Update lmTools API

Author: benmcmorran

Extension/package.json

@@ -6452,7 +6452,10 @@
                 "modelDescription": "For the active C or C++ file, this tool provides: the language (C, C++, or CUDA), the language standard version (such as C++11, C++14, C++17, or C++20), the compiler (such as GCC, Clang, or MSVC), the target platform (such as x86, x64, or ARM), and the target architecture (such as 32-bit or 64-bit).",
                 "icon": "$(file-code)",
                 "parametersSchema": {},
-                "when": "(config.C_Cpp.experimentalFeatures =~ /^[eE]nabled$/)"
+                "when": "(config.C_Cpp.experimentalFeatures =~ /^[eE]nabled$/)",
+                "supportedContentTypes": [
+                    "text/plain"
+                ]
             }
         ]
     },

Extension/src/LanguageServer/lmTool.ts

@@ -44,14 +44,15 @@ const knownValues: { [Property in keyof ChatContextResult]?: { [id: string]: str
     }
 };
 
-class StringLanguageModelToolResult implements vscode.LanguageModelToolResult {
-    public constructor(public readonly value: string) { }
-    public toString(): string { return this.value; }
-}
+const plainTextContentType = 'text/plain';
 
 export class CppConfigurationLanguageModelTool implements vscode.LanguageModelTool {
-    public async invoke(_parameters: any, token: vscode.CancellationToken): Promise<vscode.LanguageModelToolResult> {
-        return new StringLanguageModelToolResult(await this.getContext(token));
+    public async invoke(options: vscode.LanguageModelToolInvocationOptions, token: vscode.CancellationToken): Promise<vscode.LanguageModelToolResult> {
+        const result: vscode.LanguageModelToolResult = {};
+        if (options.requestedContentTypes.includes(plainTextContentType)) {
+            result[plainTextContentType] = await this.getContext(token);
+        }
+        return result;
     }
 
     private async getContext(token: vscode.CancellationToken): Promise<string> {