diff --git a/packages/onebot/src/actions/group-admin.ts b/packages/onebot/src/actions/group-admin.ts
index 0c1adc31..23bda0e2 100644
--- a/packages/onebot/src/actions/group-admin.ts
+++ b/packages/onebot/src/actions/group-admin.ts
@@ -8,7 +8,7 @@ export function register(h: ApiHandler, ctx: ApiActionContext): void {
     const userId = asNumber(params.user_id);
     const reject = asBoolean(params.reject_add_request, false);
     if (!groupId || !userId) return failedResponse(RETCODE.BAD_REQUEST, 'group_id and user_id are required');
-    await ctx.setGroupKick(groupId, userId, reject);
+    await ctx.bridge.apis.groupAdmin.kickMember(groupId, userId, reject);
     return okResponse();
   });
 
@@ -17,7 +17,7 @@ export function register(h: ApiHandler, ctx: ApiActionContext): void {
     const userIds = Array.isArray(params.user_id) ? params.user_id.map(asNumber).filter(Boolean) : [];
     const reject = asBoolean(params.reject_add_request, false);
     if (!groupId || userIds.length === 0) return failedResponse(RETCODE.BAD_REQUEST, 'group_id and user_id array are required');
-    await ctx.setGroupKickMembers(groupId, userIds, reject);
+    await ctx.bridge.apis.groupAdmin.kickMembers(groupId, userIds, reject);
     return okResponse();
   });
 
@@ -26,7 +26,7 @@ export function register(h: ApiHandler, ctx: ApiActionContext): void {
     const userId = asNumber(params.user_id);
     const duration = asNumber(params.duration) || 1800;
     if (!groupId || !userId) return failedResponse(RETCODE.BAD_REQUEST, 'group_id and user_id are required');
-    await ctx.setGroupBan(groupId, userId, duration);
+    await ctx.bridge.apis.groupAdmin.muteMember(groupId, userId, duration);
     return okResponse();
   });
 
@@ -34,7 +34,7 @@ export function register(h: ApiHandler, ctx: ApiActionContext): void {
     const groupId = asNumber(params.group_id);
     const enable = asBoolean(params.enable, true);
     if (!groupId) return failedResponse(RETCODE.BAD_REQUEST, 'group_id is required');
-    await ctx.setGroupWholeBan(groupId, enable);
+    await ctx.bridge.apis.groupAdmin.muteAll(groupId, enable);
     return okResponse();
   });
 
@@ -82,7 +82,7 @@ export function register(h: ApiHandler, ctx: ApiActionContext): void {
   h.registerAction('set_group_leave', async (params) => {
     const groupId = asNumber(params.group_id);
     if (!groupId) return failedResponse(RETCODE.BAD_REQUEST, 'group_id is required');
-    await ctx.setGroupLeave(groupId);
+    await ctx.bridge.apis.groupAdmin.leave(groupId);
     return okResponse();
   });
 
diff --git a/packages/onebot/src/api-handler.ts b/packages/onebot/src/api-handler.ts
index 1e285c68..ebe7b8f6 100644
--- a/packages/onebot/src/api-handler.ts
+++ b/packages/onebot/src/api-handler.ts
@@ -61,12 +61,10 @@ export interface ApiActionContext {
   getGroupMemberList: (groupId: number, noCache?: boolean) => Promise<JsonObject[]>;
   getGroupMemberInfo: (groupId: number, userId: number, noCache?: boolean) => Promise<JsonObject | null>;
   getStrangerInfo: (userId: number) => Promise<JsonObject | null>;
-  // Group admin (adapters: rename Bridge methods to OneBot vocabulary)
-  setGroupKick: (groupId: number, userId: number, rejectAdd: boolean) => Promise<void>;
-  setGroupKickMembers: (groupId: number, userIds: number[], rejectAdd: boolean) => Promise<void>;
-  setGroupBan: (groupId: number, userId: number, duration: number) => Promise<void>;
-  setGroupWholeBan: (groupId: number, enable: boolean) => Promise<void>;
-  setGroupLeave: (groupId: number) => Promise<void>;
+  // Group admin (mute/kick/admin/card/name/title/leave/etc) — all
+  // accessed directly through `ctx.bridge.apis.groupAdmin.method()`
+  // after the #6 OneBot-side slim-down; no per-method passthrough
+  // here anymore.
   // Group file (adapters: field extraction + Bridge name translation)
   uploadGroupFile: (groupId: number, file: string, name?: string, folderId?: string, uploadFile?: boolean) => Promise<string | null>;
   uploadPrivateFile: (userId: number, file: string, name?: string, uploadFile?: boolean) => Promise<string | null>;
@@ -101,7 +99,6 @@ export interface ApiActionContext {
   forwardSingleMsg: (messageId: number, target: { groupId?: number; userId?: number }) => Promise<{ messageId: number }>;
   // Extended NapCat-compatible
   setFriendRemark: (userId: number, remark: string) => Promise<void>;
-  setGroupRemark: (groupId: number, remark: string) => Promise<void>;
   setGroupAvatar: (groupId: number, source: string) => Promise<void>;
   setMsgEmojiLike: (messageId: number, emojiId: string, set: boolean) => Promise<void>;
   markGroupMsgAsRead: (groupId: number, sequence: number) => Promise<void>;
diff --git a/packages/onebot/src/instance-context.ts b/packages/onebot/src/instance-context.ts
index 869a0878..ccbd36ad 100644
--- a/packages/onebot/src/instance-context.ts
+++ b/packages/onebot/src/instance-context.ts
@@ -111,12 +111,8 @@ export function buildApiContext(ref: OneBotInstanceContext): ApiActionContext {
     getGroupMemberInfo: (groupId, userId, noCache) => getGroupMemberInfo(bridge, groupId, userId, noCache),
     getStrangerInfo: (userId) => getStrangerInfo(bridge, userId),
 
-    // Group admin — names translate to OneBot vocabulary.
-    setGroupKick: (groupId, userId, reject) => bridge.apis.groupAdmin.kickMember(groupId, userId, reject),
-    setGroupKickMembers: (groupId, userIds, reject) => bridge.apis.groupAdmin.kickMembers(groupId, userIds, reject),
-    setGroupBan: (groupId, userId, duration) => bridge.apis.groupAdmin.muteMember(groupId, userId, duration),
-    setGroupWholeBan: (groupId, enable) => bridge.apis.groupAdmin.muteAll(groupId, enable),
-    setGroupLeave: (groupId) => bridge.apis.groupAdmin.leave(groupId),
+    // Group admin — actions now call `ctx.bridge.apis.groupAdmin.X(...)`
+    // directly; no per-method passthrough here anymore.
 
     // Group file — fileId field extraction + defaults.
     uploadGroupFile: async (groupId, file, name, folderId, uploadFile) => {
@@ -164,7 +160,6 @@ export function buildApiContext(ref: OneBotInstanceContext): ApiActionContext {
     handleDeleteFriend: (userId, block) => bridge.apis.friend.delete(userId, !!block),
     forceFetchClientKey: () => bridge.apis.web.forceFetchClientKey(),
     setFriendRemark: (userId, remark) => bridge.apis.friend.setRemark(userId, remark),
-    setGroupRemark: (groupId, remark) => bridge.apis.groupAdmin.setRemark(groupId, remark),
     setGroupAvatar: (groupId, source) => bridge.apis.profile.setGroupAvatar(groupId, source),
     getGroupFileCount: (groupId) => bridge.apis.groupFile.getCount(groupId),