chore: add a script to check unsupported decorator usage

package.json

@@ -15,7 +15,7 @@
   },
   "type": "module",
   "scripts": {
-    "build": "npm run clean && npm run lint && npm run compile && npm run compile-rollup-plugins && npm run compile-default-extensions && npm run compile-language-packs && npm run compile-monaco-languages",
+    "build": "npm run clean && npm run lint && npm run check-unsupported-decorator && npm run compile && npm run compile-rollup-plugins && npm run compile-default-extensions && npm run compile-language-packs && npm run compile-monaco-languages",
     "compile": "NODE_OPTIONS=--max_old_space_size=16384 rollup --config rollup/rollup.config.ts --configPlugin 'typescript={tsconfig: `tsconfig.rollup-config.json`}' --vscode-version ${npm_package_config_vscode_version} --vscode-ref ${npm_package_config_vscode_ref} --vscode-commit ${npm_package_config_vscode_commit}",
     "compile-default-extensions": "NODE_OPTIONS=--max_old_space_size=16384 rollup --config rollup/rollup.default-extensions.ts --configPlugin 'typescript={tsconfig: `tsconfig.rollup-config-default-extensions.json`}'",
     "compile-language-packs": "NODE_OPTIONS=--max_old_space_size=16384 rollup --config rollup/rollup.language-packs.ts --configPlugin 'typescript={tsconfig: `tsconfig.rollup-config-language-packs.json`}'",
@@ -26,7 +26,8 @@
     "lint": "eslint '{src/**/*.ts,rollup/*.ts,*.ts}'",
     "update-vscode-dependencies": "tsx scripts/update-vscode-dependencies.ts",
     "release": "tsx release.ts",
-    "reset:repo": "git clean -f -X -d"
+    "reset:repo": "git clean -f -X -d",
+    "check-unsupported-decorator": "tsx scripts/check-unsupported-decorator.ts"
   },
   "config": {
     "vscode": {
@@ -80,6 +81,7 @@
     "rollup-plugin-copy": "^3.5.0",
     "rollup-plugin-dts": "^6.4.1",
     "semantic-release": "25.0.3",
+    "ts-morph": "^28.0.0",
     "tsx": "^4.21.0",
     "type-fest": "^5.5.0",
     "typescript": "^5.9.3",

scripts/check-unsupported-decorator.ts

@@ -0,0 +1,29 @@
+import { Project } from 'ts-morph'
+
+const project = new Project({ tsConfigFilePath: 'tsconfig.json' })
+const sourceFile = project.getSourceFileOrThrow('src/missing-services.ts')
+
+const issues: string[] = []
+
+for (const cls of sourceFile.getClasses()) {
+  for (const prop of cls.getProperties()) {
+    const initText = prop.getInitializer()?.getText().trim()
+    const usesUnsupported = initText === 'unsupported'
+    const hasDecorator = prop.getDecorator('Unsupported') != null
+
+    const loc = `${cls.getName()}.${prop.getName()} (line ${prop.getStartLineNumber()})`
+
+    if (usesUnsupported && !hasDecorator) {
+      issues.push(`❌ ${loc}: uses \`unsupported\` but is missing the @Unsupported decorator`)
+    }
+    if (!usesUnsupported && hasDecorator) {
+      issues.push(`❌ ${loc}: has @Unsupported decorator but does not use \`unsupported\``)
+    }
+  }
+}
+
+if (issues.length) {
+  console.error(issues.join('\n'))
+  process.exit(1)
+}
+console.log('✅ All consistent')

src/missing-services.ts

@@ -2066,11 +2066,8 @@ class ExtensionsScannerService implements IExtensionsScannerService {
     return unsupported()
   }
   onDidChangeCache: IExtensionsScannerService['onDidChangeCache'] = Event.None
-  @Unsupported
   scanAllExtensions: IExtensionsScannerService['scanAllExtensions'] = async () => []
-  @Unsupported
   scanSystemExtensions: IExtensionsScannerService['scanSystemExtensions'] = async () => []
-  @Unsupported
   scanUserExtensions: IExtensionsScannerService['scanUserExtensions'] = async () => []
   @Unsupported
   scanExtensionsUnderDevelopment: IExtensionsScannerService['scanExtensionsUnderDevelopment'] =
@@ -2725,7 +2722,6 @@ class TerminalService implements ITerminalService {
   createTerminal: ITerminalService['createTerminal'] = unsupported
   @Unsupported
   getInstanceFromId: ITerminalService['getInstanceFromId'] = unsupported
-  @Unsupported
   getReconnectedTerminals: ITerminalService['getReconnectedTerminals'] = () => undefined
   @Unsupported
   getActiveOrCreateInstance: ITerminalService['getActiveOrCreateInstance'] = unsupported
@@ -4100,7 +4096,6 @@ class AuthenticationService implements IAuthenticationService {
   getProviderIds: IAuthenticationService['getProviderIds'] = () => []
   @Unsupported
   getProvider: IAuthenticationService['getProvider'] = unsupported
-  @Unsupported
   getSessions: IAuthenticationService['getSessions'] = async () => []
   @Unsupported
   createSession: IAuthenticationService['createSession'] = unsupported
@@ -5669,7 +5664,6 @@ class McpRegistry implements IMcpRegistry {
   }
   @Unsupported
   setSavedInput: IMcpRegistry['setSavedInput'] = unsupported
-  @Unsupported
   getServerDefinition: IMcpRegistry['getServerDefinition'] = () =>
     constObservable({
       server: undefined,
@@ -5740,7 +5734,6 @@ class NullDefaultAccountService extends Disposable implements IDefaultAccountSer
   @Unsupported
   getDefaultAccountAuthenticationProvider: IDefaultAccountService['getDefaultAccountAuthenticationProvider'] =
     unsupported
-  @Unsupported
   setDefaultAccountProvider: IDefaultAccountService['setDefaultAccountProvider'] = () => {}
   refresh: IDefaultAccountService['refresh'] = async () => null
   @Unsupported
@@ -6946,6 +6939,7 @@ registerSingleton(IInlineChatHistoryService, InlineChatHistoryService, Instantia
 class BrowserViewWorkbenchService implements IBrowserViewWorkbenchService {
   _serviceBrand: undefined
 
+  @Unsupported
   getOrCreateBrowserViewModel: IBrowserViewWorkbenchService['getOrCreateBrowserViewModel'] =
     unsupported
   @Unsupported