safe narrowing across variants.
Yes, you can enforce valid state combinations at compile time by using tagged unions. Defining a literal tag per variant allows compile-time narrowing to guarantee that only valid data combinations are accessible.
yandy-rEnforce strict TypeScript patterns with discriminated unions and branded types.
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dandudziCreate conditional, mapped, and template literal types in TypeScript.
jacob-balslevReview TypeScript code for runtime-boundary validation and type-narrowing improvements.
