feat(teacher): 连接 Yuxi 老师并提供项目与会话只读工具

electron/coding-teacher/read-tools.ts

@@ -56,9 +56,14 @@ export function createTeacherReadTools(access: TeacherReadAccess) {
   return {
     definitions: teacherReadToolDefinitions,
     async execute(name: string, rawArguments: string, signal: AbortSignal, maxBytes = 2400): Promise<string> {
+      return (await this.executeResult(name, rawArguments, signal, maxBytes)).content;
+    },
+    async executeResult(name: string, rawArguments: string, signal: AbortSignal, maxBytes = 2400): Promise<{ status: 'success' | 'error'; content: string; truncated: boolean }> {
       signal.throwIfAborted();
       access.assertCurrent();
       let result: string;
+      let status: 'success' | 'error' = 'success';
+      let truncated = false;
       try {
         const args = JSON.parse(rawArguments) as Record<string, unknown>;
         if (!args || typeof args !== 'object' || Array.isArray(args)) throw new Error('Expected an object.');
@@ -71,6 +76,7 @@ export function createTeacherReadTools(access: TeacherReadAccess) {
           }
           case 'read_project_file': {
             const file = await files.content(access.projectPath, projectPath(args.path));
+            truncated = file.truncated;
             result = file.path + '\n' + lines(file.content, args)
               + (file.truncated ? '\n[File exceeds the 256 KiB text preview limit; only its beginning is available.]' : '');
             break;
@@ -90,13 +96,15 @@ export function createTeacherReadTools(access: TeacherReadAccess) {
             throw new Error('Only list_project_files, read_project_file and read_conversation are available.');
         }
       } catch (error) {
+        status = 'error';
         // Keep local OS paths and unrelated application data out of model errors.
         result = 'Read failed. Check the relative path, message id and line range. '
           + (error instanceof SyntaxError ? 'Tool arguments must be valid JSON.' : 'Only current-project text files and current-conversation messages are available.');
       }
       signal.throwIfAborted();
       access.assertCurrent();
-      return excerptTeacherText(result, maxBytes);
+      const content = excerptTeacherText(result, maxBytes);
+      return { status, content, truncated: truncated || content !== result };
     },
   };
 }