From 8260bea3f78adb3c0fb9c8c5491acbcf29dee701 Mon Sep 17 00:00:00 2001
From: "Jiao Di (MSFT)" <80496810+v-jiaodi@users.noreply.github.com>
Date: Wed, 9 Jul 2025 14:55:12 +0800
Subject: [PATCH 1/6] update codegen default behavior for is-modular-library
 true

---
 .../typespec-ts/src/transform/transfromRLCOptions.ts  | 11 ++---------
 1 file changed, 2 insertions(+), 9 deletions(-)

diff --git a/packages/typespec-ts/src/transform/transfromRLCOptions.ts b/packages/typespec-ts/src/transform/transfromRLCOptions.ts
index ad609bb67c..035367b11a 100644
--- a/packages/typespec-ts/src/transform/transfromRLCOptions.ts
+++ b/packages/typespec-ts/src/transform/transfromRLCOptions.ts
@@ -5,8 +5,7 @@ import {
   PackageDetails,
   PackageFlavor,
   RLCOptions,
-  ServiceInfo,
-  isAzurePackage
+  ServiceInfo
 } from "@azure-tools/rlc-common";
 import { getHttpOperationWithCache } from "@azure-tools/typespec-client-generator-core";
 import { getDoc, NoTarget, Program } from "@typespec/compiler";
@@ -34,13 +33,7 @@ export function transformRLCOptions(
     emitterOptions,
     dpgContext.generationPathDetail?.rootDir ?? ""
   );
-  if (
-    !isAzurePackage({ options }) &&
-    emitterOptions["is-modular-library"] !== false
-  ) {
-    options.isModularLibrary = true;
-  }
-  if (dpgContext.arm && emitterOptions["is-modular-library"] !== false) {
+  if (emitterOptions["is-modular-library"] !== false) {
     options.isModularLibrary = true;
   }
   const batch = getRLCClients(dpgContext);

From 868150b347f47d4633a85b2722867fa4e90696fb Mon Sep 17 00:00:00 2001
From: "Jiao Di (MSFT)" <80496810+v-jiaodi@users.noreply.github.com>
Date: Wed, 9 Jul 2025 15:29:40 +0800
Subject: [PATCH 2/6] update

---
 packages/typespec-test/test/contoso/tspconfig.yaml       | 1 +
 packages/typespec-test/test/customWrapper/tspconfig.yaml | 1 +
 packages/typespec-test/test/faceai/tspconfig.yaml        | 1 +
 3 files changed, 3 insertions(+)

diff --git a/packages/typespec-test/test/contoso/tspconfig.yaml b/packages/typespec-test/test/contoso/tspconfig.yaml
index e2e77dcb69..6d0ce986eb 100644
--- a/packages/typespec-test/test/contoso/tspconfig.yaml
+++ b/packages/typespec-test/test/contoso/tspconfig.yaml
@@ -7,6 +7,7 @@ options:
   "@azure-tools/typespec-ts":
     emitter-output-dir: "{project-root}/generated/typespec-ts"
     azure-sdk-for-js: false
+    is-modular-library: false
     package-details:
       name: "@azure-rest/contosowidgetmanager-rest"
       description: "Contoso WidgetManager Service"
diff --git a/packages/typespec-test/test/customWrapper/tspconfig.yaml b/packages/typespec-test/test/customWrapper/tspconfig.yaml
index d3a2b278de..46a6782601 100644
--- a/packages/typespec-test/test/customWrapper/tspconfig.yaml
+++ b/packages/typespec-test/test/customWrapper/tspconfig.yaml
@@ -4,6 +4,7 @@ options:
   "@azure-tools/typespec-ts":
     azure-sdk-for-js: false
     emitter-output-dir: "{project-root}/generated/typespec-ts"
+    is-modular-library: false
     package-details:
       name: "@msinternal/customWrapper"
       description: "Custom Wrapper Service"
diff --git a/packages/typespec-test/test/faceai/tspconfig.yaml b/packages/typespec-test/test/faceai/tspconfig.yaml
index 9f4345688f..0886c5349c 100644
--- a/packages/typespec-test/test/faceai/tspconfig.yaml
+++ b/packages/typespec-test/test/faceai/tspconfig.yaml
@@ -5,6 +5,7 @@ options:
     generate-metadata: true
     generate-test: true
     azure-sdk-for-js: false
+    is-modular-library: false
     emitter-output-dir: "{project-root}/generated/typespec-ts"
     package-details:
       name: "@azure-rest/ai-face-rest"

From 84e93dd8fbb57ffdc876ff2c2ff87dfffcecb932 Mon Sep 17 00:00:00 2001
From: "Jiao Di (MSFT)" <80496810+v-jiaodi@users.noreply.github.com>
Date: Wed, 9 Jul 2025 15:54:51 +0800
Subject: [PATCH 3/6] update

