diff --git a/docs/channels/matrix.md b/docs/channels/matrix.md
index ea3ddc2ecf1..94fdf6fcf8f 100644
--- a/docs/channels/matrix.md
+++ b/docs/channels/matrix.md
@@ -61,7 +61,7 @@ Wizard behavior that matters:
 - When you add another Matrix account interactively, the entered account name is normalized into the account ID used in config and env vars. For example, `Ops Bot` becomes `ops-bot`.
 - DM allowlist prompts accept full `@user:server` values immediately. Display names only work when live directory lookup finds one exact match; otherwise the wizard asks you to retry with a full Matrix ID.
 - Room allowlist prompts accept room IDs and aliases directly. They can also resolve joined-room names live, but unresolved names are only kept as typed during setup and are ignored later by runtime allowlist resolution. Prefer `!room:server` or `#alias:server`.
-- Runtime room/session identity uses the stable Matrix room ID. Room-declared aliases are only used as lookup inputs, not as the long-term session key or group channel identifier.
+- Runtime room/session identity uses the stable Matrix room ID. Room-declared aliases are only used as lookup inputs, not as the long-term session key or stable group identity.
 - To resolve room names before saving them, use `openclaw channels resolve --channel matrix "Project Room"`.
 
 Minimal token-based setup:
@@ -580,6 +580,6 @@ Live directory lookup uses the logged-in Matrix account:
 - `dm`: DM policy block (`enabled`, `policy`, `allowFrom`).
 - `dm.allowFrom` entries should be full Matrix user IDs unless you already resolved them through live directory lookup.
 - `accounts`: named per-account overrides. Top-level `channels.matrix` values act as defaults for these entries.
-- `groups`: per-room policy map. Prefer room IDs or aliases; unresolved room names are ignored at runtime. Session/group metadata uses the stable room ID after resolution.
+- `groups`: per-room policy map. Prefer room IDs or aliases; unresolved room names are ignored at runtime. Session/group identity uses the stable room ID after resolution, while human-readable labels still come from room names.
 - `rooms`: legacy alias for `groups`.
 - `actions`: per-action tool gating (`messages`, `reactions`, `pins`, `memberInfo`, `channelInfo`, `verification`).
diff --git a/docs/concepts/session.md b/docs/concepts/session.md
index 71a557de606..52bef140973 100644
--- a/docs/concepts/session.md
+++ b/docs/concepts/session.md
@@ -305,8 +305,10 @@ Each session entry records where it came from (best-effort) in `origin`:
   connector only updates delivery routing (for example, to keep a DM main session
   fresh), it should still provide inbound context so the session keeps its
   explainer metadata. Extensions can do this by sending `ConversationLabel`,
-  `GroupSubject`, `GroupChannel`, `GroupSpace`, and `SenderName` in the inbound
-  context and calling `recordSessionMetaFromInbound` (or passing the same context
-  to `updateLastRoute`).
-  `GroupChannel` should carry the stable provider-side channel identity when one
-  exists. For example, Matrix now uses the room ID instead of room-declared aliases.
