diff --git a/packages/typespec-lintdiff/src/rules/xms-resource-in-put-response.ts b/packages/typespec-lintdiff/src/rules/xms-resource-in-put-response.ts
index b0c3b5f9b4..787cc4681f 100644
--- a/packages/typespec-lintdiff/src/rules/xms-resource-in-put-response.ts
+++ b/packages/typespec-lintdiff/src/rules/xms-resource-in-put-response.ts
@@ -1,7 +1,6 @@
 import {
-  getResourceOperation,
-  isAzureResource,
-  resolveProviderNamespace,
+  getArmProviderNamespace,
+  getArmResource,
 } from "@azure-tools/typespec-azure-resource-manager";
 import { createRule, type Model, type ModelProperty } from "@typespec/compiler";
 import { getHttpOperation, type HttpOperationResponse } from "@typespec/http";
@@ -20,7 +19,10 @@ export const xmsResourceInPutResponseRule = createRule({
     return {
       operation: (operation) => {
         const namespace = operation.interface?.namespace ?? operation.namespace;
-        if (resolveProviderNamespace(context.program, namespace) === undefined) {
+        if (
+          namespace === undefined ||
+          getArmProviderNamespace(context.program, namespace) === undefined
+        ) {
           return;
         }
 
@@ -29,10 +31,6 @@ export const xmsResourceInPutResponseRule = createRule({
           return;
         }
 
-        if (getResourceOperation(context.program, operation) !== undefined) {
-          return;
-        }
-
         const responseModel = getPrimarySuccessResponseModel(httpOperation.responses);
         if (responseModel === undefined) {
           return;
@@ -43,7 +41,7 @@ export const xmsResourceInPutResponseRule = createRule({
         }
 
         if (
-          isAzureResource(context.program, responseModel) ||
+          getArmResource(context.program, responseModel) !== undefined ||
           hasExplicitAzureResourceExtension(context.program, responseModel)
         ) {
           return;
diff --git a/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/global-put-ignored/expect.json b/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/global-put-ignored/expect.json
new file mode 100644
index 0000000000..1454d2dfb6
--- /dev/null
+++ b/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/global-put-ignored/expect.json
@@ -0,0 +1,29 @@
+{
+  "violation": false,
+  "ambientDiagnostics": [
+    {
+      "code": "@azure-tools/typespec-azure-core/documentation-required",
+      "count": 1
+    },
+    {
+      "code": "@azure-tools/typespec-azure-resource-manager/arm-resource-operation",
+      "count": 2
+    },
+    {
+      "code": "tsp-lintdiff-local-linter/latest-version-of-common-types-must-be-used",
+      "count": 1
+    },
+    {
+      "code": "tsp-lintdiff-local-linter/path-parameter-schema",
+      "count": 1
+    },
+    {
+      "code": "tsp-lintdiff-local-linter/put-in-operation-name",
+      "count": 1
+    },
+    {
+      "code": "tsp-lintdiff-local-linter/xms-examples-required",
+      "count": 1
+    }
+  ]
+}
diff --git a/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/global-put-ignored/main.tsp b/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/global-put-ignored/main.tsp
new file mode 100644
index 0000000000..55b4cce638
--- /dev/null
+++ b/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/global-put-ignored/main.tsp
@@ -0,0 +1,33 @@
+import "../../lib/imports.tsp";
+
+using TypeSpec.Http;
+using TypeSpec.Rest;
+using TypeSpec.Versioning;
+using Azure.ResourceManager;
+
+@armProviderNamespace
+@service(#{ title: "Test Service" })
+@versioned(Versions)
+namespace Microsoft.TestService {
+  enum Versions {
+    @useDependency(Azure.ResourceManager.CommonTypes.Versions.v5)
+    @armCommonTypesVersion(Azure.ResourceManager.CommonTypes.Versions.v3)
+    v2024_01_01: "2024-01-01",
+  }
+
+  interface Operations extends Azure.ResourceManager.Operations {}
+}
+
+/** A global result that resembles a resource. */
+model GlobalResult {
+  /** The resource name. */
+  name?: string;
+
+  /** The resource type. */
+  type?: string;
+}
+
+/** A global PUT outside the ARM provider namespace. */
+@route("/global/{name}")
+@put
+op globalPut(@path name: string): GlobalResult;
diff --git a/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/global-put-ignored/output.json b/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/global-put-ignored/output.json
new file mode 100644
index 0000000000..912e241d2f
--- /dev/null
+++ b/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/global-put-ignored/output.json
@@ -0,0 +1,80 @@
+{
+  "swagger": "2.0",
+  "info": {
+    "title": "Test Service",
+    "version": "2024-01-01",
+    "x-typespec-generated": [
+      {
+        "emitter": "@azure-tools/typespec-autorest"
+      }
+    ]
+  },
+  "schemes": [
+    "https"
+  ],
+  "host": "management.azure.com",
+  "produces": [
+    "application/json"
+  ],
+  "consumes": [
+    "application/json"
+  ],
+  "security": [
+    {
+      "azure_auth": [
+        "user_impersonation"
+      ]
+    }
+  ],
+  "securityDefinitions": {
+    "azure_auth": {
+      "type": "oauth2",
+      "description": "Azure Active Directory OAuth2 Flow.",
+      "flow": "implicit",
+      "authorizationUrl": "https://login.microsoftonline.com/common/oauth2/authorize",
+      "scopes": {
+        "user_impersonation": "impersonate your user account"
+      }
+    }
+  },
+  "tags": [
+    {
+      "name": "Operations"
+    }
+  ],
+  "paths": {
+    "/providers/Microsoft.TestService/operations": {
+      "get": {
+        "operationId": "Operations_List",
+        "tags": [
+          "Operations"
+        ],
+        "description": "List the operations for the provider",
+        "parameters": [
+          {
+            "$ref": "../../../../../common-types/resource-management/v3/types.json#/parameters/ApiVersionParameter"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "Azure operation completed successfully.",
+            "schema": {
+              "$ref": "../../../../../common-types/resource-management/v3/types.json#/definitions/OperationListResult"
+            }
+          },
+          "default": {
+            "description": "An unexpected error response.",
+            "schema": {
+              "$ref": "../../../../../common-types/resource-management/v3/types.json#/definitions/ErrorResponse"
+            }
+          }
+        },
+        "x-ms-pageable": {
+          "nextLinkName": "nextLink"
+        }
+      }
+    }
+  },
+  "definitions": {},
+  "parameters": {}
+}
diff --git a/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/global-put-ignored/tsp-diagnostics.json b/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/global-put-ignored/tsp-diagnostics.json
new file mode 100644
index 0000000000..bc1c65ff1d
--- /dev/null
+++ b/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/global-put-ignored/tsp-diagnostics.json
@@ -0,0 +1,37 @@
+[
+  {
+    "code": "tsp-lintdiff-local-linter/latest-version-of-common-types-must-be-used",
+    "severity": "warning",
+    "message": "Use the latest ARM common-types version 'v6' instead of 'v3'."
