Migrate to Shoehorn

Replace unsafe TypeScript as assertions in test files with type-safe alternatives from @total-typescript/shoehorn.

When to use this skill

• Modernizing test code to eliminate as type assertion anti-patterns
• Making test data creation type-safe with autocomplete support
• Migrating from as unknown as Type double-assertions

When not to use this skill

• Production code (shoehorn is test code only)
• Non-TypeScript projects
• Runtime type validation → use a library like zod

Installation