diff --git a/extensions/feishu/src/bot.stripBotMention.test.ts b/extensions/feishu/src/bot.stripBotMention.test.ts
index 543af29a0eb..1c23c8fced9 100644
--- a/extensions/feishu/src/bot.stripBotMention.test.ts
+++ b/extensions/feishu/src/bot.stripBotMention.test.ts
@@ -37,7 +37,7 @@ describe("normalizeMentions (via parseFeishuMessageEvent)", () => {
     expect(ctx.content).toBe("hello");
   });
 
-  it("normalizes bot mention to <at> tag in group (semantic content)", () => {
+  it("strips bot mention in group so slash commands work (#35994)", () => {
     const ctx = parseFeishuMessageEvent(
       makeEvent(
         "@_bot_1 hello",
@@ -46,7 +46,19 @@ describe("normalizeMentions (via parseFeishuMessageEvent)", () => {
       ) as any,
       BOT_OPEN_ID,
     );
-    expect(ctx.content).toBe('<at user_id="ou_bot">Bot</at> hello');
+    expect(ctx.content).toBe("hello");
+  });
+
+  it("strips bot mention in group preserving slash command prefix (#35994)", () => {
+    const ctx = parseFeishuMessageEvent(
+      makeEvent(
+        "@_bot_1 /model",
+        [{ key: "@_bot_1", name: "Bot", id: { open_id: "ou_bot" } }],
+        "group",
+      ) as any,
+      BOT_OPEN_ID,
+    );
+    expect(ctx.content).toBe("/model");
   });
 
   it("strips bot mention but normalizes other mentions in p2p (mention-forward)", () => {
diff --git a/extensions/feishu/src/bot.ts b/extensions/feishu/src/bot.ts
index de382d7efab..32423d7f176 100644
--- a/extensions/feishu/src/bot.ts
+++ b/extensions/feishu/src/bot.ts
@@ -764,14 +764,12 @@ export function parseFeishuMessageEvent(
   const rawContent = parseMessageContent(event.message.content, event.message.message_type);
   const mentionedBot = checkBotMentioned(event, botOpenId);
   const hasAnyMention = (event.message.mentions?.length ?? 0) > 0;
-  // In p2p, the bot mention is a pure addressing prefix with no semantic value;
-  // strip it so slash commands like @Bot /help still have a leading /.
+  // Strip the bot's own mention so slash commands like @Bot /help retain
+  // the leading /. This applies in both p2p *and* group contexts — the
+  // mentionedBot flag already captures whether the bot was addressed, so
+  // keeping the mention tag in content only breaks command detection (#35994).
   // Non-bot mentions (e.g. mention-forward targets) are still normalized to <at> tags.
-  const content = normalizeMentions(
-    rawContent,
-    event.message.mentions,
-    event.message.chat_type === "p2p" ? botOpenId : undefined,
-  );
+  const content = normalizeMentions(rawContent, event.message.mentions, botOpenId);
   const senderOpenId = event.sender.sender_id.open_id?.trim();
   const senderUserId = event.sender.sender_id.user_id?.trim();
   const senderFallbackId = senderOpenId || senderUserId || "";