feat: expose bot task progress

src/acp/worker.ts

@@ -5,6 +5,8 @@ import { AcpClient } from "./client.js";
 
 export class AcpSessionRestoreError extends Error {}
 
+export type AcpWorkerPhase = "idle" | "initializing" | "processing";
+
 export class AcpWorker {
   private child?: ChildProcessWithoutNullStreams;
   private client?: AcpClient;
@@ -14,6 +16,9 @@ export class AcpWorker {
   private stderrBytes = 0;
   nativeSessionId?: string;
   lastUsedAt = Date.now();
+  turnStartedAt?: number;
+  lastActivityAt?: number;
+  phase: AcpWorkerPhase = "idle";
   inFlight = false;
 
   constructor(
@@ -35,7 +40,11 @@ export class AcpWorker {
       this.exited = true;
       if (!this.stopping) this.crashed(new Error(`ACP worker exited (code=${code ?? "null"}, signal=${signal ?? "null"})`));
     });
-    this.client = new AcpClient(this.child, { initializeTimeoutMs: this.config.initializeTimeoutMs, policy: this.bot.permissions });
+    this.client = new AcpClient(this.child, {
+      initializeTimeoutMs: this.config.initializeTimeoutMs,
+      policy: this.bot.permissions,
+      onSessionActivity: () => { this.lastActivityAt = Date.now(); }
+    });
     try {
       await this.client.initialize();
       if (nativeSessionId) {
@@ -52,11 +61,15 @@ export class AcpWorker {
     }
   }
 
-  async prompt(text: string): Promise<string> {
+  async prompt(text: string, phase: Exclude<AcpWorkerPhase, "idle"> = "processing"): Promise<string> {
     if (!this.client || !this.nativeSessionId || this.exited) throw new Error("ACP worker is not available");
     if (this.inFlight) throw new Error("ACP worker already has an in-flight turn");
+    const now = Date.now();
     this.inFlight = true;
-    this.lastUsedAt = Date.now();
+    this.phase = phase;
+    this.turnStartedAt = now;
+    this.lastActivityAt = now;
+    this.lastUsedAt = now;
     this.abort = new AbortController();
     let timeout: NodeJS.Timeout | undefined;
     const timeoutPromise = new Promise<never>((_resolve, reject) => {
@@ -72,6 +85,9 @@ export class AcpWorker {
     } finally {
       if (timeout) clearTimeout(timeout);
       this.inFlight = false;
+      this.phase = "idle";
+      this.turnStartedAt = undefined;
+      this.lastActivityAt = undefined;
       this.abort = undefined;
       this.lastUsedAt = Date.now();
     }