diff --git a/specification/ai/Azure.AI.Agents/tspconfig.yaml b/specification/ai/Azure.AI.Agents/tspconfig.yaml
index 2a947e04ed1a..fd27206b7475 100644
--- a/specification/ai/Azure.AI.Agents/tspconfig.yaml
+++ b/specification/ai/Azure.AI.Agents/tspconfig.yaml
@@ -35,10 +35,11 @@ options:
     model-namespace: false
     api-version: "2025-05-15-preview"
   "@azure-tools/typespec-ts":
+    package-dir: "ai-agents"
     api-version: "v1"
-    generateTest: true
-    generateMetadata: false
-    packageDetails:
+    generate-test: true
+    generate-metadata: false
+    package-details:
       name: "@azure/ai-agents"
     flavor: azure
 linter:
diff --git a/specification/ai/DocumentIntelligence/tspconfig.yaml b/specification/ai/DocumentIntelligence/tspconfig.yaml
index 7e8a6bfa2480..e4f7893743b1 100644
--- a/specification/ai/DocumentIntelligence/tspconfig.yaml
+++ b/specification/ai/DocumentIntelligence/tspconfig.yaml
@@ -55,6 +55,7 @@ options:
   "@azure-tools/typespec-ts":
     title: DocumentIntelligence
     package-dir: "ai-document-intelligence-rest"
+    is-modular-library: false
     generate-metadata: true
     package-details:
       name: "@azure-rest/ai-document-intelligence"
diff --git a/specification/ai/Face/tspconfig.yaml b/specification/ai/Face/tspconfig.yaml
index ad848f823699..c4e495d4f940 100644
--- a/specification/ai/Face/tspconfig.yaml
+++ b/specification/ai/Face/tspconfig.yaml
@@ -32,6 +32,7 @@ options:
   "@azure-tools/typespec-ts":
     package-dir: "ai-vision-face-rest"
     generate-metadata: true
+    is-modular-library: false
     flavor: azure
     package-details:
       name: "@azure-rest/ai-vision-face"
diff --git a/specification/ai/HealthInsights/HealthInsights.RadiologyInsights/tspconfig.yaml b/specification/ai/HealthInsights/HealthInsights.RadiologyInsights/tspconfig.yaml
index 040385536712..f62f73e90577 100644
--- a/specification/ai/HealthInsights/HealthInsights.RadiologyInsights/tspconfig.yaml
+++ b/specification/ai/HealthInsights/HealthInsights.RadiologyInsights/tspconfig.yaml
@@ -58,6 +58,7 @@ options:
     package-dir: "health-insights-radiologyinsights-rest"
     emitter-output-dir: "{js-sdk-folder}/sdk/{service-directory-name}/health-insights-cancerprofiling-rest"
     generate-metadata: true
+    is-modular-library: false
     package-details:
       name: "@azure-rest/health-insights-radiologyinsights"
     flavor: azure
diff --git a/specification/ai/ImageAnalysis/tspconfig.yaml b/specification/ai/ImageAnalysis/tspconfig.yaml
index 927167d792d6..bcc6f458c07b 100644
--- a/specification/ai/ImageAnalysis/tspconfig.yaml
+++ b/specification/ai/ImageAnalysis/tspconfig.yaml
@@ -38,6 +38,7 @@ options:
     flavor: azure
   "@azure-tools/typespec-ts":
     package-dir: "ai-vision-image-analysis-rest"
+    is-modular-library: false
     package-details:
       name: "@azure-rest/ai-vision-image-analysis"
     flavor: azure
diff --git a/specification/apicenter/ApiCenter.DataApi/tspconfig.yaml b/specification/apicenter/ApiCenter.DataApi/tspconfig.yaml
index 3a437cf5de1e..c9ae534b80b3 100644
--- a/specification/apicenter/ApiCenter.DataApi/tspconfig.yaml
+++ b/specification/apicenter/ApiCenter.DataApi/tspconfig.yaml
@@ -27,6 +27,7 @@ options:
   "@azure-tools/typespec-ts":
     package-dir: "azure-apicenter-rest"
     generate-metadata: true
+    is-modular-library: false
     flavor: azure
     package-details:
       name: "@azure-rest/azure-apicenter-rest"
