diff --git a/tools/tsp-client/package-lock.json b/tools/tsp-client/package-lock.json
index c15f584cc91..d4350c3073e 100644
--- a/tools/tsp-client/package-lock.json
+++ b/tools/tsp-client/package-lock.json
@@ -10,7 +10,7 @@
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@@ -597,6 +399,17 @@
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@@ -625,6 +438,14 @@
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+      "integrity": "sha512-9FC/6ho8uFa8fV50+FPy/ngWN53jaUu4GRXlAjcxIRrzhltJnpKkBG2Tp0IDraFJeWrOpk84RJ9EMEEYzaI1Bw==",
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "node_modules/@sindresorhus/merge-streams": {
       "version": "2.3.0",
       "resolved": "https://registry.npmjs.org/@sindresorhus/merge-streams/-/merge-streams-2.3.0.tgz",
@@ -842,6 +754,11 @@
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       "dev": true
     },
+    "node_modules/@types/json-schema": {
+      "version": "7.0.15",
+      "resolved": "https://registry.npmjs.org/@types/json-schema/-/json-schema-7.0.15.tgz",
+      "integrity": "sha512-5+fP8P8MFNC+AyZCDxrB2pkZFPGzqQWUzpSeuuVLvm8VMcorNYavBqoFcxK8bQz4Qsbn4oUEEem4wDLfcysGHA=="
+    },
     "node_modules/@types/mocha": {
       "version": "10.0.7",
       "resolved": "https://registry.npmjs.org/@types/mocha/-/mocha-10.0.7.tgz",
@@ -919,7 +836,6 @@
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@@ -931,7 +847,6 @@
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-      "peer": true,
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       },
@@ -940,33 +855,50 @@
         "@typespec/http": "~0.58.0"
       }
     },
-    "node_modules/@typespec/prettier-plugin-typespec": {
-      "version": "0.57.0",
-      "resolved": "https://registry.npmjs.org/@typespec/prettier-plugin-typespec/-/prettier-plugin-typespec-0.57.0.tgz",
-      "integrity": "sha512-nWrgv/yPGYfE4FL6ON3BpYZnvCdZYvE6yrgcr/ifqZnMBJfCLl4sk+tk3JoVysj6kTTWaFME7GQ/X/guMvbjUA==",
+    "node_modules/@typespec/openapi3": {
+      "version": "0.58.0",
+      "resolved": "https://registry.npmjs.org/@typespec/openapi3/-/openapi3-0.58.0.tgz",
+      "integrity": "sha512-G9t9CWT9cN6ip39dLZaE6JdEDxGsFyOUxA2s6a087rweoTH85XzsFiQL7uiUD8vHhXyEo6tF6sy3LMZVN0BsoQ==",
       "dependencies": {
-        "prettier": "~3.2.5"
+        "@readme/openapi-parser": "~2.6.0",
+        "yaml": "~2.4.5"
+      },
+      "bin": {
+        "tsp-openapi3": "cmd/tsp-openapi3.js"
+      },
+      "engines": {
+        "node": ">=18.0.0"
+      },
+      "peerDependencies": {
+        "@typespec/compiler": "~0.58.0",
+        "@typespec/http": "~0.58.0",
+        "@typespec/openapi": "~0.58.0",
+        "@typespec/versioning": "~0.58.0"
       }
     },
-    "node_modules/@typespec/prettier-plugin-typespec/node_modules/prettier": {
-      "version": "3.2.5",
-      "resolved": "https://registry.npmjs.org/prettier/-/prettier-3.2.5.tgz",
-      "integrity": "sha512-3/GWa9aOC0YeD7LUfvOG2NiDyhOWRvt1k+rcKhOuYnMY24iiCphgneUfJDyFXd6rZCAnuLBv6UeAULtrhT/F4A==",
+    "node_modules/@typespec/openapi3/node_modules/yaml": {
+      "version": "2.4.5",
+      "resolved": "https://registry.npmjs.org/yaml/-/yaml-2.4.5.tgz",
+      "integrity": "sha512-aBx2bnqDzVOyNKfsysjA2ms5ZlnjSAW2eG3/L5G/CSujfjLJTJsEw1bGw8kCf04KodQWk1pxlGnZ56CRxiawmg==",
       "bin": {
-        "prettier": "bin/prettier.cjs"
+        "yaml": "bin.mjs"
       },
       "engines": {
-        "node": ">=14"
-      },
-      "funding": {
-        "url": "https://github.com/prettier/prettier?sponsor=1"
+        "node": ">= 14"
+      }
+    },
+    "node_modules/@typespec/prettier-plugin-typespec": {