+  },
+  {
+    "code": "@azure-tools/typespec-azure-core/documentation-required",
+    "severity": "warning",
+    "message": "The ModelProperty named 'name' should have a documentation or description, use doc comment /** */ to provide it."
+  },
+  {
+    "code": "@azure-tools/typespec-azure-resource-manager/arm-resource-operation",
+    "severity": "warning",
+    "message": "All operations must be inside an interface declaration."
+  },
+  {
+    "code": "@azure-tools/typespec-azure-resource-manager/arm-resource-operation",
+    "severity": "warning",
+    "message": "All Resource operations must use an api-version parameter. Please include Azure.ResourceManager.ApiVersionParameter in the operation parameter list using the spread (...ApiVersionParameter) operator, or using one of the common resource parameter models."
+  },
+  {
+    "code": "tsp-lintdiff-local-linter/put-in-operation-name",
+    "severity": "warning",
+    "message": "'PUT' operation 'globalPut' should use method name 'create'. Note: If you have already shipped an SDK on top of this spec, fixing this warning may introduce a breaking change."
+  },
+  {
+    "code": "tsp-lintdiff-local-linter/path-parameter-schema",
+    "severity": "warning",
+    "message": "Path parameter should specify a maximum length (maxLength) and characters allowed (pattern)."
+  },
+  {
+    "code": "tsp-lintdiff-local-linter/xms-examples-required",
+    "severity": "warning",
+    "message": "Please provide x-ms-examples describing minimum/maximum property set for response/request payloads for operations."
+  }
+]
diff --git a/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/global-put-ignored/validator-diagnostics.json b/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/global-put-ignored/validator-diagnostics.json
new file mode 100644
index 0000000000..fe51488c70
--- /dev/null
+++ b/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/global-put-ignored/validator-diagnostics.json
@@ -0,0 +1 @@
+[]
diff --git a/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/migration.md b/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/migration.md
new file mode 100644
index 0000000000..5b5b4eebcf
--- /dev/null
+++ b/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/migration.md
@@ -0,0 +1,261 @@
+# XmsResourceInPutResponse migration
+
+## Conclusion
+
+The migrated rule provides intentional defense-in-depth coverage for ARM authors who bypass the
+standard resource operation templates. Standard ARM templates already enforce the rule structurally.
+For manually authored PUT operations, the TypeSpec rule is functionally equivalent to the intended
+Swagger behavior: it rejects resource-shaped 200/201 response models that have neither registered ARM
+resource semantics nor an explicit `x-ms-azure-resource: true` extension.
+
+A TypeSpec rule update was required. The previous implementation used `isAzureResource`, which checks
+only whether the exact model is decorated as an ARM resource base. It therefore reported registered
+`ProxyResource` and `ExtensionResource` instances. The rule now uses `getArmResource`, the ARM
+library's registered-resource lookup, and includes a standard-template compliant regression fixture.
+
+## Source behavior
+
+- Validator source:
+  `packages/rulesets/src/spectral/functions/with-xms-resource.ts` in
+  `Azure/azure-openapi-validator`.
+- Rule registration:
+  `packages/rulesets/src/spectral/az-arm.ts` (`RPC-Put-V1-12`).
+- The selector visits PUT operations under `paths` and `x-ms-paths`.
+- `getReturnedSchema` selects the first schema under response `200`, then `201`.
+- `isXmsResource` accepts `x-ms-azure-resource: true` on that schema or an inline `allOf` ancestor.
+  It does not dereference external `$ref` ancestors.
+
+The TypeSpec implementation visits namespace-level and interface operations in ARM provider
+namespaces, including their child namespaces, by resolving provider ownership upward. It selects HTTP
+PUT and checks the first model body for status 200 and then 201. A response is compliant when it is a
+registered ARM resource or has an explicit extension in its base-model hierarchy. The diagnostic
+targets the response model. Global operations are ignored even when an unrelated ARM provider
+namespace exists elsewhere in the program.
+
+## Existing TypeSpec coverage classification
+
+**Partial:** standard ARM templates and base types emit the required extension, as recorded for
+`RPC-Put-V1-12` in
+`website/src/content/docs/docs/howtos/ARM/rpc-guidelines-coverage.md`. The local rule covers the
+remaining manually authored operation shape, which requires bypassing the standard operation
+templates. The enabled official `arm-resource-operation-response` rule validates resource schema
+consistency, but does not reproduce this extension check for raw operations.
+
+## Emission matrix
+
+The relevant emitter branch is
+`packages/typespec-autorest/src/openapi.ts`, where a model recognized by `isAzureResource` receives
+`x-ms-azure-resource: true`. Explicit OpenAPI extensions are emitted by the normal model-extension
+path.
+
+| Authored TypeSpec shape                                                                    | Emitter/result                                                                    | Swagger                     | TypeSpec  | Fixture                                       |
+| ------------------------------------------------------------------------------------------ | --------------------------------------------------------------------------------- | --------------------------- | --------- | --------------------------------------------- |
+| Manual PUT returning resource-shaped model without ARM registration or extension           | Model schema has no `x-ms-azure-resource`                                         | violation                   | violation | `put-missing-azure-resource`                  |
+| Manual interface PUT returning resource-shaped model without ARM registration or extension | Model schema has no `x-ms-azure-resource`                                         | violation                   | violation | `put-interface-missing-azure-resource`        |
+| Manual PUT in a child provider namespace returning an unmarked resource-shaped model       | Model schema has no `x-ms-azure-resource`                                         | violation                   | violation | `put-nested-namespace-missing-azure-resource` |
+| Manual PUT returning model with explicit `@extension("x-ms-azure-resource", true)`         | Model schema has the extension                                                    | compliant                   | compliant | `put-with-azure-resource`                     |
+| Standard PUT returning registered `TrackedResource`                                        | Concrete schema inherits the marked common-types resource through external `$ref` | validator defect: violation | compliant | `put-arm-resource`                            |
+| Manual PATCH returning resource-shaped model without extension                             | Schema lacks extension, but selector excludes PATCH                               | compliant                   | compliant | `patch-ignored`                               |
+| Global PUT outside an ARM provider namespace                                               | Not emitted as an ARM service operation                                           | not applicable              | ignored   | `global-put-ignored`                          |
+
+Response bodies without a model are ignored by both implementations. The rule deliberately limits
+manual response candidates to models with inherited or direct `name` and `type` properties, avoiding
+false positives on arbitrary PUT response bodies outside the ARM resource shape.