diff --git a/specification/appconfiguration/AppConfiguration/tspconfig.yaml b/specification/appconfiguration/AppConfiguration/tspconfig.yaml
index 72115c369b2b..d582e38162fd 100644
--- a/specification/appconfiguration/AppConfiguration/tspconfig.yaml
+++ b/specification/appconfiguration/AppConfiguration/tspconfig.yaml
@@ -31,6 +31,7 @@ options:
   "@azure-tools/typespec-ts":
     package-dir: "azure-appconfiguration-rest"
     generate-metadata: true
+    is-modular-library: false
     package-details:
       name: "@azure-rest/azure-appconfiguration"
       description: "Azure App Configuration"
diff --git a/specification/applicationinsights/ApplicationInsights.LiveMetrics/tspconfig.yaml b/specification/applicationinsights/ApplicationInsights.LiveMetrics/tspconfig.yaml
index 3848644a809a..72b1d29fd853 100644
--- a/specification/applicationinsights/ApplicationInsights.LiveMetrics/tspconfig.yaml
+++ b/specification/applicationinsights/ApplicationInsights.LiveMetrics/tspconfig.yaml
@@ -28,6 +28,7 @@ options:
   "@azure-tools/typespec-ts":
     package-dir: "livemetrics-rest"
     generate-metadata: true
+    is-modular-library: false
     package-details:
       name: "@azure-rest/livemetrics"
       description: "LiveMetrics Service"
diff --git a/specification/batch/Azure.Batch/tspconfig.yaml b/specification/batch/Azure.Batch/tspconfig.yaml
index c751266b4d36..9e779ffd0963 100644
--- a/specification/batch/Azure.Batch/tspconfig.yaml
+++ b/specification/batch/Azure.Batch/tspconfig.yaml
@@ -50,6 +50,7 @@ options:
     generate-sample: false
   "@azure-tools/typespec-ts":
     package-dir: "batch-rest"
+    is-modular-library: false
     package-details:
       name: "@azure-rest/batch"
       description: "Batch Service Rest Level Client"
diff --git a/specification/cognitiveservices/AnomalyDetector/tspconfig.yaml b/specification/cognitiveservices/AnomalyDetector/tspconfig.yaml
index 423bd8f8bd70..be73e0f02aa4 100644
--- a/specification/cognitiveservices/AnomalyDetector/tspconfig.yaml
+++ b/specification/cognitiveservices/AnomalyDetector/tspconfig.yaml
@@ -40,6 +40,7 @@ options:
   "@azure-tools/typespec-ts":
     emitter-output-dir: "{js-sdk-folder}/sdk/{service-directory-name}/ai-anomaly-detector-rest"
     generate-metadata: true
+    is-modular-library: false
     package-dir: "ai-anomaly-detector-rest"
     package-details:
       name: "@azure-rest/ai-anomaly-detector"
diff --git a/specification/cognitiveservices/ContentSafety/tspconfig.yaml b/specification/cognitiveservices/ContentSafety/tspconfig.yaml
index 06d4d8534d1b..5224245abf0c 100644
--- a/specification/cognitiveservices/ContentSafety/tspconfig.yaml
+++ b/specification/cognitiveservices/ContentSafety/tspconfig.yaml
@@ -32,6 +32,7 @@ options:
     model-namespace: false
   "@azure-tools/typespec-ts":
     package-dir: "ai-content-safety-rest"
+    is-modular-library: false
     package-details:
       name: "@azure-rest/ai-content-safety"
       version: "1.0.0"
diff --git a/specification/communication/Communication.JobRouter/tspconfig.yaml b/specification/communication/Communication.JobRouter/tspconfig.yaml
index e4a89978db93..f92d79a33e8a 100644
--- a/specification/communication/Communication.JobRouter/tspconfig.yaml
+++ b/specification/communication/Communication.JobRouter/tspconfig.yaml
@@ -60,6 +60,7 @@ options:
   "@azure-tools/typespec-ts":
     emitter-output-dir: "{js-sdk-folder}/sdk/{service-directory-name}/communication-job-router-rest"