+  `GroupSubject`, `GroupId`, `GroupChannel`, `GroupSpace`, and `SenderName` in
+  the inbound context and calling `recordSessionMetaFromInbound` (or passing the
+  same context to `updateLastRoute`).
+  `GroupId` should carry the stable provider-side group/channel identity when one
+  exists. `GroupChannel` remains the human-readable channel label. For example,
+  Matrix now uses the room ID in `GroupId` and keeps room labels separate from
+  that stable identity.
diff --git a/docs/zh-CN/channels/matrix.md b/docs/zh-CN/channels/matrix.md
index 074ae341f1b..0af138f471a 100644
--- a/docs/zh-CN/channels/matrix.md
+++ b/docs/zh-CN/channels/matrix.md
@@ -164,7 +164,7 @@ E2EE 配置（启用端到端加密）：
 - 每个房间的 `users` 允许列表可以进一步限制特定房间内的发送者（需完整 Matrix 用户 ID）。
 - 配置向导会提示输入房间允许列表（房间 ID、别名或名称），仅在精确且唯一匹配时解析名称。
 - 启动时，OpenClaw 将允许列表中的房间/用户名称解析为 ID 并记录映射；未解析的条目不会参与允许列表匹配。
-- 运行时的房间/会话标识使用稳定的 Matrix 房间 ID。房间自行声明的别名只作为查找输入，不作为长期会话键或群组频道标识。
+- 运行时的房间/会话标识使用稳定的 Matrix 房间 ID。房间自行声明的别名只作为查找输入，不作为长期会话键或稳定的群组标识。
 - 默认**不**自动加入邀请；使用 `channels.matrix.autoJoin` 和 `channels.matrix.autoJoinAllowlist` 控制。
 - 要**禁止所有房间**，设置 `channels.matrix.groupPolicy: "disabled"`（或保持空的允许列表）。
 - 旧版键名：`channels.matrix.rooms`（与 `groups` 相同的结构）。
@@ -213,7 +213,7 @@ E2EE 配置（启用端到端加密）：
 - `channels.matrix.groupPolicy`：`allowlist | open | disabled`（默认：allowlist）。
 - `channels.matrix.groupAllowFrom`：群组消息的允许发送者列表（需完整 Matrix 用户 ID）。
 - `channels.matrix.allowlistOnly`：强制私信 + 房间使用允许列表规则。
-- `channels.matrix.groups`：群组允许列表 + 每个房间的设置映射。运行时解析后，会话/群组元数据使用稳定的房间 ID。
+- `channels.matrix.groups`：群组允许列表 + 每个房间的设置映射。运行时解析后，会话/群组身份使用稳定的房间 ID，而人类可读标签仍来自房间名称。
 - `channels.matrix.rooms`：旧版群组允许列表/配置。
 - `channels.matrix.replyToMode`：话题/标签的 reply-to 模式。
 - `channels.matrix.mediaMaxMb`：入站/出站媒体上限（MB）。
diff --git a/docs/zh-CN/concepts/session.md b/docs/zh-CN/concepts/session.md
index d1edb7744c2..56a88428697 100644
--- a/docs/zh-CN/concepts/session.md
+++ b/docs/zh-CN/concepts/session.md
@@ -163,4 +163,4 @@ OpenClaw 将**每个智能体的一个直接聊天会话**视为主会话。直
 - `from`/`to`：入站信封中的原始路由 ID
 - `accountId`：提供商账户 ID（多账户时）
 - `threadId`：渠道支持时的线程/话题 ID
-  来源字段为私信、频道和群组填充。如果连接器仅更新投递路由（例如，保持私信主会话新鲜），它仍应提供入站上下文，以便会话保留其解释器元数据。扩展可以通过在入站上下文中发送 `ConversationLabel`、`GroupSubject`、`GroupChannel`、`GroupSpace` 和 `SenderName` 并调用 `recordSessionMetaFromInbound`（或将相同上下文传递给 `updateLastRoute`）来实现。`GroupChannel` 在提供商有稳定频道标识时应携带该稳定标识。例如，Matrix 现在使用房间 ID，而不是房间自行声明的别名。
+  来源字段为私信、频道和群组填充。如果连接器仅更新投递路由（例如，保持私信主会话新鲜），它仍应提供入站上下文，以便会话保留其解释器元数据。扩展可以通过在入站上下文中发送 `ConversationLabel`、`GroupSubject`、`GroupId`、`GroupChannel`、`GroupSpace` 和 `SenderName` 并调用 `recordSessionMetaFromInbound`（或将相同上下文传递给 `updateLastRoute`）来实现。`GroupId` 在提供商有稳定群组/频道标识时应携带该稳定标识。`GroupChannel` 继续表示人类可读的频道标签。例如，Matrix 现在把房间 ID 放在 `GroupId` 中，并将房间标签与该稳定标识分开。
diff --git a/extensions/matrix/src/matrix/monitor/handler.test.ts b/extensions/matrix/src/matrix/monitor/handler.test.ts
index 45add7bbbe2..b4d5595e01d 100644
--- a/extensions/matrix/src/matrix/monitor/handler.test.ts
+++ b/extensions/matrix/src/matrix/monitor/handler.test.ts
@@ -412,12 +412,14 @@ describe("matrix monitor handler pairing account scope", () => {
       }),
     );
 