+
+## Coverage report reconciliation
+
+Both reports use different snapshots and coverage definitions; their percentages are not directly
+comparable.
+
+| Report                                                   | Population/revision                                                                                                   | Row                                                                                                  |
+| -------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------- |
+| `packages/typespec-lintdiff/docs/coverage_old.md`        | External aggregate snapshot; no reconstructable per-project list                                                      | `lint`, validator fired in 391 projects, local lint credited in 2, official in 0, 0.5%               |
+| `packages/typespec-lintdiff/specs/coverage-breakdown.md` | specs `f6b53f105b95da05276530a0754a1c71b4f16397`; generated 2026-08-10; 468 source projects, 462 successful, 6 failed | production lint; validator 13 projects/47 diagnostics, TypeSpec 3 projects/10 diagnostics, overlap 0 |
+
+The checked-in validator shard was generated on 2026-08-06 and contains 155 raw occurrences in 14
+projects; the later coverage report uses its aligned successful-project/filter population and retains
+47 diagnostics in 13 projects. These are emitted OpenAPI occurrences, not TypeSpec source identities.
+
+### Project sets before this fix
+
+- **Overlap:** none.
+- **TypeSpec-only:** `specification/apicenter/ApiCenter.Management`,
+  `specification/management/resource-manager/Microsoft.Management/ManagementGroups`,
+  `specification/resources/resource-manager/Microsoft.Authorization/policy`.
+- **Validator-only:** Application Insights AnalyticsItems, ComponentAPIs, and Favorites; Automation;
+  Compute; Confluent; Datadog; Guest Configuration Assignments; Key Vault; Recovery Services;
+  Resources; SQL; and Web/AppService.
+- **Compile failures:** six projects in the corpus. The checked-in breakdown marks no validator
+  projects for this rule as unassessed, so they do not reduce this rule's assessable validator set.
+
+The ten TypeSpec-only diagnostics all target registered `ProxyResource` or `ExtensionResource`
+models. They are false positives caused by using the ARM base-marker API instead of the registered
+resource lookup and are fixed here. The validator-only set reflects the Swagger helper's failure to
+dereference external common-types ancestry; copying that emitted-reference defect would make the
+semantic TypeSpec rule less correct.
+
+### Post-fix full corpus
+
+The full 468-project corpus completed on 2026-09-04 at specs commit
+`f6b53f105b95da05276530a0754a1c71b4f16397`: 462 projects compiled and 6 failed.
+The refreshed, selected-version row contains 13 validator projects and 47 validator diagnostics and
+20 TypeSpec projects and 60 diagnostics. Nine projects overlap:
+
+- `specification/automation/Automation.Management`
+- `specification/compute/resource-manager/Microsoft.Compute/Compute/Compute`
+- `specification/confluent/resource-manager/Microsoft.Confluent/Confluent`
+- `specification/datadog/resource-manager/Microsoft.Datadog/Datadog`
+- `specification/guestconfiguration/resource-manager/Microsoft.GuestConfiguration/Assignments`
+- `specification/keyvault/resource-manager/Microsoft.KeyVault/KeyVault`
+- `specification/recoveryservices/resource-manager/Microsoft.RecoveryServices/RecoveryServices`
+- `specification/sql/resource-manager/Microsoft.Sql/SQL`
+- `specification/web/resource-manager/Microsoft.Web/AppService`
+
+The four validator-only projects are:
+
+- `specification/applicationinsights/resource-manager/Microsoft.Insights/ApplicationInsights/AnalyticsItems`
+- `specification/applicationinsights/resource-manager/Microsoft.Insights/ApplicationInsights/ComponentAPIs`
+- `specification/applicationinsights/resource-manager/Microsoft.Insights/ApplicationInsights/Favorites`
+- `specification/resources/resource-manager/Microsoft.Resources/resources`
+
+The eleven TypeSpec-only projects are:
+
+- `specification/advisor/resource-manager/Microsoft.Advisor/Advisor`
+- `specification/apimanagement/resource-manager/Microsoft.ApiManagement/ApiManagement`
+- `specification/appconfiguration/resource-manager/Microsoft.AppConfiguration/AppConfiguration`
+- `specification/applicationinsights/resource-manager/Microsoft.Insights/ApplicationInsights/Components`
+- `specification/applicationinsights/resource-manager/Microsoft.Insights/ApplicationInsights/WebTestsApi`
+- `specification/azure-kusto/resource-manager/Microsoft.Kusto/Kusto`
+- `specification/containerinstance/resource-manager/Microsoft.ContainerInstance/ContainerInstance`
+- `specification/frontdoor/resource-manager/Microsoft.Network/FrontDoor`
+- `specification/operationalinsights/resource-manager/Microsoft.OperationalInsights/OperationalInsights`
+- `specification/solutions/Solutions.Management`
+- `specification/trafficmanager/resource-manager/Microsoft.Network/TrafficManager`
+
+No validator project for this rule was unassessed. The corpus runner projects the rules in its
+projected-rule set to each project's selected API version before creating this row, so these 60
+TypeSpec diagnostics belong to the selected-version comparison rather than only to older versions.
+The additional TypeSpec-only projects contain custom or legacy resource shapes not represented as
+violations in the retained Swagger population; they are intentional defense-in-depth findings.
+
+### Gap example: registered resource false positive
+
+- **Classification:** TypeSpec-only
+- **Status:** fixed
+- **Project/API version:** `specification/apicenter/ApiCenter.Management` / corpus-selected version
+- **Source:** `MetadataSchema.tsp:14`
+
+**TypeSpec source**
+
+```typespec
+@parentResource(Service)
+model MetadataSchema is ProxyResource<MetadataSchemaProperties> {
+  name: string;
+}
+```
+
+**Emitted OpenAPI or validator behavior**
+
+```json
+{ "x-ms-azure-resource": true }
+```
+
+| Engine            | Observed result                                                                   |
+| ----------------- | --------------------------------------------------------------------------------- |
+| Swagger validator | No intended diagnostic because the ARM resource schema carries the extension      |
+| TypeSpec lint     | Previously diagnosed the registered resource; now accepts it via `getArmResource` |
+
+**Explanation:** `isAzureResource` marks only the exact ARM base model. `getArmResource` recognizes
+the registered concrete resource that the emitter treats as an ARM resource.
+
+**Disposition:** production rule fix and `put-arm-resource` regression fixture.