---
 .../generated/authentication/api-key/tspconfig.yaml              | 1 +
 .../generated/authentication/http/custom/tspconfig.yaml          | 1 +
 .../generated/authentication/oauth2/tspconfig.yaml               | 1 +
 .../generated/authentication/union/tspconfig.yaml                | 1 +
 .../generated/azure/client-generator-core/access/tspconfig.yaml  | 1 +
 .../client-generator-core/client-initialization/tspconfig.yaml   | 1 +
 .../azure/client-generator-core/client-location/tspconfig.yaml   | 1 +
 .../deserialize-empty-string-as-null/tspconfig.yaml              | 1 +
 .../azure/client-generator-core/flatten-property/tspconfig.yaml  | 1 +
 .../generated/azure/client-generator-core/usage/tspconfig.yaml   | 1 +
 .../azureIntegration/generated/azure/core/basic/tspconfig.yaml   | 1 +
 .../azureIntegration/generated/azure/core/lro/rpc/tspconfig.yaml | 1 +
 .../generated/azure/core/lro/standard/tspconfig.yaml             | 1 +
 .../azureIntegration/generated/azure/core/model/tspconfig.yaml   | 1 +
 .../azureIntegration/generated/azure/core/page/tspconfig.yaml    | 1 +
 .../azureIntegration/generated/azure/core/scalar/tspconfig.yaml  | 1 +
 .../azureIntegration/generated/azure/core/traits/tspconfig.yaml  | 1 +
 .../azure/special-headers/client-request-id/tspconfig.yaml       | 1 +
 .../azureIntegration/generated/client/namespace/tspconfig.yaml   | 1 +
 .../test/azureIntegration/generated/client/naming/tspconfig.yaml | 1 +
 .../client/structure/client-operation-group/tspconfig.yaml       | 1 +
 .../generated/client/structure/default/tspconfig.yaml            | 1 +
 .../generated/client/structure/multi-client/tspconfig.yaml       | 1 +
 .../generated/client/structure/renamed-operation/tspconfig.yaml  | 1 +
 .../client/structure/two-operation-group/tspconfig.yaml          | 1 +
 .../test/azureIntegration/generated/encode/bytes/tspconfig.yaml  | 1 +
 .../test/azureIntegration/generated/overload/tspconfig.yaml      | 1 +
 .../azureIntegration/generated/parameters/basic/tspconfig.yaml   | 1 +
 .../generated/parameters/body-optionality/tspconfig.yaml         | 1 +
 .../generated/parameters/collection-format/tspconfig.yaml        | 1 +
 .../azureIntegration/generated/parameters/spread/tspconfig.yaml  | 1 +
 .../generated/payload/content-negotiation/tspconfig.yaml         | 1 +
 .../azureIntegration/generated/payload/media-type/tspconfig.yaml | 1 +
 .../azureIntegration/generated/payload/multipart/tspconfig.yaml  | 1 +
 .../azureIntegration/generated/payload/pageable/tspconfig.yaml   | 1 +
 .../generated/resiliency/srv-driven-main/tspconfig.yaml          | 1 +
 .../generated/resiliency/srv-driven-old/tspconfig.yaml           | 1 +
 .../test/azureIntegration/generated/routes/tspconfig.yaml        | 1 +
 .../generated/serialization/encoded-name/json/tspconfig.yaml     | 1 +
 .../generated/server/endpoint/not-defined/tspconfig.yaml         | 1 +
 .../generated/server/path/multiple/tspconfig.yaml                | 1 +
 .../azureIntegration/generated/server/path/single/tspconfig.yaml | 1 +
 .../generated/server/versions/not-versioned/tspconfig.yaml       | 1 +
 .../generated/server/versions/versioned/tspconfig.yaml           | 1 +
 .../test/azureIntegration/generated/shared-route/tspconfig.yaml  | 1 +
 .../generated/special-headers/repeatability/tspconfig.yaml       | 1 +
 .../test/azureIntegration/generated/special-words/tspconfig.yaml | 1 +
 .../test/azureIntegration/generated/type/array/tspconfig.yaml    | 1 +
 .../azureIntegration/generated/type/dictionary/tspconfig.yaml    | 1 +
 .../generated/type/enum/extensible/tspconfig.yaml                | 1 +
 .../azureIntegration/generated/type/enum/fixed/tspconfig.yaml    | 1 +
 .../azureIntegration/generated/type/model/empty/tspconfig.yaml   | 1 +
 .../type/model/inheritance/enum-discriminator/tspconfig.yaml     | 1 +
 .../type/model/inheritance/nested-discriminator/tspconfig.yaml   | 1 +
 .../type/model/inheritance/not-discriminated/tspconfig.yaml      | 1 +
 .../generated/type/model/inheritance/recursive/tspconfig.yaml    | 1 +
 .../type/model/inheritance/single-discriminator/tspconfig.yaml   | 1 +
 .../generated/type/model/visibility/tspconfig.yaml               | 1 +
 .../generated/type/property/additional-properties/tspconfig.yaml | 1 +
 .../generated/type/property/nullable/tspconfig.yaml              | 1 +
 .../generated/type/property/optionality/tspconfig.yaml           | 1 +
 .../generated/type/property/value-types/tspconfig.yaml           | 1 +
 .../test/azureIntegration/generated/type/scalar/tspconfig.yaml   | 1 +
 .../test/azureIntegration/generated/type/union/tspconfig.yaml    | 1 +
 .../test/azureIntegration/generated/union-body/tspconfig.yaml    | 1 +
 .../azureIntegration/generated/versioning/added/tspconfig.yaml   | 1 +
 .../generated/versioning/madeOptional/tspconfig.yaml             | 1 +
 .../azureIntegration/generated/versioning/removed/tspconfig.yaml | 1 +
 .../generated/versioning/renamedFrom/tspconfig.yaml              | 1 +
 .../generated/versioning/returnTypeChangedFrom/tspconfig.yaml    | 1 +
 .../generated/versioning/typeChangedFrom/tspconfig.yaml          | 1 +
 71 files changed, 71 insertions(+)