-    expect(finalizeInboundContext).toHaveBeenCalledWith(
+    const finalized = vi.mocked(finalizeInboundContext).mock.calls.at(-1)?.[0];
+    expect(finalized).toEqual(
       expect.objectContaining({
         GroupSubject: "Ops Room",
-        GroupChannel: "!room:example.org",
+        GroupId: "!room:example.org",
       }),
     );
+    expect(finalized).not.toHaveProperty("GroupChannel");
   });
 
   it("routes bound Matrix threads to the target session key", async () => {
diff --git a/extensions/matrix/src/matrix/monitor/handler.ts b/extensions/matrix/src/matrix/monitor/handler.ts
index 4d11647123a..0ea035e84a2 100644
--- a/extensions/matrix/src/matrix/monitor/handler.ts
+++ b/extensions/matrix/src/matrix/monitor/handler.ts
@@ -630,7 +630,7 @@ export function createMatrixRoomMessageHandler(params: MatrixMonitorHandlerParam
         SenderId: senderId,
         SenderUsername: senderId.split(":")[0]?.replace(/^@/, ""),
         GroupSubject: isRoom ? (roomName ?? roomId) : undefined,
-        GroupChannel: isRoom ? roomId : undefined,
+        GroupId: isRoom ? roomId : undefined,
         GroupSystemPrompt: isRoom ? groupSystemPrompt : undefined,
         Provider: "matrix" as const,
         Surface: "matrix" as const,
diff --git a/src/auto-reply/reply/groups.ts b/src/auto-reply/reply/groups.ts
index dcf398d5a4b..168a0b0490d 100644
--- a/src/auto-reply/reply/groups.ts
+++ b/src/auto-reply/reply/groups.ts
@@ -63,7 +63,7 @@ export function resolveGroupRequireMention(params: {
   if (!channel) {
     return true;
   }
-  const groupId = groupResolution?.id ?? extractGroupId(ctx.From);
+  const groupId = groupResolution?.id ?? ctx.GroupId?.trim() ?? extractGroupId(ctx.From);
   const groupChannel = ctx.GroupChannel?.trim() ?? ctx.GroupSubject?.trim();
   const groupSpace = ctx.GroupSpace?.trim();
   let requireMention: boolean | undefined;
@@ -153,7 +153,10 @@ export function buildGroupIntro(params: {
     activation === "always"
       ? "Activation: always-on (you receive every group message)."
       : "Activation: trigger-only (you are invoked only when explicitly mentioned; recent context may be included).";
-  const groupId = params.sessionEntry?.groupId ?? extractGroupId(params.sessionCtx.From);
+  const groupId =
+    params.sessionEntry?.groupId ??
+    params.sessionCtx.GroupId?.trim() ??
+    extractGroupId(params.sessionCtx.From);
   const groupChannel =
     params.sessionCtx.GroupChannel?.trim() ?? params.sessionCtx.GroupSubject?.trim();
   const groupSpace = params.sessionCtx.GroupSpace?.trim();
diff --git a/src/auto-reply/templating.ts b/src/auto-reply/templating.ts
index 8ca3c2389bc..48a8594f504 100644
--- a/src/auto-reply/templating.ts
+++ b/src/auto-reply/templating.ts
@@ -111,6 +111,8 @@ export type MsgContext = {
   /** Human label for envelope headers (conversation label, not sender). */
   ConversationLabel?: string;
   GroupSubject?: string;
+  /** Stable provider-side group/channel identity when one exists (for example, a Matrix room ID). */
+  GroupId?: string;
   /** Human label for channel-like group conversations (e.g. #general, #support). */
   GroupChannel?: string;
   GroupSpace?: string;
diff --git a/src/config/sessions.test.ts b/src/config/sessions.test.ts
index 031b39e9ef7..17661df1038 100644
--- a/src/config/sessions.test.ts
+++ b/src/config/sessions.test.ts
@@ -134,6 +134,17 @@ describe("sessions", () => {
       ctx: { From: "12345-678@g.us", ChatType: "group", Provider: "whatsapp" },
       expected: "whatsapp:group:12345-678@g.us",
     },
+    {
+      name: "uses explicit group ids when inbound routing does not encode the group",
+      scope: "per-sender" as const,
+      ctx: {
+        From: "matrix:@alice:example.org",
+        ChatType: "channel",
+        Provider: "matrix",
+        GroupId: "!room:example.org",
+      },
+      expected: "matrix:channel:!room:example.org",
+    },
   ] as const;
 