+
+### Gap example: unresolved external `$ref` ancestry
+
+- **Classification:** validator-only
+- **Status:** intentional
+- **Project/API version:** validator-only projects listed above / corpus-selected latest versions
+- **Source:** emitted resource response schemas inheriting common-types resources
+
+**TypeSpec source**
+
+```typespec
+model Widget is TrackedResource<WidgetProperties>;
+```
+
+**Emitted OpenAPI or validator behavior**
+
+```json
+{
+  "allOf": [
+    {
+      "$ref": "../../../../../common-types/resource-management/v3/types.json#/definitions/TrackedResource"
+    }
+  ]
+}
+```
+
+| Engine            | Observed result                                                                                 |
+| ----------------- | ----------------------------------------------------------------------------------------------- |
+| Swagger validator | Can report because `isXmsResource` recursively inspects objects but does not dereference `$ref` |
+| TypeSpec lint     | Accepts the registered ARM resource                                                             |
+
+**Explanation:** the validator's emitted-document lookup limitation is not an authorable semantic
+violation. ARM templates and the emitter retain the intended resource semantics.
+
+**Disposition:** intentional semantic correction; do not copy the validator defect.
+
+### Gap example: explicitly unmarked legacy custom resource
+
+- **Classification:** TypeSpec-only
+- **Status:** intentional
+- **Project/API version:** `specification/appconfiguration/resource-manager/Microsoft.AppConfiguration/AppConfiguration` / corpus-selected version
+- **Source:** `Snapshot.tsp:22`
+
+**TypeSpec source**
+
+```typespec
+@parentResource(ConfigurationStore)
+model Snapshot is Azure.ResourceManager.Legacy.CustomAzureProxyResource<false> {
+  properties: SnapshotProperties;
+}
+```
+
+**Emitted OpenAPI or validator behavior**
+
+```typespec
+@customAzureResource(#{ isAzureResource: false })
+model CustomAzureProxyResource extends Foundations.ProxyResource {}
+```
+
+| Engine            | Observed result                                                                   |
+| ----------------- | --------------------------------------------------------------------------------- |
+| Swagger validator | No diagnostic in the retained selected Swagger population                         |
+| TypeSpec lint     | Diagnostic because the custom resource explicitly disables Azure-resource marking |
+
+**Explanation:** `packages/typespec-autorest/src/openapi.ts` emits `x-ms-azure-resource` only when
+the resource-base marker is present or custom-resource options set `isAzureResource: true`. The
+authored `false` option therefore represents the exact missing semantic checked by this rule.
+
+**Disposition:** intentional extra defense-in-depth coverage in converted TypeSpec.
+
+## Diagnostic cardinality
+
+Before this fix, the aligned report had 47 validator findings and 10 TypeSpec source findings. The
+final selected-version row has 47 validator and 60 TypeSpec findings. The complete retained validator
+shard contains 155 emitted occurrences: 137 unique project + Swagger file + JSON-path identities and
+57 unique project + JSON-path identities. The complete TypeSpec shard contains 167 occurrences and
+145 unique project + source file + line + column identities before selected-version projection.
+The validator and TypeSpec identities describe different domains, so they are preserved rather than
+presented as one-to-one equivalents.
+
+## Required changes
+
+- Use the ARM registered-resource lookup in
+  `src/rules/xms-resource-in-put-response.ts`.
+- Add a standard ARM resource/template compliant regression fixture.
+- Refresh focused snapshots and rerun the full corpus (completed).
+
+Functional equivalence concerns intended behavior, not raw count equality. Remaining validator-only
+findings are known external-reference artifacts; final post-fix corpus counts are recorded after the
+full rerun.
diff --git a/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/patch-ignored/expect.json b/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/patch-ignored/expect.json
index 5ad0145078..4437a09deb 100644
--- a/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/patch-ignored/expect.json
+++ b/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/patch-ignored/expect.json
@@ -5,6 +5,10 @@
       "code": "tsp-lintdiff-local-linter/latest-version-of-common-types-must-be-used",
       "count": 1
     },
+    {
+      "code": "tsp-lintdiff-local-linter/unsupported-patch-properties",
+      "count": 2
+    },
     {
       "code": "tsp-lintdiff-local-linter/xms-examples-required",
       "count": 1
diff --git a/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/patch-ignored/tsp-diagnostics.json b/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/patch-ignored/tsp-diagnostics.json
index a2ad996846..ada4f9504f 100644
--- a/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/patch-ignored/tsp-diagnostics.json
+++ b/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/patch-ignored/tsp-diagnostics.json
@@ -4,6 +4,16 @@
     "severity": "warning",
     "message": "Use the latest ARM common-types version 'v6' instead of 'v3'."
   },
+  {
+    "code": "tsp-lintdiff-local-linter/unsupported-patch-properties",
+    "severity": "warning",
+    "message": "PATCH request body property 'name' is not patchable and should be removed or made read-only/immutable."
+  },
+  {
+    "code": "tsp-lintdiff-local-linter/unsupported-patch-properties",
+    "severity": "warning",
+    "message": "PATCH request body property 'type' is not patchable and should be removed or made read-only/immutable."