     package-dir: "communication-job-router-rest"
+    is-modular-library: false
     package-details:
       name: "@azure-rest/communication-job-router"
       description: "Azure client library for Azure Communication Job Router services"
diff --git a/specification/communication/Communication.Messages/tspconfig.yaml b/specification/communication/Communication.Messages/tspconfig.yaml
index 916c414a50e7..46b11cd1d2c7 100644
--- a/specification/communication/Communication.Messages/tspconfig.yaml
+++ b/specification/communication/Communication.Messages/tspconfig.yaml
@@ -58,6 +58,7 @@ options:
     flavor: azure
   "@azure-tools/typespec-ts":
     package-dir: "communication-messages-rest"
+    is-modular-library: false
     package-details:
       name: "@azure-rest/communication-messages"
       description: "Azure client library for Azure Communication Messages services"
diff --git a/specification/confidentialledger/Microsoft.CodeTransparency/tspconfig.yaml b/specification/confidentialledger/Microsoft.CodeTransparency/tspconfig.yaml
index 890c5b7fd516..cc4c1a00982a 100644
--- a/specification/confidentialledger/Microsoft.CodeTransparency/tspconfig.yaml
+++ b/specification/confidentialledger/Microsoft.CodeTransparency/tspconfig.yaml
@@ -17,7 +17,6 @@ options:
     namespace: "azure.codetransparency"
     package-mode: "dataplane"
     package-pprint-name: "Code Transparency Service"
-    models-mode: none
     generate-test: true
     generate-sample: true
   "@azure-tools/typespec-csharp":
@@ -32,6 +31,7 @@ options:
   "@azure-tools/typespec-ts":
     flavor: azure
     package-dir: "codetransparency-rest"
+    is-modular-library: false
     package-details:
       name: "@azure-rest/codetransparency"
       description: "Code Transparency Service"
diff --git a/specification/devcenter/DevCenter/tspconfig.yaml b/specification/devcenter/DevCenter/tspconfig.yaml
index 98429b622047..04b31081bbf9 100644
--- a/specification/devcenter/DevCenter/tspconfig.yaml
+++ b/specification/devcenter/DevCenter/tspconfig.yaml
@@ -33,6 +33,7 @@ options:
     title: "Azure Developer DevCenter"
     package-dir: "developer-devcenter-rest"
     generate-metadata: true
+    is-modular-library: false
     package-details:
       name: "@azure-rest/developer-devcenter"
       description: "Azure Developer DevCenter Client"
diff --git a/specification/healthdataaiservices/HealthDataAIServices.DeidServices/tspconfig.yaml b/specification/healthdataaiservices/HealthDataAIServices.DeidServices/tspconfig.yaml
index 01d710ba00ba..ea5cc52a3fa9 100644
--- a/specification/healthdataaiservices/HealthDataAIServices.DeidServices/tspconfig.yaml
+++ b/specification/healthdataaiservices/HealthDataAIServices.DeidServices/tspconfig.yaml
@@ -28,9 +28,10 @@ options:
     namespace: Azure.Health.Deidentification
     model-namespace: false
   "@azure-tools/typespec-ts":
-    package-dir: "azure-health-deidentification"
+    package-dir: "health-deidentification-rest"
     title: DeidentificationClient
     generate-metadata: true
+    is-modular-library: false
     package-details:
       name: "@azure-rest/health-deidentification"
       description: "Health Deidentification Service"
diff --git a/specification/loadtestservice/LoadTestService/tspconfig.yaml b/specification/loadtestservice/LoadTestService/tspconfig.yaml
index cf69d1bb8a02..0f45f3d8d01d 100644
--- a/specification/loadtestservice/LoadTestService/tspconfig.yaml
