fix: read Slack thread replies for message reads (#1450) (#1450)

Co-authored-by: Peter Steinberger <steipete@gmail.com>
Co-authored-by: Rodrigo Uroz <rodrigouroz@users.noreply.github.com>

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

@@ -357,6 +357,20 @@ describe("handleSlackAction", () => {
     expect(payload.messages[0].timestampUtc).toBe(new Date(expectedMs).toISOString());
   });
 
+  it("passes threadId through to readSlackMessages", async () => {
+    const cfg = { channels: { slack: { botToken: "tok" } } } as ClawdbotConfig;
+    readSlackMessages.mockClear();
+    readSlackMessages.mockResolvedValueOnce({ messages: [], hasMore: false });
+
+    await handleSlackAction(
+      { action: "readMessages", channelId: "C1", threadId: "12345.6789" },
+      cfg,
+    );
+
+    const [, opts] = readSlackMessages.mock.calls[0] ?? [];
+    expect(opts?.threadId).toBe("12345.6789");
+  });
+
   it("adds normalized timestamps to pin payloads", async () => {
     const cfg = { channels: { slack: { botToken: "tok" } } } as ClawdbotConfig;
     listSlackPins.mockResolvedValueOnce([

src/agents/tools/slack-actions.ts

@@ -214,11 +214,13 @@ export async function handleSlackAction(
           typeof limitRaw === "number" && Number.isFinite(limitRaw) ? limitRaw : undefined;
         const before = readStringParam(params, "before");
         const after = readStringParam(params, "after");
+        const threadId = readStringParam(params, "threadId");
         const result = await readSlackMessages(channelId, {
           ...readOpts,
           limit,
           before: before ?? undefined,
           after: after ?? undefined,
+          threadId: threadId ?? undefined,
         });
         const messages = result.messages.map((message) =>
           withNormalizedTimestamp(