+  },
   {
     "code": "tsp-lintdiff-local-linter/xms-examples-required",
     "severity": "warning",
diff --git a/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/put-arm-resource/expect.json b/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/put-arm-resource/expect.json
new file mode 100644
index 0000000000..219f35bd8c
--- /dev/null
+++ b/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/put-arm-resource/expect.json
@@ -0,0 +1,19 @@
+{
+  "violation": false,
+  "ambientDiagnostics": [
+    {
+      "code": "tsp-lintdiff-local-linter/latest-version-of-common-types-must-be-used",
+      "count": 1
+    },
+    {
+      "code": "tsp-lintdiff-local-linter/xms-examples-required",
+      "count": 1
+    }
+  ],
+  "validatorDiagnostics": [
+    {
+      "code": "XmsResourceInPutResponse",
+      "count": 1
+    }
+  ]
+}
diff --git a/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/put-arm-resource/main.tsp b/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/put-arm-resource/main.tsp
new file mode 100644
index 0000000000..90ec8683de
--- /dev/null
+++ b/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/put-arm-resource/main.tsp
@@ -0,0 +1,34 @@
+import "../../lib/imports.tsp";
+
+using TypeSpec.Versioning;
+using Azure.ResourceManager;
+
+@armProviderNamespace
+@service(#{ title: "Test Service" })
+@versioned(Versions)
+namespace Microsoft.TestService;
+
+enum Versions {
+  @useDependency(Azure.ResourceManager.CommonTypes.Versions.v5)
+  @armCommonTypesVersion(Azure.ResourceManager.CommonTypes.Versions.v3)
+  v2024_01_01: "2024-01-01",
+}
+
+interface Operations extends Azure.ResourceManager.Operations {}
+
+/** A widget resource. */
+model Widget is TrackedResource<WidgetProperties> {
+  ...ResourceNameParameter<Widget>;
+}
+
+/** Widget properties. */
+model WidgetProperties {
+  /** A display name. */
+  displayName?: string;
+}
+
+@armResourceOperations
+interface Widgets {
+  /** Creates or replaces a widget. */
+  createOrUpdate is ArmResourceCreateOrReplaceSync<Widget>;
+}
diff --git a/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/put-arm-resource/output.json b/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/put-arm-resource/output.json
new file mode 100644
index 0000000000..82016f012d
--- /dev/null
+++ b/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/put-arm-resource/output.json
@@ -0,0 +1,166 @@
+{
+  "swagger": "2.0",
+  "info": {
+    "title": "Test Service",
+    "version": "2024-01-01",
+    "x-typespec-generated": [
+      {
+        "emitter": "@azure-tools/typespec-autorest"
+      }
+    ]
+  },
+  "schemes": [
+    "https"
+  ],
+  "host": "management.azure.com",
+  "produces": [
+    "application/json"
+  ],
+  "consumes": [
+    "application/json"
+  ],
+  "security": [
+    {
+      "azure_auth": [
+        "user_impersonation"
+      ]
+    }
+  ],
+  "securityDefinitions": {
+    "azure_auth": {
+      "type": "oauth2",
+      "description": "Azure Active Directory OAuth2 Flow.",
+      "flow": "implicit",
+      "authorizationUrl": "https://login.microsoftonline.com/common/oauth2/authorize",
+      "scopes": {
+        "user_impersonation": "impersonate your user account"
+      }
+    }
+  },
+  "tags": [
+    {
+      "name": "Operations"
+    },
+    {
+      "name": "Widgets"
+    }
+  ],
+  "paths": {
+    "/providers/Microsoft.TestService/operations": {
+      "get": {
+        "operationId": "Operations_List",
+        "tags": [
+          "Operations"
+        ],
+        "description": "List the operations for the provider",
+        "parameters": [
+          {
+            "$ref": "../../../../../common-types/resource-management/v3/types.json#/parameters/ApiVersionParameter"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "Azure operation completed successfully.",
+            "schema": {
+              "$ref": "../../../../../common-types/resource-management/v3/types.json#/definitions/OperationListResult"
+            }
+          },
+          "default": {
+            "description": "An unexpected error response.",
+            "schema": {
+              "$ref": "../../../../../common-types/resource-management/v3/types.json#/definitions/ErrorResponse"
+            }
+          }
+        },
+        "x-ms-pageable": {
+          "nextLinkName": "nextLink"
+        }
+      }
+    },
+    "/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.TestService/widgets/{widgetName}": {
+      "put": {
+        "operationId": "Widgets_CreateOrUpdate",
+        "tags": [
+          "Widgets"
+        ],
+        "description": "Creates or replaces a widget.",
+        "parameters": [
+          {
+            "$ref": "../../../../../common-types/resource-management/v3/types.json#/parameters/ApiVersionParameter"
+          },
+          {
+            "$ref": "../../../../../common-types/resource-management/v3/types.json#/parameters/SubscriptionIdParameter"
+          },
+          {
+            "$ref": "../../../../../common-types/resource-management/v3/types.json#/parameters/ResourceGroupNameParameter"
+          },
+          {
+            "name": "widgetName",
+            "in": "path",
+            "description": "The name of the Widget",
+            "required": true,
+            "type": "string",
+            "pattern": "^[a-zA-Z0-9-]{3,24}$"
+          },
+          {
+            "name": "resource",
+            "in": "body",
+            "description": "Resource create parameters.",
+            "required": true,
+            "schema": {
+              "$ref": "#/definitions/Widget"
+            }
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "Resource 'Widget' update operation succeeded",
+            "schema": {
+              "$ref": "#/definitions/Widget"
+            }
+          },
+          "201": {
+            "description": "Resource 'Widget' create operation succeeded",
+            "schema": {
+              "$ref": "#/definitions/Widget"
+            }
+          },
+          "default": {
+            "description": "An unexpected error response.",
+            "schema": {
+              "$ref": "../../../../../common-types/resource-management/v3/types.json#/definitions/ErrorResponse"
+            }
+          }
+        }
+      }
+    }
+  },
+  "definitions": {
+    "Widget": {
+      "type": "object",
+      "description": "A widget resource.",
+      "properties": {
+        "properties": {
+          "$ref": "#/definitions/WidgetProperties",
+          "description": "The resource-specific properties for this resource."
+        }
+      },
+      "allOf": [
+        {
+          "$ref": "../../../../../common-types/resource-management/v3/types.json#/definitions/TrackedResource"
+        }
+      ]
+    },
+    "WidgetProperties": {
+      "type": "object",
+      "description": "Widget properties.",
+      "properties": {
+        "displayName": {
+          "type": "string",
+          "description": "A display name."
+        }
+      }
+    }
+  },
+  "parameters": {}
+}
diff --git a/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/put-arm-resource/tsp-diagnostics.json b/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/put-arm-resource/tsp-diagnostics.json
new file mode 100644
index 0000000000..378edec306
--- /dev/null
+++ b/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/put-arm-resource/tsp-diagnostics.json
@@ -0,0 +1,37 @@
+[
+  {
+    "code": "tsp-lintdiff-local-linter/all-resources-must-have-get-operation",
+    "severity": "warning",
+    "message": "Resource 'Widget' must have a get/read operation."
+  },
+  {
+    "code": "tsp-lintdiff-local-linter/latest-version-of-common-types-must-be-used",
+    "severity": "warning",
+    "message": "Use the latest ARM common-types version 'v6' instead of 'v3'."
+  },
+  {
+    "code": "tsp-lintdiff-local-linter/top-level-resources-list-by-resource-group",
+    "severity": "warning",
+    "message": "Top-level resource 'Widget' should define a list by resource group operation."
+  },
+  {
+    "code": "@azure-tools/typespec-azure-resource-manager/arm-resource-provisioning-state",
+    "severity": "warning",
+    "message": "The RP-specific property model in the 'properties' property of this resource must contain a 'provisioningState property.  The property type should be an enum or a union of string values, and it must specify known state values 'Succeeded', 'Failed', and 'Canceled'."
+  },
+  {
+    "code": "@azure-tools/typespec-azure-resource-manager/no-resource-delete-operation",
+    "severity": "warning",
+    "message": "Resource 'Widget' must have a delete operation."
+  },
+  {
+    "code": "tsp-lintdiff-local-linter/tracked-resource-patch-operation",
+    "severity": "warning",
+    "message": "Tracked resource 'Widget' must have patch operation that at least supports the update of tags."
+  },
+  {
+    "code": "tsp-lintdiff-local-linter/xms-examples-required",
+    "severity": "warning",
+    "message": "Please provide x-ms-examples describing minimum/maximum property set for response/request payloads for operations."
