fix: imessage dm replies and error details (#935)

src/auto-reply/reply/agent-runner-utils.test.ts

@@ -53,4 +53,38 @@ describe("buildThreadingToolContext", () => {
 
     expect(result.currentChannelId).toBe("chat:99");
   });
+
+  it("uses the sender handle for iMessage direct chats", () => {
+    const sessionCtx = {
+      Provider: "imessage",
+      ChatType: "direct",
+      From: "imessage:+15550001",
+      To: "chat_id:12",
+    } as TemplateContext;
+
+    const result = buildThreadingToolContext({
+      sessionCtx,
+      config: cfg,
+      hasRepliedRef: undefined,
+    });
+
+    expect(result.currentChannelId).toBe("imessage:+15550001");
+  });
+
+  it("uses chat_id for iMessage groups", () => {
+    const sessionCtx = {
+      Provider: "imessage",
+      ChatType: "group",
+      From: "group:7",
+      To: "chat_id:7",
+    } as TemplateContext;
+
+    const result = buildThreadingToolContext({
+      sessionCtx,
+      config: cfg,
+      hasRepliedRef: undefined,
+    });
+
+    expect(result.currentChannelId).toBe("chat_id:7");
+  });
 });

src/auto-reply/reply/agent-runner-utils.ts

@@ -26,7 +26,12 @@ export function buildThreadingToolContext(params: {
   const dock = getChannelDock(provider);
   if (!dock?.threading?.buildToolContext) return {};
   // WhatsApp context isolation keys off conversation id, not the bot's own number.
-  const threadingTo = provider === "whatsapp" ? (sessionCtx.From ?? sessionCtx.To) : sessionCtx.To;
+  const threadingTo =
+    provider === "whatsapp"
+      ? (sessionCtx.From ?? sessionCtx.To)
+      : provider === "imessage" && sessionCtx.ChatType === "direct"
+        ? (sessionCtx.From ?? sessionCtx.To)
+        : sessionCtx.To;
   return (
     dock.threading.buildToolContext({
       cfg: config,