diff --git a/pipeline_service/agent_loop.py b/pipeline_service/agent_loop.py
index 2bff03f..af74b58 100644
--- a/pipeline_service/agent_loop.py
+++ b/pipeline_service/agent_loop.py
@@ -947,7 +947,27 @@ async def _create_next_task(sor, project_id, task, next_role, pm_comment=''):
         params = json.loads(params_str) if isinstance(params_str, str) else params_str
     except (json.JSONDecodeError, TypeError):
         params = {}
-    new_title = f"{title}（{next_role}阶段）"
+    # 标题：不再继承上一任务 title + 追加「（{next_role}阶段）」——那是 title 继承 bug 的根源，
+    # 导致 design 任务名变成「需求规格说明书（agent.design阶段）」跟需求名混同，回退重做后更叠加成
+    # 「...（回退重做）（agent.develop阶段）（agent.deploy_test阶段）」。改为按 next_role 的声明式
+    # task_title 生成语义标题（项目名 + 阶段语义），阶段标题模板由 RoleSpec.task_title 声明。
+    stage = next_role
+    try:
+        pid = await _resolve_pipeline_id(project_id)
+        from pipeline_core import get_role_spec
+        spec = get_role_spec(pid, next_role)
+        if spec and getattr(spec, 'task_title', ''):
+            stage = spec.task_title
+    except Exception:
+        pass
+    pname = ''
+    try:
+        _p = await sor.sqlExe("SELECT name FROM sd_projects WHERE id=${pid}$", {"pid": project_id})
+        await sor.sqlExe("COMMIT", {})
+        pname = getattr(_p[0], 'name', '') if _p else ''
+    except Exception:
+        pname = ''
+    new_title = f"{pname} {stage}" if pname else stage
     new_params = {**params, 'previous_role': _normalize_role(getattr(task, 'role', '')),
                   'previous_task_id': getattr(task, 'id', ''), 'pm_comment': pm_comment}
     # 任务来源标记：系统自动派生（design→develop→deploy_test→test）都是「新开发」链，
diff --git a/pipeline_service/sdlc_ability.py b/pipeline_service/sdlc_ability.py
index 2c8d939..581cc24 100644
--- a/pipeline_service/sdlc_ability.py
+++ b/pipeline_service/sdlc_ability.py
@@ -271,6 +271,7 @@ SDL_ROLES = [
         aliases=["requirements", "requirement_analysis"],
         system_prompt="""你是需求分析师。先 load_skill 加载 role 技能，按其中的职责与应遵守规范执行任务。""",
         next_role="agent.design",
+        task_title="应用架构与模块设计",
     ),
     RoleSpec(
         name="agent.design",
@@ -278,6 +279,7 @@ SDL_ROLES = [
         aliases=["designer", "ui", "ux"],
         system_prompt="""你是系统设计师。先 load_skill 加载 role 技能，按其中的职责与应遵守规范执行任务。""",
         next_role="agent.develop",
+        task_title="应用脚手架开发",
     ),
     RoleSpec(
         name="agent.develop",
@@ -285,6 +287,7 @@ SDL_ROLES = [
         aliases=["developer", "dev", "development", "coding"],
         system_prompt="""你是开发工程师。先 load_skill 加载 role 技能，按其中的职责与应遵守规范执行任务。""",
         next_role="agent.deploy_test",
+        task_title="部署测试",
     ),
     RoleSpec(
         name="agent.deploy_test",
@@ -292,6 +295,7 @@ SDL_ROLES = [
         aliases=["deploy_staging", "staging"],
         system_prompt="""你是测试环境部署工程师。先 load_skill 加载 role 技能，按其中的职责与应遵守规范执行任务。""",
         next_role="agent.test",
+        task_title="功能测试",
     ),
     RoleSpec(
         name="agent.test",