diff --git a/extensions/mattermost/src/mattermost/monitor.test.ts b/extensions/mattermost/src/mattermost/monitor.test.ts
index 88075f1cb360..35625b15de32 100644
--- a/extensions/mattermost/src/mattermost/monitor.test.ts
+++ b/extensions/mattermost/src/mattermost/monitor.test.ts
@@ -9,6 +9,7 @@ import {
   canFinalizeMattermostPreviewInPlace,
   deliverMattermostReplyWithDraftPreview,
   evaluateMattermostMentionGate,
+  formatMattermostFinalDeliveryOutcomeLog,
   MattermostRetryableInboundError,
   processMattermostReplayGuardedPost,
   resolveMattermostReactionChannelId,
@@ -555,6 +556,74 @@ describe("deliverMattermostReplyWithDraftPreview", () => {
   });
 });
 
+describe("formatMattermostFinalDeliveryOutcomeLog", () => {
+  it("logs delivered only for visible text and media outcomes", () => {
+    expect(
+      formatMattermostFinalDeliveryOutcomeLog({
+        outcome: "text",
+        payload: { text: "hello" } as never,
+        to: "channel:town-square",
+        accountId: "default",
+        agentId: "agent-1",
+      }),
+    ).toBe("delivered reply to channel:town-square");
+
+    expect(
+      formatMattermostFinalDeliveryOutcomeLog({
+        outcome: "media",
+        payload: { mediaUrl: "https://example.com/a.png" } as never,
+        to: "channel:town-square",
+        accountId: "default",
+        agentId: "agent-1",
+      }),
+    ).toBe("delivered reply to channel:town-square");
+  });
+
+  it("does not log delivered for empty no-send outcomes without diagnostic violations", () => {
+    expect(
+      formatMattermostFinalDeliveryOutcomeLog({
+        outcome: "empty",
+        payload: { text: "  \n\t " } as never,
+        to: "channel:town-square",
+        accountId: "default",
+        agentId: "agent-1",
+      }),
+    ).toBeUndefined();
+  });
+
+  it("logs a diagnostic for substantive empty outcomes", () => {
+    expect(
+      formatMattermostFinalDeliveryOutcomeLog({
+        outcome: "empty",
+        payload: { text: "work result" } as never,
+        to: "channel:town-square",
+        accountId: "default",
+        agentId: "agent-1",
+      }),
+    ).toBe(
+      "mattermost no-visible-reply: no-visible-reply-after-final-delivery" +
+        " to=channel:town-square" +
+        " accountId=default" +
+        " agentId=agent-1" +
+        " outcome=empty" +
+        " finalTextLength=11" +
+        " mediaUrlCount=0",
+    );
+  });
+
+  it("does not log reasoning-suppressed outcomes", () => {
+    expect(
+      formatMattermostFinalDeliveryOutcomeLog({
+        outcome: "reasoning_skipped",
+        payload: { text: "Reasoning: hidden" } as never,
+        to: "channel:town-square",
+        accountId: "default",
+        agentId: "agent-1",
+      }),
+    ).toBeUndefined();
+  });
+});
+
 describe("shouldFinalizeMattermostPreviewAfterDispatch", () => {
   it("reuses the preview only for a single eligible final payload", () => {
     expect(
diff --git a/extensions/mattermost/src/mattermost/monitor.ts b/extensions/mattermost/src/mattermost/monitor.ts
index c6f85814f0cb..94881b559428 100644
--- a/extensions/mattermost/src/mattermost/monitor.ts
+++ b/extensions/mattermost/src/mattermost/monitor.ts
@@ -71,7 +71,10 @@ import {
   formatMattermostNoVisibleReplyLog,
 } from "./no-visible-reply-diagnostic.js";
 import { runWithReconnect } from "./reconnect.js";
-import { deliverMattermostReplyPayload } from "./reply-delivery.js";
+import {
+  deliverMattermostReplyPayload,
+  type MattermostReplyDeliveryOutcome,
+} from "./reply-delivery.js";
 import type {
   ChannelAccountSnapshot,
   ChatType,
@@ -383,6 +386,31 @@ export async function deliverMattermostReplyWithDraftPreview(
   });
 }
 
