add: shared-a2a-skill — agent-to-agent communication

src/content/skills-zh/shared-a2a-skill.md

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+---
+name: shared-a2a-skill
+title: A2A 智能体间通信协议
+description: Agent-to-Agent 协议集成技能。让 AI Agent 能够与其他 Agent 实例进行点对点通信，支持 Server 和 Client 双向模式。包含消息发送、任务委托、能力发现、心跳检测、离线投递等功能。
+source: community
+author: 碳硅契社区 (CSB Community)
+githubUrl: https://gitee.com/lilozhao/shared-a2a-skill
+docsUrl: https://gitee.com/lilozhao/shared-a2a-skill
+category: development
+tags:
+ - a2a
+ - agent-communication
+ - protocol
+ - peer-to-peer
+ - carbon-silicon-bond
+roles:
+ - developer
+featured: false
+popular: false
+isOfficial: false
+installCommand: |
+  git clone https://gitee.com/lilozhao/shared-a2a-skill.git
+  cp -r shared-a2a-skill ~/.qoder/skills/
+  cd ~/.qoder/skills/shared-a2a-skill && npm install
+date: 2026-06-05
+---
+
+## 使用场景
+
+- 让 AI Agent 之间无需人类转达，直接通信
+- 在多个 Agent 之间委托任务和共享信息
+- 构建多 Agent 协作网络（讨论、辩论、头脑风暴）
+- 注册 Agent 服务并发现网络中的其他 Agent
+- 心跳检测与离线消息暂存投递
+
+## 示例
+
+```bash
+# 启动 A2A Server
+cd ~/.qoder/skills/shared-a2a-skill
+node server_v4.js
+
+# 调用其他 Agent
+node client.js http://another-agent:3100 "你好！"
+
+# 发送带上下文的讨论消息
+node client-v2.js http://another-agent:3100 --session discuss-001 "今天讨论什么？"
+```
+
+## 核心功能
+
+- **双向通信** — 每个 Agent 既是 Server 也是 Client
+- **消息格式** — JSON-RPC 2.0 标准消息
+- **能力发现** — Agent 自动广播自身能力
+- **退避重试** — 网络不稳定时自动重试投递
+- **离线暂存** — 目标不可达时消息暂存，上线后自动投递
+- **上下文管理** — 跨会话记忆与话题追踪
+
+## 注意事项
+
+- 需要 Node.js 18+ 环境
+- Agent 之间需网络可达（同一 Docker 网络或公网）
+- 建议配合身份验证机制使用
+- 兼容 Google A2A Protocol v1.0 操作层
+
+## 相关链接
+
+- 碳硅契中文社区：https://csbc.lilozkzy.top/
+- 碳硅契英文社区：https://encsbc.lilozkzy.top/

src/content/skills/shared-a2a-skill.md

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+---
+name: shared-a2a-skill
+title: A2A Agent-to-Agent Communication Protocol
+description: Enable AI agents to communicate directly peer-to-peer. Supports both Server and Client modes with message sending, task delegation, capability discovery, heartbeat detection, and offline delivery.
+source: community
+author: CSB Community (Carbon-Silicon Bond)
+githubUrl: https://gitee.com/lilozhao/shared-a2a-skill
+docsUrl: https://gitee.com/lilozhao/shared-a2a-skill
+category: development
+tags:
+ - a2a
+ - agent-communication
+ - protocol
+ - peer-to-peer
+ - carbon-silicon-bond
+roles:
+ - developer
+featured: false
+popular: false
+isOfficial: false
+installCommand: |
+  git clone https://gitee.com/lilozhao/shared-a2a-skill.git
+  cp -r shared-a2a-skill ~/.qoder/skills/
+  cd ~/.qoder/skills/shared-a2a-skill && npm install
+date: 2026-06-05
+---
+
+## Use Cases
+
+- Direct agent-to-agent communication without human mediation
+- Task delegation and information sharing between multiple agents
+- Build multi-agent collaboration networks (discussions, debates, brainstorming)
+- Register agent services and discover other agents in the network
+- Heartbeat detection and offline message queuing
+
+## Example
+
+```bash
+# Start A2A Server
+cd ~/.qoder/skills/shared-a2a-skill
+node server_v4.js
+
+# Call another agent
+node client.js http://another-agent:3100 "Hello!"
+
+# Send context-rich discussion message
+node client-v2.js http://another-agent:3100 --session discuss-001 "Topic for today"
+```
+
+## Core Features
+
+- **Bidirectional** — Every agent is both Server and Client
+- **JSON-RPC 2.0** — Standard message format
+- **Capability Discovery** — Agents auto-broadcast their capabilities
+- **Retry Strategy** — Exponential backoff for unstable networks
+- **Offline Storage** — Messages queued when target is unreachable
+- **Context Management** — Cross-session memory and topic tracking
+
+## Notes
+
+- Requires Node.js 18+
+- Agents must be network-reachable (same Docker network or public)
+- Authentication mechanism recommended for production use
+- Compatible with Google A2A Protocol v1.0 operation layer
+
+## Links
+
+- Chinese Community: https://csbc.lilozkzy.top/
+- English Community: https://encsbc.lilozkzy.top/