{
  "context": "Agent must produce all three canonical test double types (Stub, Mock, Fake) that correctly implement the given repository interface",
  "type": "weighted_checklist",
  "checklist": [
    {
      "name": "All three classes implement IProductRepository",
      "description": "StubProductRepository, MockProductRepository, and InMemoryProductRepository each have 'implements IProductRepository' in their class declaration",
      "max_score": 15
    },
    {
      "name": "Stub returns fixed data",
      "description": "StubProductRepository.findById returns a hardcoded Product object (not null, not dynamic) regardless of the id argument",
      "max_score": 15
    },
    {
      "name": "Mock records save call",
      "description": "MockProductRepository has a property (savedProduct or equivalent) that is set to the product argument when save is called, and starts as null",
      "max_score": 20
    },
    {
      "name": "Fake uses a Map for storage",
      "description": "InMemoryProductRepository stores products in a Map<string, Product> and all three methods (findById, save, findAll) operate against that map",
      "max_score": 20
    },
    {
      "name": "Fake findAll returns all stored products",
      "description": "InMemoryProductRepository.findAll returns Array.from of the map's values (or equivalent), not a hardcoded array",
      "max_score": 15
    },
    {
      "name": "Types are correct",
      "description": "findById return types are Promise<Product | null>, save returns Promise<void>, and findAll returns Promise<Product[]> across all three implementations",
      "max_score": 15
    }
  ]
}