diff --git a/extensions/matrix/src/matrix/monitor/replies.test.ts b/extensions/matrix/src/matrix/monitor/replies.test.ts
index 09a0e7342de5..17523109990e 100644
--- a/extensions/matrix/src/matrix/monitor/replies.test.ts
+++ b/extensions/matrix/src/matrix/monitor/replies.test.ts
@@ -183,6 +183,9 @@ describe("deliverMatrixReplies", () => {
       replies: [
         { text: "Reasoning:\n_hidden_" },
         { text: "<think>still hidden</think>" },
+        { text: "<mm:think>MiniMax private reasoning</mm:think>" },
+        { text: "<mm:thought>MiniMax private thought</mm:thought>" },
+        { text: "<antml:thinking>Anthropic private reasoning</antml:thinking>" },
         { text: "Visible answer" },
       ],
       roomId: "room:5",
@@ -198,6 +201,90 @@ describe("deliverMatrixReplies", () => {
     expect(sendOptions(0).cfg).toBe(cfg);
   });
 
+  it("delivers literal reasoning tags inside Markdown code", async () => {
+    const text = "Use `<mm:think>example</mm:think>` literally.";
+
+    await deliverMatrixReplies({
+      cfg,
+      replies: [{ text }],
+      roomId: "room:5",
+      client: {} as MatrixClient,
+      runtime: runtimeEnv,
+      textLimit: 4000,
+      replyToMode: "off",
+    });
+
+    expect(sendMessageMatrixMock).toHaveBeenCalledTimes(1);
+    expect(sendCall(0)[1]).toBe(text);
+  });
+
+  it("strips namespaced reasoning while delivering visible Matrix replies", async () => {
+    await deliverMatrixReplies({
+      cfg,
+      replies: [
+        { text: "<mm:think>MiniMax private reasoning</mm:think>Visible MiniMax answer" },
+        { text: "<antml:thinking>Anthropic private reasoning</antml:thinking>Visible answer" },
+        { text: "<br>Visible HTML answer<mm:think>MiniMax private reasoning</mm:think>" },
+        { text: "Visible safe answer<mm:think>unfinished private reasoning" },
+        { text: "Visible answer<think>old reasoning</think><think>unfinished private reasoning" },
+        { text: "<thinking>private reasoning</think>Visible alias answer" },
+        { text: "<final>Visible final answer" },
+      ],
+      roomId: "room:5",
+      client: {} as MatrixClient,
+      runtime: runtimeEnv,
+      textLimit: 4000,
+      replyToMode: "off",
+    });
+
+    expect(sendMessageMatrixMock).toHaveBeenCalledTimes(7);
+    expect(sendCall(0)[1]).toBe("Visible MiniMax answer");
+    expect(sendCall(1)[1]).toBe("Visible answer");
+    expect(sendCall(2)[1]).toBe("<br>Visible HTML answer");
+    expect(sendCall(3)[1]).toBe("Visible safe answer");
+    expect(sendCall(4)[1]).toBe("Visible answer");
+    expect(sendCall(5)[1]).toBe("Visible alias answer");
+    expect(sendCall(6)[1]).toBe("Visible final answer");
+  });
+
+  it("preserves significant whitespace in visible Markdown replies", async () => {
+    const text = "    indented Markdown code\n\nVisible line with a hard break  \nnext line";
+
+    await deliverMatrixReplies({
+      cfg,
+      replies: [{ text }],
+      roomId: "room:5",
+      client: {} as MatrixClient,
+      runtime: runtimeEnv,
+      textLimit: 4000,
+      replyToMode: "off",
+    });
+
+    expect(sendMessageMatrixMock).toHaveBeenCalledTimes(1);
+    expect(sendCall(0)[1]).toBe(text.trim());
+  });
+
+  it("delivers Matrix media without a reasoning-only caption", async () => {
+    await deliverMatrixReplies({
+      cfg,
+      replies: [
+        {
+          text: "<mm:think>MiniMax private reasoning</mm:think>",
+          mediaUrl: "https://example.com/a.jpg",
+        },
+      ],
+      roomId: "room:5",
+      client: {} as MatrixClient,
+      runtime: runtimeEnv,
+      textLimit: 4000,
+      replyToMode: "off",
+    });
+
+    expect(sendMessageMatrixMock).toHaveBeenCalledTimes(1);
+    expect(sendCall(0)[1]).toBe("");
+    expect(sendOptions(0).mediaUrl).toBe("https://example.com/a.jpg");
+  });
+
   it("uses supplied cfg for chunking and send delivery without reloading runtime config", async () => {
     const explicitCfg = {
       channels: {
diff --git a/extensions/matrix/src/matrix/monitor/replies.ts b/extensions/matrix/src/matrix/monitor/replies.ts
index 695c939a4b46..377465cf1fb8 100644
--- a/extensions/matrix/src/matrix/monitor/replies.ts
+++ b/extensions/matrix/src/matrix/monitor/replies.ts
@@ -1,33 +1,24 @@
 // Matrix plugin module implements replies behavior.
 import { normalizeLowercaseStringOrEmpty } from "openclaw/plugin-sdk/string-coerce-runtime";
+import { stripReasoningTagsFromText } from "openclaw/plugin-sdk/text-chunking";
 import { getMatrixRuntime } from "../../runtime.js";
 import type { MatrixClient } from "../sdk.js";
 import { chunkMatrixText, sendMessageMatrix } from "../send.js";
 import type { MarkdownTableMode, OpenClawConfig, ReplyPayload, RuntimeEnv } from "./runtime-api.js";
 
-const THINKING_TAG_RE = /<\s*\/?\s*(?:think(?:ing)?|thought|antthinking)\b[^<>]*>/gi;
-const THINKING_BLOCK_RE =
-  /<\s*(?:think(?:ing)?|thought|antthinking)\b[^<>]*>[\s\S]*?<\s*\/\s*(?:think(?:ing)?|thought|antthinking)\s*>/gi;
-
-function shouldSuppressReasoningReplyText(text?: string): boolean {
+function resolveVisibleMatrixReplyText(text?: string): string | undefined {
   if (typeof text !== "string") {
-    return false;
+    return undefined;
   }
   const trimmedStart = text.trimStart();
   if (!trimmedStart) {
-    return false;
+    return text;
   }
   if (normalizeLowercaseStringOrEmpty(trimmedStart).startsWith("reasoning:")) {
-    return true;
+    return undefined;
   }
-  THINKING_TAG_RE.lastIndex = 0;
-  if (!THINKING_TAG_RE.test(text)) {
-    return false;
-  }
-  THINKING_BLOCK_RE.lastIndex = 0;
-  const withoutThinkingBlocks = text.replace(THINKING_BLOCK_RE, "");
-  THINKING_TAG_RE.lastIndex = 0;
-  return !withoutThinkingBlocks.replace(THINKING_TAG_RE, "").trim();
+  const visibleText = stripReasoningTagsFromText(text, { mode: "strict", trim: "none" });
+  return visibleText.trim() ? visibleText : undefined;
 }
 
 export async function deliverMatrixReplies(params: {
@@ -60,11 +51,12 @@ export async function deliverMatrixReplies(params: {
   let hasReplied = false;
   let deliveredAny = false;
   for (const reply of params.replies) {
-    if (reply.isReasoning === true || shouldSuppressReasoningReplyText(reply.text)) {
+    const visibleText = resolveVisibleMatrixReplyText(reply.text);
+    const hasMedia = Boolean(reply?.mediaUrl) || (reply?.mediaUrls?.length ?? 0) > 0;
+    if (reply.isReasoning === true || (!hasMedia && reply.text && visibleText === undefined)) {
       logVerbose("matrix reply suppressed as reasoning-only");
       continue;
     }
-    const hasMedia = Boolean(reply?.mediaUrl) || (reply?.mediaUrls?.length ?? 0) > 0;
     if (!reply?.text && !hasMedia) {
       if (reply?.audioAsVoice) {
         logVerbose("matrix reply has audioAsVoice without media/text; skipping");
@@ -79,7 +71,7 @@ export async function deliverMatrixReplies(params: {
       : params.replyToMode === "off"
         ? undefined
         : replyToIdRaw;
-    const rawText = reply.text ?? "";
+    const rawText = visibleText ?? "";
     const mediaList = reply.mediaUrls?.length
       ? reply.mediaUrls
       : reply.mediaUrl