diff --git a/CHANGELOG.md b/CHANGELOG.md
index 95ba337cc44..950befeaa73 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -53,6 +53,7 @@ Docs: https://docs.openclaw.ai
 
 ### Fixes
 
+- Discord: send initial content when creating non-forum threads so `thread-create` content is delivered. (#18117) Thanks @zerone0x.
 - Security: replace deprecated SHA-1 sandbox configuration hashing with SHA-256 for deterministic sandbox cache identity and recreation checks. Thanks @kexinoh.
 - Security/Logging: redact Telegram bot tokens from error messages and uncaught stack traces to prevent accidental secret leakage into logs. Thanks @aether-ai-agent.
 - Sandbox/Security: block dangerous sandbox Docker config (bind mounts, host networking, unconfined seccomp/apparmor) to prevent container escape via config injection. Thanks @aether-ai-agent.
diff --git a/src/discord/send.creates-thread.test.ts b/src/discord/send.creates-thread.test.ts
index 5e2f5b2d731..957b709937b 100644
--- a/src/discord/send.creates-thread.test.ts
+++ b/src/discord/send.creates-thread.test.ts
@@ -107,6 +107,61 @@ describe("sendMessageDiscord", () => {
     );
   });
 
+  it("sends initial message for non-forum threads with content", async () => {
+    const { rest, getMock, postMock } = makeDiscordRest();
+    getMock.mockResolvedValue({ type: ChannelType.GuildText });
+    postMock.mockResolvedValue({ id: "t1" });
+    await createThreadDiscord(
+      "chan1",
+      { name: "thread", content: "Hello thread!" },
+      { rest, token: "t" },
+    );
+    expect(postMock).toHaveBeenCalledTimes(2);
+    // First call: create thread
+    expect(postMock).toHaveBeenNthCalledWith(
+      1,
+      Routes.threads("chan1"),
+      expect.objectContaining({
+        body: expect.objectContaining({ name: "thread", type: ChannelType.PublicThread }),
+      }),
+    );
+    // Second call: send message to thread
+    expect(postMock).toHaveBeenNthCalledWith(
+      2,
+      Routes.channelMessages("t1"),
+      expect.objectContaining({
+        body: { content: "Hello thread!" },
+      }),
+    );
+  });
+
+  it("sends initial message for message-attached threads with content", async () => {
+    const { rest, getMock, postMock } = makeDiscordRest();
+    postMock.mockResolvedValue({ id: "t1" });
+    await createThreadDiscord(
+      "chan1",
+      { name: "thread", messageId: "m1", content: "Discussion here" },
+      { rest, token: "t" },
+    );
+    // Should not detect channel type for message-attached threads
+    expect(getMock).not.toHaveBeenCalled();
+    expect(postMock).toHaveBeenCalledTimes(2);
+    // First call: create thread from message
+    expect(postMock).toHaveBeenNthCalledWith(
+      1,
+      Routes.threads("chan1", "m1"),
+      expect.objectContaining({ body: { name: "thread" } }),
+    );
+    // Second call: send message to thread
+    expect(postMock).toHaveBeenNthCalledWith(
+      2,
+      Routes.channelMessages("t1"),
+      expect.objectContaining({
+        body: { content: "Discussion here" },
+      }),
+    );
+  });
+
   it("lists active threads by guild", async () => {
     const { rest, getMock } = makeDiscordRest();
     getMock.mockResolvedValue({ threads: [] });
diff --git a/src/discord/send.messages.ts b/src/discord/send.messages.ts
index 92ff6bb8ebb..1c8c67499a1 100644
--- a/src/discord/send.messages.ts
+++ b/src/discord/send.messages.ts
@@ -134,7 +134,17 @@ export async function createThreadDiscord(
   const route = payload.messageId
     ? Routes.threads(channelId, payload.messageId)
     : Routes.threads(channelId);
-  return await rest.post(route, { body });
+  const thread = (await rest.post(route, { body })) as { id: string };
+
+  // For non-forum channels, send the initial message separately after thread creation.
+  // Forum channels handle this via the `message` field in the request body.
+  if (!isForumLike && payload.content?.trim()) {
+    await rest.post(Routes.channelMessages(thread.id), {
+      body: { content: payload.content },
+    });
+  }
+
+  return thread;
 }
 
 export async function listThreadsDiscord(payload: DiscordThreadList, opts: DiscordReactOpts = {}) {