diff --git a/packages/typespec-ts/test/azureIntegration/generated/authentication/api-key/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/authentication/api-key/tspconfig.yaml
index 40ff4aa7df..ff6a9ea4fe 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/authentication/api-key/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/authentication/api-key/tspconfig.yaml
@@ -6,6 +6,7 @@ options:
     flavor: azure
     azure-sdk-for-js: false
     is-typespec-test: true
+    is-modular-library: false
     title: AuthApiKeyClient
     package-details:
       name: "@msinternal/auth-apikey"
diff --git a/packages/typespec-ts/test/azureIntegration/generated/authentication/http/custom/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/authentication/http/custom/tspconfig.yaml
index 5350103d47..5407c7036e 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/authentication/http/custom/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/authentication/http/custom/tspconfig.yaml
@@ -6,6 +6,7 @@ options:
     flavor: azure
     azure-sdk-for-js: false
     is-typespec-test: true
+    is-modular-library: false
     title: AuthHttpCustomClient
     package-details:
       name: "@msinternal/auth-httpcustom"
diff --git a/packages/typespec-ts/test/azureIntegration/generated/authentication/oauth2/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/authentication/oauth2/tspconfig.yaml
index 01685f5fe7..22e9ef5f10 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/authentication/oauth2/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/authentication/oauth2/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     flavor: azure
     azure-sdk-for-js: false
     is-typespec-test: true
+    is-modular-library: false
     title: AuthOauth2Client
     package-details:
       name: "@msinternal/auth-oauth2"
diff --git a/packages/typespec-ts/test/azureIntegration/generated/authentication/union/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/authentication/union/tspconfig.yaml
index 53151846ae..81c42a901b 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/authentication/union/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/authentication/union/tspconfig.yaml
@@ -7,6 +7,7 @@ options:
     generate-test: true
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     title: AuthUnionClient
     package-details:
diff --git a/packages/typespec-ts/test/azureIntegration/generated/azure/client-generator-core/access/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/azure/client-generator-core/access/tspconfig.yaml
index c431a367a3..9be55a091a 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/azure/client-generator-core/access/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/azure/client-generator-core/access/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     generate-sample: true
     package-details:
diff --git a/packages/typespec-ts/test/azureIntegration/generated/azure/client-generator-core/client-initialization/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/azure/client-generator-core/client-initialization/tspconfig.yaml
index 68efa8e845..d9bbe3148a 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/azure/client-generator-core/client-initialization/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/azure/client-generator-core/client-initialization/tspconfig.yaml
@@ -5,6 +5,7 @@ options:
     emitter-output-dir: "{project-root}"
     add-credentials: false
     azure-sdk-for-js: false
+    is-modular-library: false
     package-details:
       name: "@azure/client-generator-core-initialization"
       version: "1.0.0"
diff --git a/packages/typespec-ts/test/azureIntegration/generated/azure/client-generator-core/client-location/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/azure/client-generator-core/client-location/tspconfig.yaml
index 2d129533d2..dc081f3d28 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/azure/client-generator-core/client-location/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/azure/client-generator-core/client-location/tspconfig.yaml
@@ -5,6 +5,7 @@ options:
     emitter-output-dir: "{project-root}"
     add-credentials: false
     azure-sdk-for-js: false
+    is-modular-library: false
     package-details:
       name: "@azure/client-generator-core-location"
       version: "1.0.0"
diff --git a/packages/typespec-ts/test/azureIntegration/generated/azure/client-generator-core/deserialize-empty-string-as-null/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/azure/client-generator-core/deserialize-empty-string-as-null/tspconfig.yaml
index d1a784ea46..f67ee5cc54 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/azure/client-generator-core/deserialize-empty-string-as-null/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/azure/client-generator-core/deserialize-empty-string-as-null/tspconfig.yaml
@@ -5,6 +5,7 @@ options:
     emitter-output-dir: "{project-root}"
     add-credentials: false
     azure-sdk-for-js: false
+    is-modular-library: false
     package-details:
       name: "@azure/client-generator-core-deserialize-empty-string-as-null"
       version: "1.0.0"
diff --git a/packages/typespec-ts/test/azureIntegration/generated/azure/client-generator-core/flatten-property/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/azure/client-generator-core/flatten-property/tspconfig.yaml
index a6f2a162a7..675f034853 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/azure/client-generator-core/flatten-property/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/azure/client-generator-core/flatten-property/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     package-details:
       name: "@msinternal/flatten-property"
diff --git a/packages/typespec-ts/test/azureIntegration/generated/azure/client-generator-core/usage/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/azure/client-generator-core/usage/tspconfig.yaml
index d72c3652d0..859bf7a6f5 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/azure/client-generator-core/usage/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/azure/client-generator-core/usage/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     generate-sample: true
     package-details:
diff --git a/packages/typespec-ts/test/azureIntegration/generated/azure/core/basic/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/azure/core/basic/tspconfig.yaml
index df8751ecf2..7c17abfe3a 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/azure/core/basic/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/azure/core/basic/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     generate-sample: true
     title: AzureCoreClient
diff --git a/packages/typespec-ts/test/azureIntegration/generated/azure/core/lro/rpc/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/azure/core/lro/rpc/tspconfig.yaml
index a835ab6c75..1acfa0d935 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/azure/core/lro/rpc/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/azure/core/lro/rpc/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     package-details:
       name: "@msinternal/lro-rpc"
diff --git a/packages/typespec-ts/test/azureIntegration/generated/azure/core/lro/standard/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/azure/core/lro/standard/tspconfig.yaml
index 3a16f56326..4c70fdd332 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/azure/core/lro/standard/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/azure/core/lro/standard/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     package-details:
       name: "@msinternal/lro-core"
diff --git a/packages/typespec-ts/test/azureIntegration/generated/azure/core/model/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/azure/core/model/tspconfig.yaml
index 657cf0c057..68ed6a6f75 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/azure/core/model/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/azure/core/model/tspconfig.yaml
@@ -7,6 +7,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     title: AzureCoreModelClient
     package-details:
diff --git a/packages/typespec-ts/test/azureIntegration/generated/azure/core/page/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/azure/core/page/tspconfig.yaml
index ba95b58035..5c5e2043c6 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/azure/core/page/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/azure/core/page/tspconfig.yaml
@@ -7,6 +7,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     title: AzureCorePageClient
     package-details:
diff --git a/packages/typespec-ts/test/azureIntegration/generated/azure/core/scalar/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/azure/core/scalar/tspconfig.yaml
index 29be0995f8..db5650c555 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/azure/core/scalar/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/azure/core/scalar/tspconfig.yaml
@@ -7,6 +7,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     title: AzureCoreScalarClient
     package-details:
diff --git a/packages/typespec-ts/test/azureIntegration/generated/azure/core/traits/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/azure/core/traits/tspconfig.yaml
index f8c43459c6..6dfbb6539b 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/azure/core/traits/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/azure/core/traits/tspconfig.yaml
@@ -7,6 +7,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     title: AzureCoreTraitsClient
     package-details:
diff --git a/packages/typespec-ts/test/azureIntegration/generated/azure/special-headers/client-request-id/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/azure/special-headers/client-request-id/tspconfig.yaml
index e9ca46d19b..3704d5e019 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/azure/special-headers/client-request-id/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/azure/special-headers/client-request-id/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     package-details:
       name: "@msinternal/media-types"
diff --git a/packages/typespec-ts/test/azureIntegration/generated/client/namespace/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/client/namespace/tspconfig.yaml
index 3339d405dd..f716db776c 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/client/namespace/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/client/namespace/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     package-details:
       name: "@msinternal/client-namespace"
diff --git a/packages/typespec-ts/test/azureIntegration/generated/client/naming/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/client/naming/tspconfig.yaml
index bf36545a6e..d850549a8c 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/client/naming/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/client/naming/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     package-details:
       name: "@msinternal/client-naming"
diff --git a/packages/typespec-ts/test/azureIntegration/generated/client/structure/client-operation-group/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/client/structure/client-operation-group/tspconfig.yaml
index 6113c72e99..1868f280e9 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/client/structure/client-operation-group/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/client/structure/client-operation-group/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     package-details:
       name: "@msinternal/client-operation-group"
diff --git a/packages/typespec-ts/test/azureIntegration/generated/client/structure/default/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/client/structure/default/tspconfig.yaml
index 8506dedfb9..fd7743f5b7 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/client/structure/default/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/client/structure/default/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     package-details:
       name: "@msinternal/client-structure-default"
diff --git a/packages/typespec-ts/test/azureIntegration/generated/client/structure/multi-client/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/client/structure/multi-client/tspconfig.yaml
index f2b0bc4fd3..f5d23fe994 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/client/structure/multi-client/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/client/structure/multi-client/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     package-details:
       name: "@msinternal/client-structure-multiclient"
diff --git a/packages/typespec-ts/test/azureIntegration/generated/client/structure/renamed-operation/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/client/structure/renamed-operation/tspconfig.yaml
index 8b92fd5a49..675b89023d 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/client/structure/renamed-operation/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/client/structure/renamed-operation/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     package-details:
       name: "@msinternal/client-structure-renamed"
diff --git a/packages/typespec-ts/test/azureIntegration/generated/client/structure/two-operation-group/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/client/structure/two-operation-group/tspconfig.yaml
index d3584f94f3..a9901584f0 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/client/structure/two-operation-group/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/client/structure/two-operation-group/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     package-details:
       name: "@msinternal/client-structure-twoopgroup"
diff --git a/packages/typespec-ts/test/azureIntegration/generated/encode/bytes/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/encode/bytes/tspconfig.yaml
index ae31d01080..c76abc1ac2 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/encode/bytes/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/encode/bytes/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     enable-operation-group: true
     package-details:
diff --git a/packages/typespec-ts/test/azureIntegration/generated/overload/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/overload/tspconfig.yaml
index 598b04a51e..b070e57ddc 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/overload/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/overload/tspconfig.yaml
@@ -8,5 +8,6 @@ options:
     flavor: azure
     azure-sdk-for-js: false
     is-typespec-test: true
+    is-modular-library: false
     package-details:
       name: "@msinternal/media-types"
diff --git a/packages/typespec-ts/test/azureIntegration/generated/parameters/basic/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/parameters/basic/tspconfig.yaml
index 18601b0fa7..3cde5ddb54 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/parameters/basic/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/parameters/basic/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     enable-operation-group: true
     is-typespec-test: true
     package-details:
diff --git a/packages/typespec-ts/test/azureIntegration/generated/parameters/body-optionality/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/parameters/body-optionality/tspconfig.yaml
index dc73e1c060..37be3825f2 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/parameters/body-optionality/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/parameters/body-optionality/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     enable-operation-group: true
     is-typespec-test: true
     package-details:
diff --git a/packages/typespec-ts/test/azureIntegration/generated/parameters/collection-format/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/parameters/collection-format/tspconfig.yaml
index a2bf4ddcc4..e0533800dc 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/parameters/collection-format/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/parameters/collection-format/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     enable-operation-group: true
     compatibility-query-multi-format: true
     is-typespec-test: true
diff --git a/packages/typespec-ts/test/azureIntegration/generated/parameters/spread/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/parameters/spread/tspconfig.yaml
index 727597b6ad..74d884424e 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/parameters/spread/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/parameters/spread/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     enable-operation-group: true
     is-typespec-test: true
     package-details:
diff --git a/packages/typespec-ts/test/azureIntegration/generated/payload/content-negotiation/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/payload/content-negotiation/tspconfig.yaml
index 06fbbc819c..ed7d0c38dc 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/payload/content-negotiation/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/payload/content-negotiation/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     enable-operation-group: true
     package-details:
diff --git a/packages/typespec-ts/test/azureIntegration/generated/payload/media-type/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/payload/media-type/tspconfig.yaml
index 3a20e38b4e..460beb75f5 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/payload/media-type/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/payload/media-type/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     enable-operation-group: true
     package-details:
diff --git a/packages/typespec-ts/test/azureIntegration/generated/payload/multipart/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/payload/multipart/tspconfig.yaml
index a4ef1edb97..a6ad8a79cb 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/payload/multipart/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/payload/multipart/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     enable-operation-group: true
     package-details:
diff --git a/packages/typespec-ts/test/azureIntegration/generated/payload/pageable/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/payload/pageable/tspconfig.yaml