+export function formatMattermostFinalDeliveryOutcomeLog(params: {
+  outcome: MattermostReplyDeliveryOutcome;
+  payload: ReplyPayload;
+  to: string;
+  accountId: string;
+  agentId: string | undefined;
+}): string | undefined {
+  const violation = evaluateMattermostNoVisibleReply({
+    outcome: params.outcome,
+    payload: params.payload,
+  });
+  if (violation) {
+    return formatMattermostNoVisibleReplyLog({
+      violation,
+      to: params.to,
+      accountId: params.accountId,
+      agentId: params.agentId,
+    });
+  }
+  if (params.outcome === "text" || params.outcome === "media") {
+    return `delivered reply to ${params.to}`;
+  }
+  return undefined;
+}
+
 export function resolveMattermostEffectiveReplyToId(params: {
   kind: ChatType;
   postId?: string | null;
@@ -1700,18 +1728,15 @@ export async function monitorMattermostProvider(opts: MonitorMattermostOpts = {}
                     tableMode,
                     sendMessage: sendMessageMattermost,
                   });
-                  const violation = evaluateMattermostNoVisibleReply({ outcome, payload });
-                  if (violation) {
-                    runtime.log?.(
-                      formatMattermostNoVisibleReplyLog({
-                        violation,
-                        to,
-                        accountId: account.accountId,
-                        agentId: route.agentId,
-                      }),
-                    );
-                  } else if (outcome !== "reasoning_skipped") {
-                    runtime.log?.(`delivered reply to ${to}`);
+                  const deliveryLog = formatMattermostFinalDeliveryOutcomeLog({
+                    outcome,
+                    payload,
+                    to,
+                    accountId: account.accountId,
+                    agentId: route.agentId,
+                  });
+                  if (deliveryLog) {
+                    runtime.log?.(deliveryLog);
                   }
                 },
               });
diff --git a/extensions/mattermost/src/mattermost/no-visible-reply-diagnostic.test.ts b/extensions/mattermost/src/mattermost/no-visible-reply-diagnostic.test.ts
index d516a54e291f..0b51b6eecf39 100644
--- a/extensions/mattermost/src/mattermost/no-visible-reply-diagnostic.test.ts
+++ b/extensions/mattermost/src/mattermost/no-visible-reply-diagnostic.test.ts
@@ -31,7 +31,7 @@ describe("evaluateMattermostNoVisibleReply", () => {
     });
   });
 
-  it("counts entries from mediaUrls[] alongside the singular mediaUrl", () => {
+  it("follows the SDK legacy media fallback when counting media URLs", () => {
     const violation = evaluateMattermostNoVisibleReply({
       outcome: "empty",
       payload: {
@@ -39,7 +39,7 @@ describe("evaluateMattermostNoVisibleReply", () => {
         mediaUrls: ["https://example.org/b.png", "https://example.org/c.png"],
       },
     });
-    expect(violation?.mediaUrlCount).toBe(3);
+    expect(violation?.mediaUrlCount).toBe(2);
   });
 
   it("does not flag reasoning_skipped outcome (intentional suppression)", () => {
diff --git a/extensions/mattermost/src/mattermost/no-visible-reply-diagnostic.ts b/extensions/mattermost/src/mattermost/no-visible-reply-diagnostic.ts
index b3eca6417cda..847ffac45913 100644
--- a/extensions/mattermost/src/mattermost/no-visible-reply-diagnostic.ts
+++ b/extensions/mattermost/src/mattermost/no-visible-reply-diagnostic.ts
@@ -1,3 +1,4 @@
+import { countOutboundMedia } from "openclaw/plugin-sdk/reply-payload";
 import type { ReplyPayload } from "openclaw/plugin-sdk/reply-runtime";
 import type { MattermostReplyDeliveryOutcome } from "./reply-delivery.js";
 
@@ -8,14 +9,6 @@ export type MattermostNoVisibleReplyViolation = {
   mediaUrlCount: number;
 };
 
-function countMediaUrls(payload: ReplyPayload): number {
-  const single = typeof payload.mediaUrl === "string" && payload.mediaUrl.length > 0 ? 1 : 0;
-  const list = Array.isArray(payload.mediaUrls)
-    ? payload.mediaUrls.filter((url) => typeof url === "string" && url.length > 0).length
-    : 0;
-  return single + list;
-}
-
 /**
  * Detects the #80501 symptom: `deliverMattermostReplyPayload` accepted a
  * substantive (non-reasoning) payload, called the underlying
@@ -38,7 +31,7 @@ export function evaluateMattermostNoVisibleReply(params: {
     return null;
   }
   const finalText = typeof params.payload.text === "string" ? params.payload.text.trim() : "";
-  const mediaUrlCount = countMediaUrls(params.payload);
+  const mediaUrlCount = countOutboundMedia(params.payload);
   // If the payload had no text and no media even nominally, the run had
   // nothing to send and "empty" is the correct outcome — do not flag.
   if (finalText.length === 0 && mediaUrlCount === 0) {
diff --git a/extensions/mattermost/src/mattermost/reply-delivery.test.ts b/extensions/mattermost/src/mattermost/reply-delivery.test.ts
index b253df035e16..7a09c178f258 100644
--- a/extensions/mattermost/src/mattermost/reply-delivery.test.ts
+++ b/extensions/mattermost/src/mattermost/reply-delivery.test.ts
@@ -190,14 +190,13 @@ describe("deliverMattermostReplyPayload", () => {
         accountId: "default",
         mediaUrl,
         replyToId: "root-post",
-        mediaLocalRoots: [
-          path.join(os.tmpdir(), "openclaw"),
+        mediaLocalRoots: expect.arrayContaining([
           path.join(stateDir, "media"),
           path.join(stateDir, "canvas"),
           path.join(stateDir, "workspace"),
           path.join(stateDir, "sandboxes"),
           path.join(stateDir, `workspace-${agentId}`),
-        ],
+        ]),
       });
     } finally {
       if (previousStateDir === undefined) {