docs: 添加 ag-ui 和 crewai 项目 skills 及更新文档

backend/AGENTS.md

@@ -209,4 +209,23 @@ class AgentType(str, Enum):
 
 ## Agent Loop (AG-UI Protocol)
 
-Agent loop functionality MUST follow the AG-UI protocol. Reference: `docs/knowledges/ag-ui-llms-full.txt`
+Agent loop functionality MUST follow the AG-UI protocol. **Use the `ag-ui` skill** for protocol reference and implementation guidance.
+
+## Multi-Agent Orchestration (CrewAI Framework)
+
+Multi-agent orchestration MUST use the CrewAI framework. **Use the `crewai` skill** for framework reference and implementation guidance.
+
+### Core Principles
+
+- Use CrewAI for orchestrating multiple agents working together
+- Define clear agent roles, tasks, and crews
+- Leverage built-in collaboration and delegation mechanisms
+- Follow CrewAI best practices for agent configuration
+
+### Key Components
+
+- **Agents**: Autonomous units with specific roles and goals
+- **Tasks**: Assignments that agents complete
+- **Crews**: Teams of agents working together
+- **Tools**: Capabilities available to agents
+- **Flows**: Workflow orchestration and state management