index 90b8f04a43..d9d2194c7e 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/payload/pageable/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/payload/pageable/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     "enable-operation-group": true
     package-details:
diff --git a/packages/typespec-ts/test/azureIntegration/generated/resiliency/srv-driven-main/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/resiliency/srv-driven-main/tspconfig.yaml
index e00563a876..93d144bdc7 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/resiliency/srv-driven-main/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/resiliency/srv-driven-main/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     title: ServiceDrivenNewClient
     package-details:
diff --git a/packages/typespec-ts/test/azureIntegration/generated/resiliency/srv-driven-old/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/resiliency/srv-driven-old/tspconfig.yaml
index b2cb143919..92b9db4a6e 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/resiliency/srv-driven-old/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/resiliency/srv-driven-old/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     title: ServiceDrivenOldClient
     package-details:
diff --git a/packages/typespec-ts/test/azureIntegration/generated/routes/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/routes/tspconfig.yaml
index 1fcf27ef57..5447402c71 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/routes/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/routes/tspconfig.yaml
@@ -7,6 +7,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     title: RoutesClient
     package-details:
diff --git a/packages/typespec-ts/test/azureIntegration/generated/serialization/encoded-name/json/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/serialization/encoded-name/json/tspconfig.yaml
index 1cd5aef480..8e6e2672b5 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/serialization/encoded-name/json/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/serialization/encoded-name/json/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     title: SerializationEncodedNameJsonClient
     enable-operation-group: true
diff --git a/packages/typespec-ts/test/azureIntegration/generated/server/endpoint/not-defined/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/server/endpoint/not-defined/tspconfig.yaml
index a038f52c27..f13a28a5da 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/server/endpoint/not-defined/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/server/endpoint/not-defined/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     title: NotDefinedParamInServerEndpointClient
     package-details:
diff --git a/packages/typespec-ts/test/azureIntegration/generated/server/path/multiple/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/server/path/multiple/tspconfig.yaml
index 852062770d..aed5f47477 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/server/path/multiple/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/server/path/multiple/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     title: MultipleParamInServerPathClient
     package-details:
diff --git a/packages/typespec-ts/test/azureIntegration/generated/server/path/single/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/server/path/single/tspconfig.yaml
index 329db635ea..8a27d22dd5 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/server/path/single/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/server/path/single/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     title: SingleParamInServerPathClient
     package-details:
diff --git a/packages/typespec-ts/test/azureIntegration/generated/server/versions/not-versioned/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/server/versions/not-versioned/tspconfig.yaml
index 8b7aa284a1..309cef07a9 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/server/versions/not-versioned/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/server/versions/not-versioned/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     title: NotVersionedParamInServerVersionsClient
     package-details:
diff --git a/packages/typespec-ts/test/azureIntegration/generated/server/versions/versioned/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/server/versions/versioned/tspconfig.yaml
index c9b077df32..f3d6a000af 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/server/versions/versioned/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/server/versions/versioned/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     title: VersionedParamInServerVersionsClient
     package-details:
diff --git a/packages/typespec-ts/test/azureIntegration/generated/shared-route/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/shared-route/tspconfig.yaml
index 598b04a51e..84dfb03fbf 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/shared-route/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/shared-route/tspconfig.yaml
@@ -7,6 +7,7 @@ options:
     generate-test: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     package-details:
       name: "@msinternal/media-types"
diff --git a/packages/typespec-ts/test/azureIntegration/generated/special-headers/repeatability/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/special-headers/repeatability/tspconfig.yaml
index 8001ce939d..f7a601509a 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/special-headers/repeatability/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/special-headers/repeatability/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     package-details:
       name: "@msinternal/client-request-id"
diff --git a/packages/typespec-ts/test/azureIntegration/generated/special-words/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/special-words/tspconfig.yaml
index d0495977aa..fbeae7e4dd 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/special-words/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/special-words/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     enable-operation-group: true
     title: SpecialWordsClient
diff --git a/packages/typespec-ts/test/azureIntegration/generated/type/array/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/type/array/tspconfig.yaml
index b6ebf63ed4..f0bb455556 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/type/array/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/type/array/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     generate-sample: true
     title: ArrayItemTypesClient
diff --git a/packages/typespec-ts/test/azureIntegration/generated/type/dictionary/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/type/dictionary/tspconfig.yaml
index 2cfd8e64a9..39c09c08fd 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/type/dictionary/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/type/dictionary/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     generate-sample: true
     title: DictClient
diff --git a/packages/typespec-ts/test/azureIntegration/generated/type/enum/extensible/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/type/enum/extensible/tspconfig.yaml
index b89ead32a2..55b9ba7c55 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/type/enum/extensible/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/type/enum/extensible/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     package-details:
       name: "@msinternal/extensible-enums"
diff --git a/packages/typespec-ts/test/azureIntegration/generated/type/enum/fixed/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/type/enum/fixed/tspconfig.yaml
index 6952448b8c..3117ca5c35 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/type/enum/fixed/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/type/enum/fixed/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     package-details:
       name: "@msinternal/extensible-fixed"
diff --git a/packages/typespec-ts/test/azureIntegration/generated/type/model/empty/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/type/model/empty/tspconfig.yaml
index f189779d5e..dde593a28e 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/type/model/empty/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/type/model/empty/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     package-details:
       name: "@msinternal/empty-model"
diff --git a/packages/typespec-ts/test/azureIntegration/generated/type/model/inheritance/enum-discriminator/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/type/model/inheritance/enum-discriminator/tspconfig.yaml
index b7c5f172fa..9032e0bf99 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/type/model/inheritance/enum-discriminator/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/type/model/inheritance/enum-discriminator/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     package-details:
       name: "@msinternal/model-inheritance-enum-discriminator"