   for (const testCase of deriveSessionKeyCases) {
diff --git a/src/config/sessions/group.ts b/src/config/sessions/group.ts
index 22fbd82f4d6..2ca8be24286 100644
--- a/src/config/sessions/group.ts
+++ b/src/config/sessions/group.ts
@@ -52,6 +52,7 @@ export function buildGroupDisplayName(params: {
 }
 
 export function resolveGroupSessionKey(ctx: MsgContext): GroupKeyResolution | null {
+  const explicitGroupId = ctx.GroupId?.trim();
   const from = typeof ctx.From === "string" ? ctx.From.trim() : "";
   const chatType = ctx.ChatType?.trim().toLowerCase();
   const normalizedChatType =
@@ -59,6 +60,7 @@ export function resolveGroupSessionKey(ctx: MsgContext): GroupKeyResolution | nu
 
   const isWhatsAppGroupId = from.toLowerCase().endsWith("@g.us");
   const looksLikeGroup =
+    Boolean(explicitGroupId) ||
     normalizedChatType === "group" ||
     normalizedChatType === "channel" ||
     from.includes(":group:") ||
@@ -88,11 +90,9 @@ export function resolveGroupSessionKey(ctx: MsgContext): GroupKeyResolution | nu
     : from.includes(":channel:") || normalizedChatType === "channel"
       ? "channel"
       : "group";
-  const id = headIsSurface
-    ? secondIsKind
-      ? parts.slice(2).join(":")
-      : parts.slice(1).join(":")
-    : from;
+  const id =
+    explicitGroupId ??
+    (headIsSurface ? (secondIsKind ? parts.slice(2).join(":") : parts.slice(1).join(":")) : from);
   const finalId = id.trim().toLowerCase();
   if (!finalId) {
     return null;
diff --git a/src/hooks/message-hook-mappers.test.ts b/src/hooks/message-hook-mappers.test.ts
index c365f463ade..2b988aca405 100644
--- a/src/hooks/message-hook-mappers.test.ts
+++ b/src/hooks/message-hook-mappers.test.ts
@@ -73,6 +73,7 @@ describe("message hook mappers", () => {
       channelId: "telegram",
       accountId: "acc-1",
       conversationId: "telegram:chat:456",
+      groupId: "telegram:chat:456",
     });
     expect(toPluginMessageReceivedEvent(canonical)).toEqual({
       from: "telegram:user:123",
@@ -99,6 +100,35 @@ describe("message hook mappers", () => {
     });
   });
 