+      "version": "0.58.0",
+      "resolved": "https://registry.npmjs.org/@typespec/prettier-plugin-typespec/-/prettier-plugin-typespec-0.58.0.tgz",
+      "integrity": "sha512-GtG9MvVGKytT6jPEksySSRMKl6IYg7dWnjLWMkCwvoViuSAlz3lxjIO0hGUaU5maNCC2+fe5m4vvFmNXGlMOsg==",
+      "dependencies": {
+        "prettier": "~3.3.2"
       }
     },
     "node_modules/@typespec/rest": {
       "version": "0.58.0",
       "resolved": "https://registry.npmjs.org/@typespec/rest/-/rest-0.58.0.tgz",
       "integrity": "sha512-QBxkED0/KQKG22pwzis0n7BY+uLMSZZPSoVe/ESBFika9n5/yyeQ0l58xbFFwwfxAxe4xwuZ5PNwTdEXZbzr5g==",
-      "peer": true,
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         "node": ">=18.0.0"
       },
@@ -979,7 +911,6 @@
       "version": "0.58.0",
       "resolved": "https://registry.npmjs.org/@typespec/versioning/-/versioning-0.58.0.tgz",
       "integrity": "sha512-brnQQ3wKWh4AbgqmnVLj+8zyOaDk9VPWg4QBecdQxzz7PrSrlAzIzRfeIyr67+hwi/0SvkTAB6GNH7YYTypKGA==",
-      "peer": true,
       "engines": {
         "node": ">=18.0.0"
       },
@@ -1035,6 +966,19 @@
         "url": "https://github.com/sponsors/epoberezkin"
       }
     },
+    "node_modules/ajv-draft-04": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/ajv-draft-04/-/ajv-draft-04-1.0.0.tgz",
+      "integrity": "sha512-mv00Te6nmYbRp5DCwclxtt7yV/joXJPGS7nM+97GdxvuttCOfgI3K4U25zboyeX0O+myI8ERluxQe5wljMmVIw==",
+      "peerDependencies": {
+        "ajv": "^8.5.0"
+      },
+      "peerDependenciesMeta": {
+        "ajv": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/ansi-colors": {
       "version": "4.1.3",
       "resolved": "https://registry.npmjs.org/ansi-colors/-/ansi-colors-4.1.3.tgz",
@@ -1154,6 +1098,11 @@
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       "dev": true
     },
+    "node_modules/call-me-maybe": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/call-me-maybe/-/call-me-maybe-1.0.2.tgz",
+      "integrity": "sha512-HpX65o1Hnr9HH25ojC1YGs7HCQLq0GCOibSaWER0eNpgJ/Z1MZv2mTc7+xh6WOPxbRVcmgbv4hGU+uSQ/2xFZQ=="
+    },
     "node_modules/camelcase": {
       "version": "6.3.0",
       "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-6.3.0.tgz",
@@ -1279,6 +1228,14 @@
         "node": ">=8"
       }
     },
+    "node_modules/code-error-fragment": {
+      "version": "0.0.230",
+      "resolved": "https://registry.npmjs.org/code-error-fragment/-/code-error-fragment-0.0.230.tgz",
+      "integrity": "sha512-cadkfKp6932H8UkhzE/gcUqhRMNf8jHzkAN7+5Myabswaghu4xABTgPHDCjW+dBAJxj/SpkTYokpzDqY4pCzQw==",
+      "engines": {
+        "node": ">= 4"
+      }
+    },
     "node_modules/color-convert": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-2.0.1.tgz",
@@ -1619,11 +1576,15 @@
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       "integrity": "sha512-RbJ5/jmFcNNCcDV5o9eTnBLJ/HszWV0P73bc+Ff4nS/rJj+YaS6IGyiOL0VoBYX+l1Wrl3k63h/KrH+nhJ0XvQ=="
     },
+    "node_modules/grapheme-splitter": {
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/grapheme-splitter/-/grapheme-splitter-1.0.4.tgz",
+      "integrity": "sha512-bzh50DW9kTPM00T8y4o8vQg89Di9oLJVLW/KaOGIXJWP/iqCN6WKYkbNOF04vFLJhwcpYUh9ydh/+5vpOqV4YQ=="
+    },
     "node_modules/has-flag": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-4.0.0.tgz",
       "integrity": "sha512-EykJT/Q1KjTWctppgIAgfSO0tKVuZUjhgMr17kqTumMl6Afv3EISleU7qZUzoXDFTAHTDC4NOoG/ZxU3EvlMPQ==",
-      "dev": true,
       "engines": {
         "node": ">=8"
       }
@@ -1796,6 +1757,26 @@
       "resolved": "https://registry.npmjs.org/json-schema-traverse/-/json-schema-traverse-1.0.0.tgz",
