feat(engine): 添加MCP连接管理和工具集成功能

- 集成MCP连接管理器，支持MCP服务器连接
- 添加多种内置工具：ClarifyTool、CronTool、DelegateTool、ExecuteCodeTool、
  PatchFileTool、ProcessTool、SendMessageTool、SpawnTool、TerminalTool、
  TodoTool、WebFetchTool、WebSearchTool、WriteFileTool等
- 实现工具注册和装配功能
- 添加技能选择上下文参数
- 支持思考模式控制参数thinking_enabled

feat(coordinator): 重构任务执行计划器参数命名

- 将learning_candidate_enabled重命名为allow_candidate_generation
- 更新TeamGraphScheduler中的参数传递
- 修改LocalAgentRunner中的相关参数处理
- 更新README文档中的相应描述

refactor(context): 标准化工具调用参数格式

- 添加_json导入用于参数序列化
- 实现_provider_tool_calls方法标准化OpenAI兼容的工具调用载荷
- 修复工具调用中参数非字符串类型的序列化问题

refactor(session): 优化消息历史记录过滤逻辑

- 修改get_messages_as_conversation为基于运行状态过滤消息
- 排除未完成、失败或错误结束的运行记录
- 改进对话历史的可见性控制机制

fix(store): 修复FTS索引重建逻辑

- 添加异常处理防止FTS索引创建失败
- 实现_rebuild_fts_index方法重新构建全文搜索索引
- 优化索引触发器和表的维护流程

app-instance/backend/beaver/services/process_service.py

@@ -16,6 +16,7 @@ class SessionProcessProjector:
         run_records = {record.run_id: record for record in self.run_memory_store.list_runs()}
         runs: dict[str, dict[str, Any]] = {}
         events: list[dict[str, Any]] = []
+        artifacts: list[dict[str, Any]] = []
 
         def add_event(
             *,
@@ -84,7 +85,7 @@ class SessionProcessProjector:
                     "node_ids": node_ids,
                     "skill_queries": payload.get("skill_queries") or [],
                     "selected_skill_names": payload.get("selected_skill_names") or [],
-                    "generated_skill_draft_ids": payload.get("generated_skill_draft_ids") or [],
+                    "ephemeral_guidance_ids": payload.get("ephemeral_guidance_ids") or [],
                     "skill_resolution_report": payload.get("skill_resolution_report") or [],
                     "fallback_error": payload.get("fallback_error"),
                 }
@@ -151,13 +152,42 @@ class SessionProcessProjector:
                             "skill_query": item.get("skill_query"),
                             "selected_skill_names": item.get("selected_skill_names") or [],
                             "ephemeral_skill_names": item.get("ephemeral_skill_names") or [],
-                            "generated_skill_draft_id": item.get("generated_skill_draft_id"),
-                            "generated_skill_name": item.get("generated_skill_name"),
+                            "ephemeral_guidance_id": item.get("ephemeral_guidance_id"),
+                            "ephemeral_guidance_name": item.get("ephemeral_guidance_name"),
                             "ephemeral_used": bool(item.get("ephemeral_used")),
                             "finish_reason": item.get("finish_reason"),
                             "error": item.get("error"),
                         },
                     }
+                    guidance_id = item.get("ephemeral_guidance_id")
+                    if guidance_id:
+                        guidance_name = str(item.get("ephemeral_guidance_name") or guidance_id)
+                        artifacts.append(
+                            {
+                                "artifact_id": f"{node_run_id}:ephemeral-guidance:{guidance_id}",
+                                "run_id": str(node_run_id),
+                                "actor_type": "agent",
+                                "actor_id": str(item.get("node_id") or "sub-agent"),
+                                "actor_name": str(item.get("node_id") or "Sub-agent"),
+                                "title": f"Ephemeral guidance: {guidance_name}",
+                                "artifact_type": "markdown",
+                                "content": (
+                                    f"# Ephemeral guidance\n\n"
+                                    f"- Guidance: {guidance_name}\n"
+                                    f"- Guidance ID: {guidance_id}\n"
+                                    f"- Scope: current delegated sub-agent run only"
+                                ),
+                                "metadata": {
+                                    "task_id": task_id,
+                                    "attempt_index": attempt_index,
+                                    "node_id": item.get("node_id"),
+                                    "ephemeral_guidance_id": guidance_id,
+                                    "ephemeral_guidance_name": guidance_name,
+                                    "ephemeral_skill_names": item.get("ephemeral_skill_names") or [],
+                                },
+                                "created_at": created_at,
+                            }
+                        )
                     add_event(
                         event_id=f"{_event_id(record, 'node')}:{item.get('node_id')}",
                         run_id=str(node_run_id),
@@ -231,7 +261,7 @@ class SessionProcessProjector:
         return {
             "runs": sorted(runs.values(), key=lambda item: item.get("started_at") or ""),
             "events": sorted(events, key=lambda item: item.get("created_at") or ""),
-            "artifacts": [],
+            "artifacts": sorted(artifacts, key=lambda item: item.get("created_at") or ""),
             "agents": [],
         }