ts-pattern Refactor

Convert error-prone conditional code to match().with().exhaustive() — without over-applying it.

When to Use

• Sweeping a TS/React codebase for ts-pattern opportunities
• A discriminated union ({ kind: ... }, status: 'a' | 'b' | ...) has grown new variants and the UI dispatch is scattered
• Reviewing JSX with nested ternaries or && fragment chains keyed off the same discriminator

Judgment Criteria

The number of branches alone is not the trigger. Look at syntactic form × context.