feat(api): publish message history direction

Expose reverse_order in the SDK request types and regenerate the MCP action catalog for group and private message history.

Describe the anchored older-or-newer semantics and retain true as the backward-compatible default for existing clients.

Refs #229

packages/mcp/src/generated/catalog.json

@@ -3075,6 +3075,16 @@
             "minimum": 0
           },
           "default": 20
+        },
+        {
+          "name": "reverse_order",
+          "type": "bool",
+          "required": false,
+          "schema": {
+            "type": "boolean"
+          },
+          "default": true,
+          "desc": "仅在 message_id 非 0 时生效；true 返回锚点及更旧消息，false 返回锚点及更新消息"
         }
       ],
       "invariants": [],
@@ -3095,6 +3105,11 @@
             "type": "integer",
             "minimum": 0,
             "default": 20
+          },
+          "reverse_order": {
+            "type": "boolean",
+            "description": "仅在 message_id 非 0 时生效；true 返回锚点及更旧消息，false 返回锚点及更新消息",
+            "default": true
           }
         },
         "required": [
@@ -4436,6 +4451,16 @@
             "minimum": 0
           },
           "default": 20
+        },
+        {
+          "name": "reverse_order",
+          "type": "bool",
+          "required": false,
+          "schema": {
+            "type": "boolean"
+          },
+          "default": true,
+          "desc": "仅在 message_id 非 0 时生效；true 返回锚点及更旧消息，false 返回锚点及更新消息"
         }
       ],
       "invariants": [],
@@ -4457,6 +4482,11 @@
             "type": "integer",
             "minimum": 0,
             "default": 20
+          },
+          "reverse_order": {
+            "type": "boolean",
+            "description": "仅在 message_id 非 0 时生效；true 返回锚点及更旧消息，false 返回锚点及更新消息",
+            "default": true
           }
         },
         "required": [

packages/mcp/src/generated/catalog.ts

@@ -3078,6 +3078,16 @@ export const ACTIONS: CatalogAction[] = [
           "minimum": 0
         },
         "default": 20
+      },
+      {
+        "name": "reverse_order",
+        "type": "bool",
+        "required": false,
+        "schema": {
+          "type": "boolean"
+        },
+        "default": true,
+        "desc": "仅在 message_id 非 0 时生效；true 返回锚点及更旧消息，false 返回锚点及更新消息"
       }
     ],
     "invariants": [],
@@ -3098,6 +3108,11 @@ export const ACTIONS: CatalogAction[] = [
           "type": "integer",
           "minimum": 0,
           "default": 20
+        },
+        "reverse_order": {
+          "type": "boolean",
+          "description": "仅在 message_id 非 0 时生效；true 返回锚点及更旧消息，false 返回锚点及更新消息",
+          "default": true
         }
       },
       "required": [
@@ -4439,6 +4454,16 @@ export const ACTIONS: CatalogAction[] = [
           "minimum": 0
         },
         "default": 20
+      },
+      {
+        "name": "reverse_order",
+        "type": "bool",
+        "required": false,
+        "schema": {
+          "type": "boolean"
+        },
+        "default": true,
+        "desc": "仅在 message_id 非 0 时生效；true 返回锚点及更旧消息，false 返回锚点及更新消息"
       }
     ],
     "invariants": [],
@@ -4460,6 +4485,11 @@ export const ACTIONS: CatalogAction[] = [
           "type": "integer",
           "minimum": 0,
           "default": 20
+        },
+        "reverse_order": {
+          "type": "boolean",
+          "description": "仅在 message_id 非 0 时生效；true 返回锚点及更旧消息，false 返回锚点及更新消息",
+          "default": true
         }
       },
       "required": [

packages/sdk/src/types/params.ts

@@ -194,6 +194,8 @@ export interface SetGroupReactionParams extends JsonObject {
 export interface GetMessageHistoryParams extends JsonObject {
   message_id?: number;
   count?: number;
+  /** With a non-zero message_id, include the anchor and query older (`true`) or newer (`false`) messages. Defaults to `true`. */
+  reverse_order?: boolean;
 }
 
 export interface GetGroupMessageHistoryParams extends GroupIdParams, GetMessageHistoryParams {}