fix(slack): scope download-file to channel and thread context

src/agents/tools/slack-actions.test.ts

@@ -216,6 +216,33 @@ describe("handleSlackAction", () => {
     );
   });
 
+  it("passes download scope (channel/thread) to downloadSlackFile", async () => {
+    downloadSlackFile.mockResolvedValueOnce(null);
+
+    const result = await handleSlackAction(
+      {
+        action: "downloadFile",
+        fileId: "F123",
+        to: "channel:C1",
+        replyTo: "123.456",
+      },
+      slackConfig(),
+    );
+
+    expect(downloadSlackFile).toHaveBeenCalledWith(
+      "F123",
+      expect.objectContaining({
+        channelId: "C1",
+        threadId: "123.456",
+      }),
+    );
+    expect(result).toEqual(
+      expect.objectContaining({
+        details: expect.objectContaining({ ok: false }),
+      }),
+    );
+  });
+
   it.each([
     {
       name: "JSON blocks",

src/agents/tools/slack-actions.ts

@@ -290,12 +290,17 @@ export async function handleSlackAction(
       }
       case "downloadFile": {
         const fileId = readStringParam(params, "fileId", { required: true });
+        const channelTarget = readStringParam(params, "channelId") ?? readStringParam(params, "to");
+        const channelId = channelTarget ? resolveSlackChannelId(channelTarget) : undefined;
+        const threadId = readStringParam(params, "threadId") ?? readStringParam(params, "replyTo");
         const maxBytes = account.config?.mediaMaxMb
           ? account.config.mediaMaxMb * 1024 * 1024
           : 20 * 1024 * 1024;
         const downloaded = await downloadSlackFile(fileId, {
           ...readOpts,
           maxBytes,
+          channelId,
+          threadId: threadId ?? undefined,
         });
         if (!downloaded) {
           return jsonResult({