diff --git a/mysql.ddl.sql b/mysql.ddl.sql
index 4373e23..2f13e7c 100644
--- a/mysql.ddl.sql
+++ b/mysql.ddl.sql
@@ -236,6 +236,7 @@ CREATE TABLE sd_projects
   `status` VARCHAR(20) NOT NULL  DEFAULT ''draft'' comment '项目状态',
   `org_id` VARCHAR(32) NOT NULL  DEFAULT ''0'' comment '组织ID',
   `created_by` VARCHAR(32)   comment '创建人',
+  `default_model` VARCHAR(128)   comment '项目缺省模型(llm.name,创建项目时记录当前会话模型,角色agent缺省用)',
   `created_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP NOT NULL  comment '创建时间',
   `updated_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP   comment '更新时间'
 
@@ -331,3 +332,21 @@ comment '微信用户绑定(openid→系统用户)'
 CREATE  UNIQUE INDEX wechat_user_binding_idx_wub_openid ON wechat_user_binding(openid);
 CREATE  INDEX wechat_user_binding_idx_wub_user ON wechat_user_binding(user_id);
 
+
+CREATE TABLE sd_project_role_models
+(
+  `id` VARCHAR(32) NOT NULL  comment '主键ID',
+  `project_id` VARCHAR(32) NOT NULL  comment '项目ID',
+  `role` VARCHAR(64) NOT NULL  comment '角色名(agent.requirement/agent.develop等)',
+  `model_name` VARCHAR(128)  comment '模型名(llm.name,空=用用户当前模型)',
+  `created_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP NOT NULL  comment '创建时间',
+  `updated_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP  comment '更新时间'
+,primary key(id)
+)
+CHARACTER SET utf8mb4
+COLLATE utf8mb4_unicode_ci
+engine=innodb
+comment '项目-角色-模型映射(角色agent模型配置,缺省用用户当前模型)'
+;
+CREATE  UNIQUE INDEX sd_project_role_models_idx_pr ON sd_project_role_models(project_id, role);
+