+++ b/specification/loadtestservice/LoadTestService/tspconfig.yaml
@@ -40,6 +40,7 @@ options:
     title: Azure Load Testing
     description: Azure Load Testing Client
     generate-metadata: true
+    is-modular-library: false
     generate-test: false
     package-details:
       name: "@azure-rest/load-testing"
diff --git a/specification/loadtestservice/Playwright/tspconfig.yaml b/specification/loadtestservice/Playwright/tspconfig.yaml
index fb3513f7c642..cbf3dbb8024c 100644
--- a/specification/loadtestservice/Playwright/tspconfig.yaml
+++ b/specification/loadtestservice/Playwright/tspconfig.yaml
@@ -28,6 +28,7 @@ options:
     title: PlaywrightServiceClient
     description: Microsoft Playwright Service Client
     generate-metadata: true
+    is-modular-library: false
     generate-test: false
     package-details:
       name: "@azure-rest/playwright"
diff --git a/specification/machinelearningservices/AzureAI.Assets/tspconfig.yaml b/specification/machinelearningservices/AzureAI.Assets/tspconfig.yaml
index e731b72c83aa..c306e994007f 100644
--- a/specification/machinelearningservices/AzureAI.Assets/tspconfig.yaml
+++ b/specification/machinelearningservices/AzureAI.Assets/tspconfig.yaml
@@ -18,6 +18,7 @@ options:
     generate-sample: true
   "@azure-tools/typespec-ts":
     generate-metadata: true
+    is-modular-library: false
     package-dir: "ai-resources-autogen-rest"
     package-details:
       name: "@azure-rest/ai-resources-autogen"
diff --git a/specification/onlineexperimentation/Azure.Analytics.OnlineExperimentation/tspconfig.yaml b/specification/onlineexperimentation/Azure.Analytics.OnlineExperimentation/tspconfig.yaml
index fc8417de86f9..d2903073ae3e 100644
--- a/specification/onlineexperimentation/Azure.Analytics.OnlineExperimentation/tspconfig.yaml
+++ b/specification/onlineexperimentation/Azure.Analytics.OnlineExperimentation/tspconfig.yaml
@@ -47,6 +47,7 @@ options:
     model-namespace: false
   "@azure-tools/typespec-ts":
     package-dir: "onlineexperimentation-rest"
+    is-modular-library: false
     package-details:
       name: "@azure-rest/onlineexperimentation"
       description: "Azure Online Experimentation Service"
diff --git a/specification/orbital/Microsoft.PlanetaryComputer/tspconfig.yaml b/specification/orbital/Microsoft.PlanetaryComputer/tspconfig.yaml
index 85666d68cea8..7933115c2aa9 100644
--- a/specification/orbital/Microsoft.PlanetaryComputer/tspconfig.yaml
+++ b/specification/orbital/Microsoft.PlanetaryComputer/tspconfig.yaml
@@ -27,6 +27,7 @@ options:
   #   flavor: azure
   # "@azure-tools/typespec-ts":
   #   package-dir: "planetarycomputer-rest"
+  #   is-modular-library: false
   #   package-details:
   #     name: "@azure-rest/planetarycomputer-rest"
   #   flavor: azure
diff --git a/specification/playwrighttesting/PlaywrightTesting.AuthManager/tspconfig.yaml b/specification/playwrighttesting/PlaywrightTesting.AuthManager/tspconfig.yaml
index 2692a75efb54..f0796edd5608 100644
--- a/specification/playwrighttesting/PlaywrightTesting.AuthManager/tspconfig.yaml
+++ b/specification/playwrighttesting/PlaywrightTesting.AuthManager/tspconfig.yaml
@@ -24,6 +24,7 @@ options:
     title: Microsoft Playwright Testing
     description: Microsoft Playwright Testing Client
     generate-metadata: true
+    is-modular-library: false
     package-details:
       name: "@azure-rest/microsoft-playwright-testing"
       description: "This package contains Microsoft Playwright Testing client library."