+  }
+]
diff --git a/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/put-arm-resource/validator-diagnostics.json b/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/put-arm-resource/validator-diagnostics.json
new file mode 100644
index 0000000000..283fc70523
--- /dev/null
+++ b/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/put-arm-resource/validator-diagnostics.json
@@ -0,0 +1,12 @@
+[
+  {
+    "code": "XmsResourceInPutResponse",
+    "message": "The 200 response model for an ARM PUT operation must have x-ms-azure-resource extension set to true in its hierarchy.Operation: Widgets_CreateOrUpdate",
+    "path": [
+      "paths",
+      "/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.TestService/widgets/{widgetName}",
+      "put"
+    ],
+    "severity": 0
+  }
+]
diff --git a/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/put-interface-missing-azure-resource/expect.json b/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/put-interface-missing-azure-resource/expect.json
new file mode 100644
index 0000000000..ba21e936b5
--- /dev/null
+++ b/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/put-interface-missing-azure-resource/expect.json
@@ -0,0 +1,3 @@
+{
+  "violation": true
+}
diff --git a/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/put-interface-missing-azure-resource/main.tsp b/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/put-interface-missing-azure-resource/main.tsp
new file mode 100644
index 0000000000..3d3a1e6c3a
--- /dev/null
+++ b/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/put-interface-missing-azure-resource/main.tsp
@@ -0,0 +1,42 @@
+import "../../lib/imports.tsp";
+
+using TypeSpec.Http;
+using TypeSpec.Rest;
+using TypeSpec.Versioning;
+using Azure.ResourceManager;
+
+@armProviderNamespace
+@service(#{ title: "Test Service" })
+@versioned(Versions)
+namespace Microsoft.TestService;
+
+enum Versions {
+  @useDependency(Azure.ResourceManager.CommonTypes.Versions.v5)
+  @armCommonTypesVersion(Azure.ResourceManager.CommonTypes.Versions.v3)
+  v2024_01_01: "2024-01-01",
+}
+
+interface Operations extends Azure.ResourceManager.Operations {}
+
+/** A custom resource without x-ms-azure-resource. */
+model CustomResource {
+  /** The resource name. */
+  name?: string;
+
+  /** The resource type. */
+  type?: string;
+}
+
+interface CustomItems {
+  /** Create a custom item. */
+  #suppress "@azure-tools/typespec-azure-resource-manager/arm-resource-operation" "Raw op needed to test swagger-level rule"
+  @route("/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.TestService/customItems/{itemName}")
+  @put
+  createCustomItem(
+    ...ApiVersionParameter,
+    ...SubscriptionIdParameter,
+    ...ResourceGroupParameter,
+    @doc("The item name.") @path itemName: string,
+    @doc("The custom resource body.") @body body: CustomResource,
+  ): CustomResource | ErrorResponse;
+}
diff --git a/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/put-interface-missing-azure-resource/output.json b/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/put-interface-missing-azure-resource/output.json
new file mode 100644
index 0000000000..448b2a9296
--- /dev/null
+++ b/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/put-interface-missing-azure-resource/output.json
@@ -0,0 +1,142 @@
+{
+  "swagger": "2.0",
+  "info": {
+    "title": "Test Service",
+    "version": "2024-01-01",
+    "x-typespec-generated": [
+      {
+        "emitter": "@azure-tools/typespec-autorest"
+      }
+    ]
+  },
+  "schemes": [
+    "https"
+  ],
+  "host": "management.azure.com",
+  "produces": [
+    "application/json"
+  ],
+  "consumes": [
+    "application/json"
+  ],
+  "security": [
+    {
+      "azure_auth": [
+        "user_impersonation"
+      ]
+    }
+  ],
+  "securityDefinitions": {
+    "azure_auth": {
+      "type": "oauth2",
+      "description": "Azure Active Directory OAuth2 Flow.",
+      "flow": "implicit",
+      "authorizationUrl": "https://login.microsoftonline.com/common/oauth2/authorize",
+      "scopes": {
+        "user_impersonation": "impersonate your user account"
+      }
+    }
+  },
+  "tags": [
+    {
+      "name": "Operations"
+    }
+  ],
+  "paths": {
+    "/providers/Microsoft.TestService/operations": {
+      "get": {
+        "operationId": "Operations_List",
+        "tags": [
+          "Operations"
+        ],
+        "description": "List the operations for the provider",
+        "parameters": [
+          {
+            "$ref": "../../../../../common-types/resource-management/v3/types.json#/parameters/ApiVersionParameter"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "Azure operation completed successfully.",
+            "schema": {
+              "$ref": "../../../../../common-types/resource-management/v3/types.json#/definitions/OperationListResult"
+            }
+          },
+          "default": {
+            "description": "An unexpected error response.",
+            "schema": {
+              "$ref": "../../../../../common-types/resource-management/v3/types.json#/definitions/ErrorResponse"
+            }
+          }
+        },
+        "x-ms-pageable": {
+          "nextLinkName": "nextLink"
+        }
+      }
+    },
+    "/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.TestService/customItems/{itemName}": {
+      "put": {
+        "operationId": "CustomItems_CreateCustomItem",
+        "description": "Create a custom item.",
+        "parameters": [
+          {
+            "$ref": "../../../../../common-types/resource-management/v3/types.json#/parameters/ApiVersionParameter"
+          },
+          {
+            "$ref": "../../../../../common-types/resource-management/v3/types.json#/parameters/SubscriptionIdParameter"
+          },
+          {
+            "$ref": "../../../../../common-types/resource-management/v3/types.json#/parameters/ResourceGroupNameParameter"
+          },
+          {
+            "name": "itemName",
+            "in": "path",
+            "description": "The item name.",
+            "required": true,
+            "type": "string"
+          },
+          {
+            "name": "body",
+            "in": "body",
+            "description": "The custom resource body.",
+            "required": true,
+            "schema": {
+              "$ref": "#/definitions/CustomResource"
+            }
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "The request has succeeded.",
+            "schema": {
+              "$ref": "#/definitions/CustomResource"
+            }
+          },
+          "default": {
+            "description": "An unexpected error response.",
+            "schema": {
+              "$ref": "../../../../../common-types/resource-management/v3/types.json#/definitions/ErrorResponse"
+            }
+          }
+        }
+      }
+    }
+  },
+  "definitions": {
+    "CustomResource": {
+      "type": "object",
+      "description": "A custom resource without x-ms-azure-resource.",
+      "properties": {
+        "name": {
+          "type": "string",
+          "description": "The resource name."
+        },
+        "type": {
+          "type": "string",
+          "description": "The resource type."
