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arm-resource-duplicate-property

Full name
@azure-tools/typespec-azure-resource-manager/arm-resource-duplicate-property

Warns when a property defined in the resource envelope is also defined in the resource-specific properties bag. Envelope properties should not be duplicated in the properties model.

❌ Incorrect

Section titled “❌ Incorrect”
@armProviderNamespace
namespace MyService;


model FooResource is TrackedResource<FooProperties> {
  ...ResourceNameParameter<FooResource>;
  ...ManagedServiceIdentityProperty;
}


model FooProperties {
  name: string; // duplicate of envelope "name"
  identity: string; // duplicate of envelope "identity"
}

✅ Correct

Section titled “✅ Correct”
@armProviderNamespace
namespace MyService;


model FooResource is TrackedResource<FooProperties> {
  ...ResourceNameParameter<FooResource>;
  ...ManagedServiceIdentityProperty;
}


model FooProperties {
  displayName?: string;
}

Reviewer advice

Section titled “Reviewer advice”

Impacts the API: this corresponds to the LintDiff rule ArmResourcePropertiesBag and causes an RPC violation. Ask the author not to reuse property names from the envelope in the RP-specific property bag. Do not accept a suppression unless it is needed to match existing APIs.