arm-resource-duplicate-property

Id

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

Warn about duplicate properties in resources.

Envelope properties should not be duplicated in the properties model.

Impact

• Area: API, SDK

Reusing an envelope property name inside the RP-specific property bag violates the RPC contract.

LintDiff Equivalent

This rule corresponds to the LintDiff rule ArmResourcePropertiesBag.

❌ 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

@armProviderNamespace
namespace MyService;

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

model FooProperties {
  displayName?: string;
}

Suppression

Suppress only when required to match an existing API; otherwise do not reuse envelope property names in the rp-specific property bag.