diff --git a/packages/typespec-ts/test/azureIntegration/generated/type/model/inheritance/nested-discriminator/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/type/model/inheritance/nested-discriminator/tspconfig.yaml
index 86a569b5b6..3924081813 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/type/model/inheritance/nested-discriminator/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/type/model/inheritance/nested-discriminator/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     package-details:
       name: "@msinternal/model-inheritance"
diff --git a/packages/typespec-ts/test/azureIntegration/generated/type/model/inheritance/not-discriminated/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/type/model/inheritance/not-discriminated/tspconfig.yaml
index 9255f34c85..ef10b5cf46 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/type/model/inheritance/not-discriminated/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/type/model/inheritance/not-discriminated/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     package-details:
       name: "@msinternal/model-inheritance-not-discriminated"
diff --git a/packages/typespec-ts/test/azureIntegration/generated/type/model/inheritance/recursive/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/type/model/inheritance/recursive/tspconfig.yaml
index d3a25ceae7..4c00cea115 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/type/model/inheritance/recursive/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/type/model/inheritance/recursive/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     package-details:
       name: "@msinternal/inheritance-recursive"
diff --git a/packages/typespec-ts/test/azureIntegration/generated/type/model/inheritance/single-discriminator/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/type/model/inheritance/single-discriminator/tspconfig.yaml
index 401c165a43..badd2f2155 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/type/model/inheritance/single-discriminator/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/type/model/inheritance/single-discriminator/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     package-details:
       name: "@msinternal/model-inheritance-single-discriminator"
diff --git a/packages/typespec-ts/test/azureIntegration/generated/type/model/visibility/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/type/model/visibility/tspconfig.yaml
index 7e4c146a62..fe58008fb9 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/type/model/visibility/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/type/model/visibility/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     package-details:
       name: "@msinternal/visibility"
diff --git a/packages/typespec-ts/test/azureIntegration/generated/type/property/additional-properties/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/type/property/additional-properties/tspconfig.yaml
index db7ed9e886..1144fbb6a3 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/type/property/additional-properties/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/type/property/additional-properties/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     enable-operation-group: true
     package-details:
diff --git a/packages/typespec-ts/test/azureIntegration/generated/type/property/nullable/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/type/property/nullable/tspconfig.yaml
index aee59ef6b7..11acd007bd 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/type/property/nullable/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/type/property/nullable/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     enable-operation-group: true
     package-details:
diff --git a/packages/typespec-ts/test/azureIntegration/generated/type/property/optionality/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/type/property/optionality/tspconfig.yaml
index 006518f0c0..d768fb9e28 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/type/property/optionality/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/type/property/optionality/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     enable-operation-group: true
     package-details:
diff --git a/packages/typespec-ts/test/azureIntegration/generated/type/property/value-types/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/type/property/value-types/tspconfig.yaml
index f669170c04..6efa496fd9 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/type/property/value-types/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/type/property/value-types/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     enable-operation-group: true
     package-details:
diff --git a/packages/typespec-ts/test/azureIntegration/generated/type/scalar/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/type/scalar/tspconfig.yaml
index 11aa264039..98957c1b24 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/type/scalar/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/type/scalar/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     enable-operation-group: true
     package-details:
diff --git a/packages/typespec-ts/test/azureIntegration/generated/type/union/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/type/union/tspconfig.yaml
index fa9eb9b0bf..2031081e55 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/type/union/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/type/union/tspconfig.yaml
@@ -7,6 +7,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     generate-sample: true
     title: UnionsClient
diff --git a/packages/typespec-ts/test/azureIntegration/generated/union-body/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/union-body/tspconfig.yaml
index a4bf80e3c3..2357218130 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/union-body/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/union-body/tspconfig.yaml
@@ -7,6 +7,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     generate-sample: true
     title: UnionBodyClient
diff --git a/packages/typespec-ts/test/azureIntegration/generated/versioning/added/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/versioning/added/tspconfig.yaml
index c936f0e673..dae95dab97 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/versioning/added/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/versioning/added/tspconfig.yaml
@@ -7,6 +7,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     generate-sample: true
     title: VersioningAddedClient
diff --git a/packages/typespec-ts/test/azureIntegration/generated/versioning/madeOptional/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/versioning/madeOptional/tspconfig.yaml
index 6fcc9f345c..2249be8de1 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/versioning/madeOptional/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/versioning/madeOptional/tspconfig.yaml
@@ -7,6 +7,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     generate-sample: true
     title: VersioningMadeOptionalClient
diff --git a/packages/typespec-ts/test/azureIntegration/generated/versioning/removed/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/versioning/removed/tspconfig.yaml
index 66332e48f6..4d3c92637b 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/versioning/removed/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/versioning/removed/tspconfig.yaml
@@ -6,6 +6,7 @@ options:
     generate-test: false
     add-credentials: false
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     generate-sample: true
     title: VersioningRemovedClient
diff --git a/packages/typespec-ts/test/azureIntegration/generated/versioning/renamedFrom/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/versioning/renamedFrom/tspconfig.yaml
index 28a9b48c3a..bf00561efd 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/versioning/renamedFrom/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/versioning/renamedFrom/tspconfig.yaml
@@ -7,6 +7,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     generate-sample: true
     title: VersioningRenamedFromClient
diff --git a/packages/typespec-ts/test/azureIntegration/generated/versioning/returnTypeChangedFrom/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/versioning/returnTypeChangedFrom/tspconfig.yaml
index 0d3e52abd7..6632dec49e 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/versioning/returnTypeChangedFrom/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/versioning/returnTypeChangedFrom/tspconfig.yaml
@@ -7,6 +7,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     generate-sample: true
     title: VersioningReturnTypeChangedFromClient
diff --git a/packages/typespec-ts/test/azureIntegration/generated/versioning/typeChangedFrom/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/versioning/typeChangedFrom/tspconfig.yaml
index 534021bfd8..72fed95dde 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/versioning/typeChangedFrom/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/versioning/typeChangedFrom/tspconfig.yaml
@@ -7,6 +7,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     generate-sample: true
     title: VersioningTypeChangedFromClient