       "integrity": "sha512-NM8/P9n3XjXhIZn1lLhkFaACTOURQXjWhV4BA/RnOv8xvgqtqpAX9IO4mRQxSx1Rlo4tqzeqb0sOlruaOy3dug=="
     },
+    "node_modules/json-to-ast": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/json-to-ast/-/json-to-ast-2.1.0.tgz",
+      "integrity": "sha512-W9Lq347r8tA1DfMvAGn9QNcgYm4Wm7Yc+k8e6vezpMnRT+NHbtlxgNBXRVjXe9YM6eTn6+p/MKOlV/aABJcSnQ==",
+      "dependencies": {
+        "code-error-fragment": "0.0.230",
+        "grapheme-splitter": "^1.0.4"
+      },
+      "engines": {
+        "node": ">= 4"
+      }
+    },
+    "node_modules/jsonpointer": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/jsonpointer/-/jsonpointer-5.0.1.tgz",
+      "integrity": "sha512-p/nXbhSEcu3pZRdkW1OfJhpsVtW1gd4Wa1fnQc9YLiTfAjn0312eMKimbdIQzuZl9aa9xUGaRlP9T/CJE/ditQ==",
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
     "node_modules/kleur": {
       "version": "3.0.3",
       "resolved": "https://registry.npmjs.org/kleur/-/kleur-3.0.3.tgz",
@@ -1804,6 +1785,14 @@
         "node": ">=6"
       }
     },
+    "node_modules/leven": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/leven/-/leven-3.1.0.tgz",
+      "integrity": "sha512-qsda+H8jTaUaN/x5vzW2rzc+8Rw4TAQ/4KjB46IwK5VH+IlVeeeje/EoZRpiXvIqjFgK84QffqPztGI3VBLG1A==",
+      "engines": {
+        "node": ">=6"
+      }
+    },
     "node_modules/locate-path": {
       "version": "6.0.0",
       "resolved": "https://registry.npmjs.org/locate-path/-/locate-path-6.0.0.tgz",
@@ -2276,6 +2265,12 @@
         "node": ">= 14"
       }
     },
+    "node_modules/openapi-types": {
+      "version": "12.1.3",
+      "resolved": "https://registry.npmjs.org/openapi-types/-/openapi-types-12.1.3.tgz",
+      "integrity": "sha512-N4YtSYJqghVu4iek2ZUvcN/0aqH1kRDuNqzcycDxhOUpg7GdvLa2F3DgS6yBNhInhv2r/6I0Flkn7CqL8+nIcw==",
+      "peer": true
+    },
     "node_modules/p-limit": {
       "version": "3.1.0",
       "resolved": "https://registry.npmjs.org/p-limit/-/p-limit-3.1.0.tgz",
@@ -2484,6 +2479,11 @@
         "node": ">=8.10.0"
       }
     },
+    "node_modules/regenerator-runtime": {
+      "version": "0.14.1",
+      "resolved": "https://registry.npmjs.org/regenerator-runtime/-/regenerator-runtime-0.14.1.tgz",
+      "integrity": "sha512-dYnhHh0nJoMfnkZs6GmmhFknAGRrLznOu5nc9ML+EJxGvrx6H7teuevqVqCuPcPK//3eDrrjQhehXVx9cnkGdw=="
+    },
     "node_modules/require-directory": {
       "version": "2.1.1",
       "resolved": "https://registry.npmjs.org/require-directory/-/require-directory-2.1.1.tgz",
diff --git a/tools/tsp-client/package.json b/tools/tsp-client/package.json
index d1915782760..aee88cad3c4 100644
--- a/tools/tsp-client/package.json
+++ b/tools/tsp-client/package.json
@@ -52,7 +52,7 @@
   },
   "dependencies": {
     "@autorest/csharp": "https://aka.ms/azsdk/openapi-to-typespec-csharp",
-    "@autorest/openapi-to-typespec": "0.8.2",
+    "@autorest/openapi-to-typespec": "0.9.0",
     "@azure-tools/typespec-autorest": "^0.44.0",
     "@azure/core-rest-pipeline": "^1.12.0",
     "@types/yargs": "^17.0.32",
diff --git a/tools/tsp-client/src/commands.ts b/tools/tsp-client/src/commands.ts
index bebd1d788fc..d46728a18cb 100644
--- a/tools/tsp-client/src/commands.ts
+++ b/tools/tsp-client/src/commands.ts
@@ -365,6 +365,7 @@ export async function convertCommand(argv: any): Promise<void> {
       `--use="${autorestCsharpPath}"`,
       `--output-folder="${outputDir}"`,
       "--mgmt-debug.only-generate-metadata",
+      "--mgmt-debug.suppress-list-exception",
       "--azure-arm",
       "--skip-csproj",
       `"${readme}"`,