新增 memory 和 skill 存储，实现 Agent 持续学习，并增加工具支持；增加 LLM progress detail 输出

src/session/toolContextStore.ts

@@ -0,0 +1,42 @@
+import { join } from "node:path";
+
+import { config } from "../config.js";
+import {
+  atomicWriteJson,
+  ensureDirectory,
+  readJsonFile,
+  removeFileIfExists,
+} from "../utils/fileStore.js";
+
+export type ToolSessionContext = {
+  actorKey: string;
+  clientSessionId: string;
+  projectId?: string;
+  projectKey: string;
+  sessionId: string;
+  traceId: string;
+};
+
+export class ToolSessionContextStore {
+  constructor(private readonly baseDir = config.SESSION_CONTEXT_STORAGE_DIR) {}
+
+  async initialize() {
+    await ensureDirectory(this.baseDir);
+  }
+
+  async write(context: ToolSessionContext) {
+    await atomicWriteJson(this.filePath(context.sessionId), context);
+  }
+
+  async read(sessionId: string) {
+    return await readJsonFile<ToolSessionContext>(this.filePath(sessionId));
+  }
+
+  async remove(sessionId: string) {
+    await removeFileIfExists(this.filePath(sessionId));
+  }
+
+  private filePath(sessionId: string) {
+    return join(this.baseDir, `${sessionId}.json`);
+  }
+}