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/skills/specs/storage.py

@@ -87,6 +87,11 @@ class SkillSpecStore:
             return str(self._read_json(current_path).get("current_version") or "") or None
         if (directory / "SKILL.md").exists():
             return "legacy"
+        versions_dir = directory / "versions"
+        if versions_dir.exists():
+            versions = [child.name for child in sorted(versions_dir.iterdir()) if child.is_dir()]
+            if versions:
+                return versions[-1]
         spec = self.get_skill_spec(name)
         if spec is not None and spec.current_version:
             return spec.current_version
@@ -182,6 +187,13 @@ class SkillSpecStore:
         drafts_dir.mkdir(parents=True, exist_ok=True)
         self._write_json(drafts_dir / f"draft-{draft.draft_id}.json", draft.to_dict())
 
+    def delete_draft(self, skill_name: str, draft_id: str) -> bool:
+        path = self._skill_dir(skill_name) / "drafts" / f"draft-{draft_id}.json"
+        if not path.exists():
+            return False
+        path.unlink()
+        return True
+
     def list_reviews(self, skill_name: str, draft_id: str | None = None) -> list[SkillReviewRecord]:
         reviews_dir = self._skill_dir(skill_name) / "reviews"
         if not reviews_dir.exists():
@@ -199,6 +211,19 @@ class SkillSpecStore:
         reviews_dir.mkdir(parents=True, exist_ok=True)
         self._write_json(reviews_dir / f"review-{review.review_id}.json", review.to_dict())
 
+    def delete_reviews_for_draft(self, skill_name: str, draft_id: str) -> int:
+        reviews_dir = self._skill_dir(skill_name) / "reviews"
+        if not reviews_dir.exists():
+            return 0
+        deleted = 0
+        for path in sorted(reviews_dir.glob("review-*.json")):
+            record = SkillReviewRecord.from_dict(self._read_json(path))
+            if record.draft_id != draft_id:
+                continue
+            path.unlink()
+            deleted += 1
+        return deleted
+
     def update_index(self, index_name: str, values: list[str]) -> None:
         self._write_json(self.index_dir / f"{index_name}.json", {"items": list(dict.fromkeys(values))})