From 682b995a00aaf77b3a4c1bdea632f8b887c355af Mon Sep 17 00:00:00 2001
From: "Jiao Di (MSFT)" <80496810+v-jiaodi@users.noreply.github.com>
Date: Wed, 9 Jul 2025 16:33:28 +0800
Subject: [PATCH 4/6] update

---
 packages/typespec-test/test/authoring/tspconfig.yaml             | 1 +
 packages/typespec-test/test/confidentialLedger/tspconfig.yaml    | 1 +
 .../test/healthInsights_trialmatcher/tspconfig.yaml              | 1 +
 packages/typespec-test/test/loadTest/tspconfig.yaml              | 1 +
 packages/typespec-test/test/openai/tspconfig.yaml                | 1 +
 packages/typespec-test/test/translator/tspconfig.yaml            | 1 +
 .../azureIntegration/generated/encode/datetime/tspconfig.yaml    | 1 +
 7 files changed, 7 insertions(+)

diff --git a/packages/typespec-test/test/authoring/tspconfig.yaml b/packages/typespec-test/test/authoring/tspconfig.yaml
index 71fc498a84..977d9a5a8d 100644
--- a/packages/typespec-test/test/authoring/tspconfig.yaml
+++ b/packages/typespec-test/test/authoring/tspconfig.yaml
@@ -6,6 +6,7 @@ options:
     emitter-output-dir: "{project-root}/generated/openapi"
   "@azure-tools/typespec-ts":
     azure-sdk-for-js: false
+    is-modular-library: false
     generate-sample: true
     emitter-output-dir: "{project-root}/generated/typespec-ts"
     package-details:
diff --git a/packages/typespec-test/test/confidentialLedger/tspconfig.yaml b/packages/typespec-test/test/confidentialLedger/tspconfig.yaml
index 421aed844a..d94f5f28d5 100644
--- a/packages/typespec-test/test/confidentialLedger/tspconfig.yaml
+++ b/packages/typespec-test/test/confidentialLedger/tspconfig.yaml
@@ -4,6 +4,7 @@ emit:
 options:
   "@azure-tools/typespec-ts":
     azure-sdk-for-js: false
+    is-modular-library: false
     generate-metadata: true
     generate-test: false
     emitter-output-dir: "{project-root}/generated/typespec-ts"
diff --git a/packages/typespec-test/test/healthInsights_trialmatcher/tspconfig.yaml b/packages/typespec-test/test/healthInsights_trialmatcher/tspconfig.yaml
index 0ab1076b92..334fa65aa4 100644
--- a/packages/typespec-test/test/healthInsights_trialmatcher/tspconfig.yaml
+++ b/packages/typespec-test/test/healthInsights_trialmatcher/tspconfig.yaml
@@ -25,6 +25,7 @@ options:
     generate-test: true
     generate-sample: true
     azure-sdk-for-js: false
+    is-modular-library: false
     emitter-output-dir: "{project-root}/generated/typespec-ts"
     package-details:
       name: "@azure-rest/health-insights-clinicalmatching"
diff --git a/packages/typespec-test/test/loadTest/tspconfig.yaml b/packages/typespec-test/test/loadTest/tspconfig.yaml
index a36604a930..5c756d4c3d 100644
--- a/packages/typespec-test/test/loadTest/tspconfig.yaml
+++ b/packages/typespec-test/test/loadTest/tspconfig.yaml
@@ -24,6 +24,7 @@ options:
     generate-test: true
     generate-sample: true
     azure-sdk-for-js: false
+    is-modular-library: false
     enable-operation-group: true
     package-details:
       name: "@azure-rest/load-testing"
diff --git a/packages/typespec-test/test/openai/tspconfig.yaml b/packages/typespec-test/test/openai/tspconfig.yaml
index 5c794e38bb..6099929689 100644
--- a/packages/typespec-test/test/openai/tspconfig.yaml
+++ b/packages/typespec-test/test/openai/tspconfig.yaml
@@ -7,6 +7,7 @@ options:
     generate-test: true
     generate-sample: true
     azure-sdk-for-js: false
+    is-modular-library: false
     emitter-output-dir: "{project-root}/generated/typespec-ts"
     package-details:
       name: "@msinternal/openai"
diff --git a/packages/typespec-test/test/translator/tspconfig.yaml b/packages/typespec-test/test/translator/tspconfig.yaml
index db122c3ba6..ee53f78fea 100644
--- a/packages/typespec-test/test/translator/tspconfig.yaml
+++ b/packages/typespec-test/test/translator/tspconfig.yaml
@@ -6,6 +6,7 @@ options:
     generate-metadata: true
     generate-test: true
     azure-sdk-for-js: false
+    is-modular-library: false
     compatibility-query-multi-format: true
     package-details:
       name: "@azure-rest/cognitiveservices-translator"
diff --git a/packages/typespec-ts/test/azureIntegration/generated/encode/datetime/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/encode/datetime/tspconfig.yaml
index 7ad23ecd3d..b7178518df 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/encode/datetime/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/encode/datetime/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     enable-operation-group: true
     package-details:

From 57be1eb5d50c0d6382a60fc3463d6c9bcdac0940 Mon Sep 17 00:00:00 2001
From: "Jiao Di (MSFT)" <80496810+v-jiaodi@users.noreply.github.com>
Date: Wed, 9 Jul 2025 17:03:35 +0800
Subject: [PATCH 5/6] update

---
 .../azureIntegration/generated/encode/duration/tspconfig.yaml    | 1 +
 .../azureIntegration/generated/encode/numeric/tspconfig.yaml     | 1 +
 2 files changed, 2 insertions(+)

diff --git a/packages/typespec-ts/test/azureIntegration/generated/encode/duration/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/encode/duration/tspconfig.yaml
index d0730189bf..c2e8383372 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/encode/duration/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/encode/duration/tspconfig.yaml
@@ -7,6 +7,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     enable-operation-group: true
     package-details:
diff --git a/packages/typespec-ts/test/azureIntegration/generated/encode/numeric/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/encode/numeric/tspconfig.yaml
index ce848cab24..de291fdf47 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/encode/numeric/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/encode/numeric/tspconfig.yaml
@@ -7,6 +7,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     enable-operation-group: true
     package-details:

From 456cfd292c85e8d3a63b1cb96e5d14ea3787ac05 Mon Sep 17 00:00:00 2001
From: "Jiao Di (MSFT)" <80496810+v-jiaodi@users.noreply.github.com>
Date: Wed, 9 Jul 2025 17:29:52 +0800
Subject: [PATCH 6/6] update

---
 .../test/azureIntegration/generated/media-types/tspconfig.yaml   | 1 +
 1 file changed, 1 insertion(+)

diff --git a/packages/typespec-ts/test/azureIntegration/generated/media-types/tspconfig.yaml b/packages/typespec-ts/test/azureIntegration/generated/media-types/tspconfig.yaml
index c5fb7f3e91..02a077f743 100644
--- a/packages/typespec-ts/test/azureIntegration/generated/media-types/tspconfig.yaml
+++ b/packages/typespec-ts/test/azureIntegration/generated/media-types/tspconfig.yaml
@@ -8,6 +8,7 @@ options:
     add-credentials: false
     flavor: azure
     azure-sdk-for-js: false
+    is-modular-library: false
     is-typespec-test: true
     title: MediaTypesClient
     package-details: