diff --git a/extensions/matrix/src/matrix/monitor/replies.test.ts b/extensions/matrix/src/matrix/monitor/replies.test.ts
index 98fd857300a..f56a6e0e387 100644
--- a/extensions/matrix/src/matrix/monitor/replies.test.ts
+++ b/extensions/matrix/src/matrix/monitor/replies.test.ts
@@ -137,6 +137,29 @@ describe("deliverMatrixReplies", () => {
     );
   });
 
+  it("suppresses reasoning-only text before Matrix sends", async () => {
+    await deliverMatrixReplies({
+      cfg,
+      replies: [
+        { text: "Reasoning:\n_hidden_" },
+        { text: "<think>still hidden</think>" },
+        { text: "Visible answer" },
+      ],
+      roomId: "room:5",
+      client: {} as MatrixClient,
+      runtime: runtimeEnv,
+      textLimit: 4000,
+      replyToMode: "off",
+    });
+
+    expect(sendMessageMatrixMock).toHaveBeenCalledTimes(1);
+    expect(sendMessageMatrixMock).toHaveBeenCalledWith(
+      "room:5",
+      "Visible answer",
+      expect.objectContaining({ cfg }),
+    );
+  });
+
   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 12582e0c42e..5b47a8d1d98 100644
--- a/extensions/matrix/src/matrix/monitor/replies.ts
+++ b/extensions/matrix/src/matrix/monitor/replies.ts
@@ -8,6 +8,31 @@ import { getMatrixRuntime } from "../../runtime.js";
 import type { MatrixClient } from "../sdk.js";
 import { sendMessageMatrix } from "../send.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 {
+  if (typeof text !== "string") {
+    return false;
+  }
+  const trimmedStart = text.trimStart();
+  if (!trimmedStart) {
+    return false;
+  }
+  if (trimmedStart.toLowerCase().startsWith("reasoning:")) {
+    return true;
+  }
+  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();
+}
+
 export async function deliverMatrixReplies(params: {
   cfg: OpenClawConfig;
   replies: ReplyPayload[];
@@ -37,6 +62,10 @@ export async function deliverMatrixReplies(params: {
   const chunkMode = core.channel.text.resolveChunkMode(params.cfg, "matrix", params.accountId);
   let hasReplied = false;
   for (const reply of params.replies) {
+    if (reply.isReasoning === true || shouldSuppressReasoningReplyText(reply.text)) {
+      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) {
diff --git a/package.json b/package.json
index 2c6a8217762..22f60579ef8 100644
--- a/package.json
+++ b/package.json
@@ -353,7 +353,6 @@
     "@mariozechner/pi-ai": "0.57.1",
     "@mariozechner/pi-coding-agent": "0.57.1",
     "@mariozechner/pi-tui": "0.57.1",
-    "@matrix-org/matrix-sdk-crypto-nodejs": "^0.4.0",
     "@mozilla/readability": "^0.6.0",
     "@sinclair/typebox": "0.34.48",
     "@slack/bolt": "^4.6.0",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 430c335e9fe..736b2db205e 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -70,9 +70,6 @@ importers:
       '@mariozechner/pi-tui':
         specifier: 0.57.1
         version: 0.57.1
-      '@matrix-org/matrix-sdk-crypto-nodejs':
-        specifier: ^0.4.0
-        version: 0.4.0
       '@mozilla/readability':
         specifier: ^0.6.0
         version: 0.6.0
@@ -3618,8 +3615,8 @@ packages:
       link-preview-js:
         optional: true
 
-  '@whiskeysockets/libsignal-node@git+https://github.com/whiskeysockets/libsignal-node.git#1c30d7d7e76a3b0aa120b04dc6a26f5a12dccf67':
-    resolution: {commit: 1c30d7d7e76a3b0aa120b04dc6a26f5a12dccf67, repo: https://github.com/whiskeysockets/libsignal-node.git, type: git}
+  '@whiskeysockets/libsignal-node@git+https://git@github.com:whiskeysockets/libsignal-node.git#1c30d7d7e76a3b0aa120b04dc6a26f5a12dccf67':
+    resolution: {commit: 1c30d7d7e76a3b0aa120b04dc6a26f5a12dccf67, repo: git@github.com:whiskeysockets/libsignal-node.git, type: git}
     version: 2.0.1
 
   abbrev@1.1.1:
@@ -10474,7 +10471,7 @@ snapshots:
       '@cacheable/node-cache': 1.7.6
       '@hapi/boom': 9.1.4
       async-mutex: 0.5.0
-      libsignal: '@whiskeysockets/libsignal-node@git+https://github.com/whiskeysockets/libsignal-node.git#1c30d7d7e76a3b0aa120b04dc6a26f5a12dccf67'
+      libsignal: '@whiskeysockets/libsignal-node@git+https://git@github.com:whiskeysockets/libsignal-node.git#1c30d7d7e76a3b0aa120b04dc6a26f5a12dccf67'
       lru-cache: 11.2.6
       music-metadata: 11.12.1
       p-queue: 9.1.0
@@ -10489,7 +10486,7 @@ snapshots:
       - supports-color
       - utf-8-validate
 
-  '@whiskeysockets/libsignal-node@git+https://github.com/whiskeysockets/libsignal-node.git#1c30d7d7e76a3b0aa120b04dc6a26f5a12dccf67':
+  '@whiskeysockets/libsignal-node@git+https://git@github.com:whiskeysockets/libsignal-node.git#1c30d7d7e76a3b0aa120b04dc6a26f5a12dccf67':
     dependencies:
       curve25519-js: 0.0.4
       protobufjs: 6.8.8
diff --git a/src/auto-reply/reply/reply-payloads.test.ts b/src/auto-reply/reply/reply-payloads.test.ts
index 614fcd37951..30dbd98e0ac 100644
--- a/src/auto-reply/reply/reply-payloads.test.ts
+++ b/src/auto-reply/reply/reply-payloads.test.ts
@@ -1,6 +1,7 @@
 import { describe, expect, it } from "vitest";
 import {
   filterMessagingToolMediaDuplicates,
+  shouldSuppressReasoningPayload,
   shouldSuppressMessagingToolReplies,
 } from "./reply-payloads.js";
 
@@ -154,3 +155,27 @@ describe("shouldSuppressMessagingToolReplies", () => {
     ).toBe(true);
   });
 });
+
+describe("shouldSuppressReasoningPayload", () => {
+  it("suppresses raw reasoning-prefix text even when isReasoning is absent", () => {
+    expect(shouldSuppressReasoningPayload({ text: "  Reasoning:\n_hidden_" })).toBe(true);
+  });
+
+  it("suppresses thinking-tag-only text even when isReasoning is absent", () => {
+    expect(shouldSuppressReasoningPayload({ text: "<think>hidden</think>" })).toBe(true);
+  });
+
+  it("does not suppress text that merely mentions reasoning mid-message", () => {
+    expect(
+      shouldSuppressReasoningPayload({
+        text: "Intro line\nReasoning: appears in content but is not a prefix",
+      }),
+    ).toBe(false);
+  });
+
+  it("does not suppress messages that contain an answer outside thinking tags", () => {
+    expect(shouldSuppressReasoningPayload({ text: "<think>hidden</think>Visible answer" })).toBe(
+      false,
+    );
+  });
+});
diff --git a/src/auto-reply/reply/reply-payloads.ts b/src/auto-reply/reply/reply-payloads.ts
index 5a20d4ba950..367959c33b4 100644
--- a/src/auto-reply/reply/reply-payloads.ts
+++ b/src/auto-reply/reply/reply-payloads.ts
@@ -4,6 +4,7 @@ import { normalizeChannelId } from "../../channels/plugins/index.js";
 import type { ReplyToMode } from "../../config/types.js";
 import { normalizeTargetForProvider } from "../../infra/outbound/target-normalization.js";
 import { normalizeOptionalAccountId } from "../../routing/account-id.js";
+import { stripReasoningTagsFromText } from "../../shared/text/reasoning-tags.js";
 import { parseTelegramTarget } from "../../telegram/targets.js";
 import type { OriginatingChannelType } from "../templating.js";
 import type { ReplyPayload } from "../types.js";
@@ -71,7 +72,18 @@ export function isRenderablePayload(payload: ReplyPayload): boolean {
 }
 
 export function shouldSuppressReasoningPayload(payload: ReplyPayload): boolean {
-  return payload.isReasoning === true;
+  if (payload.isReasoning === true) {
+    return true;
+  }
+  const text = payload.text;
+  if (typeof text !== "string") {
+    return false;
+  }
+  if (text.trimStart().toLowerCase().startsWith("reasoning:")) {
+    return true;
+  }
+  const stripped = stripReasoningTagsFromText(text, { mode: "strict", trim: "both" });
+  return !stripped && stripped !== text;
 }
 
 export function applyReplyThreading(params: {