+        }
+      }
+    }
+  },
+  "parameters": {}
+}
diff --git a/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/put-interface-missing-azure-resource/tsp-diagnostics.json b/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/put-interface-missing-azure-resource/tsp-diagnostics.json
new file mode 100644
index 0000000000..b5bb193954
--- /dev/null
+++ b/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/put-interface-missing-azure-resource/tsp-diagnostics.json
@@ -0,0 +1,27 @@
+[
+  {
+    "code": "tsp-lintdiff-local-linter/latest-version-of-common-types-must-be-used",
+    "severity": "warning",
+    "message": "Use the latest ARM common-types version 'v6' instead of 'v3'."
+  },
+  {
+    "code": "@azure-tools/typespec-azure-resource-manager/arm-resource-interface-requires-decorator",
+    "severity": "warning",
+    "message": "Each resource interface must have an @armResourceOperations decorator."
+  },
+  {
+    "code": "tsp-lintdiff-local-linter/operation-id-noun-verb",
+    "severity": "warning",
+    "message": "Per the Noun_Verb convention for Operation Ids, the noun 'CustomItems' should not appear after the underscore."
+  },
+  {
+    "code": "tsp-lintdiff-local-linter/xms-examples-required",
+    "severity": "warning",
+    "message": "Please provide x-ms-examples describing minimum/maximum property set for response/request payloads for operations."
+  },
+  {
+    "code": "tsp-lintdiff-local-linter/xms-resource-in-put-response",
+    "severity": "warning",
+    "message": "PUT 200/201 response models should be Azure resources and must carry x-ms-azure-resource semantics."
+  }
+]
diff --git a/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/put-interface-missing-azure-resource/validator-diagnostics.json b/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/put-interface-missing-azure-resource/validator-diagnostics.json
new file mode 100644
index 0000000000..8af9fb67e2
--- /dev/null
+++ b/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/put-interface-missing-azure-resource/validator-diagnostics.json
@@ -0,0 +1,12 @@
+[
+  {
+    "code": "XmsResourceInPutResponse",
+    "message": "The 200 response model for an ARM PUT operation must have x-ms-azure-resource extension set to true in its hierarchy.Operation: CustomItems_CreateCustomItem",
+    "path": [
+      "paths",
+      "/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.TestService/customItems/{itemName}",
+      "put"
+    ],
+    "severity": 0
+  }
+]
diff --git a/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/put-nested-namespace-missing-azure-resource/expect.json b/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/put-nested-namespace-missing-azure-resource/expect.json
new file mode 100644
index 0000000000..ba21e936b5
--- /dev/null
+++ b/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/put-nested-namespace-missing-azure-resource/expect.json
@@ -0,0 +1,3 @@
+{
+  "violation": true
+}
diff --git a/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/put-nested-namespace-missing-azure-resource/main.tsp b/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/put-nested-namespace-missing-azure-resource/main.tsp
new file mode 100644
index 0000000000..1026cd487a
--- /dev/null
+++ b/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/put-nested-namespace-missing-azure-resource/main.tsp
@@ -0,0 +1,42 @@
+import "../../lib/imports.tsp";
+
+using TypeSpec.Http;
+using TypeSpec.Rest;
+using TypeSpec.Versioning;
+using Azure.ResourceManager;
+
+@armProviderNamespace
+@service(#{ title: "Test Service" })
+@versioned(Versions)
+namespace Microsoft.TestService {
+  enum Versions {
+    @useDependency(Azure.ResourceManager.CommonTypes.Versions.v5)
+    @armCommonTypesVersion(Azure.ResourceManager.CommonTypes.Versions.v3)
+    v2024_01_01: "2024-01-01",
+  }
+
+  interface Operations extends Azure.ResourceManager.Operations {}
+
+  namespace Custom {
+    /** A custom resource without x-ms-azure-resource. */
+    model CustomResource {
+      /** The resource name. */
+      name?: string;
+
+      /** The resource type. */
+      type?: string;
+    }
+
+    /** Create a custom item. */
+    #suppress "@azure-tools/typespec-azure-resource-manager/arm-resource-operation" "Raw op needed to test nested provider ownership"
+    @route("/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.TestService/customItems/{itemName}")
+    @put
+    op createCustomItem(
+      ...ApiVersionParameter,
+      ...SubscriptionIdParameter,
+      ...ResourceGroupParameter,
+      @doc("The item name.") @path itemName: string,
+      @doc("The custom resource body.") @body body: CustomResource,
+    ): CustomResource | ErrorResponse;
+  }
+}
diff --git a/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/put-nested-namespace-missing-azure-resource/output.json b/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/put-nested-namespace-missing-azure-resource/output.json
new file mode 100644
index 0000000000..43690abf95
--- /dev/null
+++ b/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/put-nested-namespace-missing-azure-resource/output.json
@@ -0,0 +1,142 @@
+{
+  "swagger": "2.0",
+  "info": {
+    "title": "Test Service",
+    "version": "2024-01-01",
+    "x-typespec-generated": [
+      {
+        "emitter": "@azure-tools/typespec-autorest"
+      }
+    ]
+  },
+  "schemes": [
+    "https"
+  ],
+  "host": "management.azure.com",
+  "produces": [
+    "application/json"
+  ],
+  "consumes": [
+    "application/json"
+  ],
+  "security": [
+    {
+      "azure_auth": [
+        "user_impersonation"
+      ]
+    }
+  ],
+  "securityDefinitions": {
+    "azure_auth": {
+      "type": "oauth2",
+      "description": "Azure Active Directory OAuth2 Flow.",
+      "flow": "implicit",
+      "authorizationUrl": "https://login.microsoftonline.com/common/oauth2/authorize",
+      "scopes": {
+        "user_impersonation": "impersonate your user account"
+      }
+    }
+  },
+  "tags": [
+    {
+      "name": "Operations"
+    }
+  ],
+  "paths": {
+    "/providers/Microsoft.TestService/operations": {
+      "get": {
+        "operationId": "Operations_List",
+        "tags": [
+          "Operations"
+        ],
+        "description": "List the operations for the provider",
+        "parameters": [
+          {
+            "$ref": "../../../../../common-types/resource-management/v3/types.json#/parameters/ApiVersionParameter"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "Azure operation completed successfully.",
+            "schema": {
+              "$ref": "../../../../../common-types/resource-management/v3/types.json#/definitions/OperationListResult"
+            }
+          },
+          "default": {
+            "description": "An unexpected error response.",
+            "schema": {
+              "$ref": "../../../../../common-types/resource-management/v3/types.json#/definitions/ErrorResponse"
+            }
+          }
+        },
+        "x-ms-pageable": {
+          "nextLinkName": "nextLink"
+        }
+      }
+    },
+    "/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.TestService/customItems/{itemName}": {
+      "put": {
+        "operationId": "Custom_CreateCustomItem",
+        "description": "Create a custom item.",
+        "parameters": [
+          {
+            "$ref": "../../../../../common-types/resource-management/v3/types.json#/parameters/ApiVersionParameter"
+          },
+          {
+            "$ref": "../../../../../common-types/resource-management/v3/types.json#/parameters/SubscriptionIdParameter"
+          },
+          {
+            "$ref": "../../../../../common-types/resource-management/v3/types.json#/parameters/ResourceGroupNameParameter"
+          },
+          {
+            "name": "itemName",
+            "in": "path",
+            "description": "The item name.",
+            "required": true,
+            "type": "string"
+          },
+          {
+            "name": "body",
+            "in": "body",
+            "description": "The custom resource body.",
+            "required": true,
+            "schema": {
+              "$ref": "#/definitions/Custom.CustomResource"
+            }
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "The request has succeeded.",
+            "schema": {
+              "$ref": "#/definitions/Custom.CustomResource"
+            }
+          },
+          "default": {
+            "description": "An unexpected error response.",
+            "schema": {
+              "$ref": "../../../../../common-types/resource-management/v3/types.json#/definitions/ErrorResponse"
+            }
+          }
+        }
+      }
+    }
+  },
+  "definitions": {
+    "Custom.CustomResource": {
+      "type": "object",
+      "description": "A custom resource without x-ms-azure-resource.",
+      "properties": {
+        "name": {
+          "type": "string",
+          "description": "The resource name."
