typescript-advanced-types

Master TypeScript's advanced type system including generics, conditional types, mapped types, template literals, and utility types for building type-safe applications. Use when implementing complex type logic, creating reusable type utilities, or ensuring compile-time type safety in TypeScript projects.

1.02x

Quality

53%

Does it follow best practices?

Impact

82%

1.02x

Average score across 3 eval scenarios

Securityby

Passed

No known issues

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Evaluation results

92%

-8%

Async Payment Operation Result Module

Discriminated unions and type guards

Criteria

Without context

With context

Discriminant property

100%

At least 3 union variants

100%

interface for shapes

100%

type for union alias

100%

Generic success type

100%

Type guard predicate syntax

100%

No type assertions for narrowing

100%

No `any` type

100%

Exhaustive switch/if on discriminant

100%

Null/undefined handling

100%

Exported types

100%

TypeScript file produced

100%

82%

14%

Type Utility Toolkit for Large-Scale TypeScript Migration

Infer keyword and mapped type key remapping

Criteria

Without context

With context

Uses `infer` keyword

100%

Mapped type key remapping

100%

Generic constraints used

100%

`never` for key filtering

50%

100%

No `any` in utility types

100%

JSDoc on complex types

100%

Recursive/nested type

100%

Built-in utility usage

100%

Modifier removal

`interface` for shapes

100%

`keyof` and `in` operators

100%

72%

Type-Safe Plugin Event Bus

Template literal types and type testing

Criteria

Without context

With context

Template literal type

100%

String intrinsic used

AssertEqual type test helper

100%

Type tests verify relationships

100%

Const assertion used

`interface` for event payloads

`type` for event name unions

100%

Mapped type over event map keys

100%

No `any` in type system

100%

Template literal union distribution

100%

TypeScript file produced

100%

Repository: wshobson/agents
Commit: 91fe43e

Evaluated: 27 days ago
Agent: Claude Code
Model: Claude Sonnet 4.6

Table of Contents

Async Payment Operation Result Module Type Utility Toolkit for Large-Scale TypeScript Migration Type-Safe Plugin Event Bus

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