diff --git a/specification/programmableconnectivity/Azure.ProgrammableConnectivity/tspconfig.yaml b/specification/programmableconnectivity/Azure.ProgrammableConnectivity/tspconfig.yaml
index ebd4a89aa96d..45aed741e7fb 100644
--- a/specification/programmableconnectivity/Azure.ProgrammableConnectivity/tspconfig.yaml
+++ b/specification/programmableconnectivity/Azure.ProgrammableConnectivity/tspconfig.yaml
@@ -29,6 +29,7 @@ options:
     generate-sample: true
   "@azure-tools/typespec-ts":
     generate-metadata: true
+    is-modular-library: false
     package-dir: "programmableconnectivity-rest"
     package-details:
       name: "@azure-rest/programmableconnectivity"
diff --git a/specification/purview/Azure.Analytics.Purview.DataMap/tspconfig.yaml b/specification/purview/Azure.Analytics.Purview.DataMap/tspconfig.yaml
index 331a9efb32e6..0e569b94f98b 100644
--- a/specification/purview/Azure.Analytics.Purview.DataMap/tspconfig.yaml
+++ b/specification/purview/Azure.Analytics.Purview.DataMap/tspconfig.yaml
@@ -31,6 +31,7 @@ options:
   "@azure-tools/typespec-ts":
     package-dir: "purview-datamap-rest"
     generate-metadata: true
+    is-modular-library: false
     package-details:
       name: "@azure-rest/purview-datamap"
       description: Purview DataMap Service"
diff --git a/specification/riskiq/Easm/tspconfig.yaml b/specification/riskiq/Easm/tspconfig.yaml
index 75cf9bef3dec..a1a1a64113a8 100644
--- a/specification/riskiq/Easm/tspconfig.yaml
+++ b/specification/riskiq/Easm/tspconfig.yaml
@@ -25,6 +25,7 @@ options:
     model-namespace: false
   "@azure-tools/typespec-ts":
     package-dir: "defendereasm-rest"
+    is-modular-library: false
     package-details:
       name: "@azure-rest/defender-easm-rest"
     flavor: azure
diff --git a/specification/schemaregistry/SchemaRegistry/tspconfig.yaml b/specification/schemaregistry/SchemaRegistry/tspconfig.yaml
index ddd0289450c0..7f1ae3e3348b 100644
--- a/specification/schemaregistry/SchemaRegistry/tspconfig.yaml
+++ b/specification/schemaregistry/SchemaRegistry/tspconfig.yaml
@@ -30,6 +30,7 @@ options:
   "@azure-tools/typespec-ts":
     package-dir: "schema-registry"
     generate-metadata: false
+    is-modular-library: false
     package-details:
       name: "@azure/schema-registry"
     flavor: azure
diff --git a/specification/translation/Azure.AI.DocumentTranslation/tspconfig.yaml b/specification/translation/Azure.AI.DocumentTranslation/tspconfig.yaml
index 04c4461cdd44..5ae477aa9ec2 100644
--- a/specification/translation/Azure.AI.DocumentTranslation/tspconfig.yaml
+++ b/specification/translation/Azure.AI.DocumentTranslation/tspconfig.yaml
@@ -45,6 +45,7 @@ options:
   "@azure-tools/typespec-ts":
     package-dir: "ai-translation-document-rest"
     generate-metadata: true
+    is-modular-library: false
     package-details:
       name: "@azure-rest/ai-translation-document"
       description: "Microsoft Translation Document"
diff --git a/specification/translation/Azure.AI.TextTranslation/tspconfig.yaml b/specification/translation/Azure.AI.TextTranslation/tspconfig.yaml
index d0d62b6a1c87..f7bdad021caa 100644
--- a/specification/translation/Azure.AI.TextTranslation/tspconfig.yaml
+++ b/specification/translation/Azure.AI.TextTranslation/tspconfig.yaml
@@ -42,6 +42,7 @@ options:
   "@azure-tools/typespec-ts":
     package-dir: "ai-translation-text-rest"
     generate-metadata: false
+    is-modular-library: false
     package-details:
       name: "@azure-rest/ai-translation-text"
       description: "Microsoft Translation Text"
diff --git a/specification/trustedsigning/TrustedSigning/tspconfig.yaml b/specification/trustedsigning/TrustedSigning/tspconfig.yaml
index a18adfcdc4cc..361651b37022 100644
--- a/specification/trustedsigning/TrustedSigning/tspconfig.yaml
+++ b/specification/trustedsigning/TrustedSigning/tspconfig.yaml
@@ -31,6 +31,7 @@ options:
   "@azure-tools/typespec-ts":
     package-dir: "developer-trustedsigning-rest"
     generate-metadata: true
+    is-modular-library: false
     package-details:
       name: "@azure-rest/developer-trustedsigning"
       description: "Azure trusted signing service"