+        },
+        "type": {
+          "type": "string",
+          "description": "The resource type."
+        }
+      }
+    }
+  },
+  "parameters": {}
+}
diff --git a/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/put-nested-namespace-missing-azure-resource/tsp-diagnostics.json b/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/put-nested-namespace-missing-azure-resource/tsp-diagnostics.json
new file mode 100644
index 0000000000..5fdc6dca9a
--- /dev/null
+++ b/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/put-nested-namespace-missing-azure-resource/tsp-diagnostics.json
@@ -0,0 +1,27 @@
+[
+  {
+    "code": "tsp-lintdiff-local-linter/latest-version-of-common-types-must-be-used",
+    "severity": "warning",
+    "message": "Use the latest ARM common-types version 'v6' instead of 'v3'."
+  },
+  {
+    "code": "tsp-lintdiff-local-linter/operation-id-noun-verb",
+    "severity": "warning",
+    "message": "Per the Noun_Verb convention for Operation Ids, the noun 'Custom' should not appear after the underscore."
+  },
+  {
+    "code": "tsp-lintdiff-local-linter/path-parameter-schema",
+    "severity": "warning",
+    "message": "Path parameter should specify a maximum length (maxLength) and characters allowed (pattern)."
+  },
+  {
+    "code": "tsp-lintdiff-local-linter/xms-examples-required",
+    "severity": "warning",
+    "message": "Please provide x-ms-examples describing minimum/maximum property set for response/request payloads for operations."
+  },
+  {
+    "code": "tsp-lintdiff-local-linter/xms-resource-in-put-response",
+    "severity": "warning",
+    "message": "PUT 200/201 response models should be Azure resources and must carry x-ms-azure-resource semantics."
+  }
+]
diff --git a/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/put-nested-namespace-missing-azure-resource/validator-diagnostics.json b/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/put-nested-namespace-missing-azure-resource/validator-diagnostics.json
new file mode 100644
index 0000000000..8a9775f1bc
--- /dev/null
+++ b/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/put-nested-namespace-missing-azure-resource/validator-diagnostics.json
@@ -0,0 +1,12 @@
+[
+  {
+    "code": "XmsResourceInPutResponse",
+    "message": "The 200 response model for an ARM PUT operation must have x-ms-azure-resource extension set to true in its hierarchy.Operation: Custom_CreateCustomItem",
+    "path": [
+      "paths",
+      "/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.TestService/customItems/{itemName}",
+      "put"
+    ],
+    "severity": 0
+  }
+]
diff --git a/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/rule.md b/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/rule.md
index 39116c3369..0df1c50ba3 100644
--- a/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/rule.md
+++ b/packages/typespec-lintdiff/test/fixtures/XmsResourceInPutResponse/rule.md
@@ -67,8 +67,12 @@ PUT 200 response models must have `x-ms-azure-resource` in their hierarchy.
 The repaired local suite covers the strongest useful upstream semantic matrix:
 
 - `put` + response schema without `x-ms-azure-resource` => invalid
+- interface `put` + response schema without `x-ms-azure-resource` => invalid
+- nested provider namespace `put` + response schema without `x-ms-azure-resource` => invalid
 - `put` + response schema with explicit `x-ms-azure-resource` => valid
+- standard ARM `put` + registered resource response => valid
 - `patch` + response schema without `x-ms-azure-resource` => ignored by selector
+- global `put` outside the ARM provider namespace => ignored
 
 What remains distinct from the upstream Swagger helper is that the local lint
 uses TypeSpec/ARM resource semantics directly instead of reproducing the
@@ -77,8 +81,12 @@ defense-in-depth check.
 
 ## Test Cases
 
-| ID | Violation | Description |
-| --- | --------- | ----------- |
-| `put-missing-azure-resource` | true | Raw ARM-style PUT returns a custom model without `x-ms-azure-resource` |
-| `put-with-azure-resource` | false | Raw ARM-style PUT returns a model with explicit `x-ms-azure-resource: true` |
-| `patch-ignored` | false | Raw ARM-style PATCH returns a non-resource model but is ignored because the rule only selects PUT |
+| ID                                            | Violation | Description                                                                                                                        |
+| --------------------------------------------- | --------- | ---------------------------------------------------------------------------------------------------------------------------------- |
+| `put-missing-azure-resource`                  | true      | Raw ARM-style PUT returns a custom model without `x-ms-azure-resource`                                                             |
+| `put-interface-missing-azure-resource`        | true      | Raw ARM-style interface PUT returns a custom model without `x-ms-azure-resource`                                                   |
+| `put-nested-namespace-missing-azure-resource` | true      | Raw PUT in a child of the ARM provider namespace returns a custom model without `x-ms-azure-resource`                              |
+| `put-with-azure-resource`                     | false     | Raw ARM-style PUT returns a model with explicit `x-ms-azure-resource: true`                                                        |
+| `put-arm-resource`                            | false     | Standard ARM PUT returns a registered resource; the expected validator-only diagnostic records its external-`$ref` ancestry defect |
+| `patch-ignored`                               | false     | Raw ARM-style PATCH returns a non-resource model but is ignored because the rule only selects PUT                                  |
+| `global-put-ignored`                          | false     | Global PUT is ignored even when an unrelated ARM provider service exists in the program                                            |