+  it("prefers explicit group ids and preserves human-readable channel names", () => {
+    const canonical = deriveInboundMessageHookContext(
+      makeInboundCtx({
+        To: "room:!room:example.org",
+        OriginatingTo: "room:!room:example.org",
+        GroupId: "!room:example.org",
+        GroupChannel: undefined,
+        GroupSubject: "Ops Room",
+      }),
+    );
+
+    expect(canonical.groupId).toBe("!room:example.org");
+    expect(canonical.channelName).toBe("Ops Room");
+    expect(toPluginMessageContext(canonical)).toEqual({
+      channelId: "telegram",
+      accountId: "acc-1",
+      conversationId: "room:!room:example.org",
+      groupId: "!room:example.org",
+    });
+    expect(toPluginMessageReceivedEvent(canonical)).toEqual(
+      expect.objectContaining({
+        metadata: expect.objectContaining({
+          channelName: "Ops Room",
+          groupId: "!room:example.org",
+        }),
+      }),
+    );
+  });
+
   it("maps transcribed and preprocessed internal payloads", () => {
     const cfg = {} as OpenClawConfig;
     const canonical = deriveInboundMessageHookContext(makeInboundCtx({ Transcript: undefined }));
@@ -131,6 +161,7 @@ describe("message hook mappers", () => {
       channelId: "telegram",
       accountId: "acc-1",
       conversationId: "telegram:chat:456",
+      groupId: "telegram:chat:456",
     });
     expect(toPluginMessageSentEvent(canonical)).toEqual({
       to: "telegram:chat:456",
diff --git a/src/hooks/message-hook-mappers.ts b/src/hooks/message-hook-mappers.ts
index 1cdd12a93ac..d80dc0d4799 100644
--- a/src/hooks/message-hook-mappers.ts
+++ b/src/hooks/message-hook-mappers.ts
@@ -72,7 +72,8 @@ export function deriveInboundMessageHookContext(
           : "");
   const channelId = (ctx.OriginatingChannel ?? ctx.Surface ?? ctx.Provider ?? "").toLowerCase();
   const conversationId = ctx.OriginatingTo ?? ctx.To ?? ctx.From ?? undefined;
-  const isGroup = Boolean(ctx.GroupSubject || ctx.GroupChannel);
+  const explicitGroupId = ctx.GroupId?.trim();
+  const isGroup = Boolean(explicitGroupId || ctx.GroupSubject || ctx.GroupChannel);
   return {
     from: ctx.From ?? "",
     to: ctx.To,
@@ -105,9 +106,9 @@ export function deriveInboundMessageHookContext(
     originatingChannel: ctx.OriginatingChannel,
     originatingTo: ctx.OriginatingTo,
     guildId: ctx.GroupSpace,
-    channelName: ctx.GroupChannel,
+    channelName: ctx.GroupChannel ?? ctx.GroupSubject,
     isGroup,
-    groupId: isGroup ? conversationId : undefined,
+    groupId: explicitGroupId ?? (isGroup ? conversationId : undefined),
   };
 }
 
@@ -144,6 +145,7 @@ export function toPluginMessageContext(
     channelId: canonical.channelId,
     accountId: canonical.accountId,
     conversationId: canonical.conversationId,
+    groupId: canonical.groupId,
   };
 }
 
@@ -168,6 +170,7 @@ export function toPluginMessageReceivedEvent(
       senderE164: canonical.senderE164,
       guildId: canonical.guildId,
       channelName: canonical.channelName,
+      groupId: canonical.groupId,
     },
   };
 }
@@ -205,6 +208,7 @@ export function toInternalMessageReceivedContext(
       senderE164: canonical.senderE164,
       guildId: canonical.guildId,
       channelName: canonical.channelName,
+      groupId: canonical.groupId,
     },
   };
 }
diff --git a/src/plugins/types.ts b/src/plugins/types.ts
index 4c5894ddda1..b8fe08efa71 100644
--- a/src/plugins/types.ts
+++ b/src/plugins/types.ts
@@ -560,6 +560,7 @@ export type PluginHookMessageContext = {
   channelId: string;
   accountId?: string;
   conversationId?: string;
+  groupId?: string;
 };
 
 // message_received hook