docs: add ecosystem cross-links to sister projects

Author: jnMetaCode

README.md

@@ -400,6 +400,14 @@ guard.checkOutbound('send_email', {...})  // → { allowed: false } (读过敏
 >
 > 最新研究 ([arXiv:2603.08665](https://arxiv.org/abs/2603.08665)) 显示 GenAI 在 7 小时内发现 38 个真实漏洞 — AI 驱动的攻击正在规模化，防御必须内建到 Agent 层。
 
+### Ecosystem
+
+| Project | Description |
+|---------|-------------|
+| [agency-agents-zh](https://github.com/jnMetaCode/agency-agents-zh) | 186 AI role definitions for multi-agent workflows |
+| [agency-orchestrator](https://github.com/jnMetaCode/agency-orchestrator) | YAML-first multi-agent orchestrator — auto DAG, conditions, loops |
+| [superpowers-zh](https://github.com/jnMetaCode/superpowers-zh) | AI coding superpowers — 20 skills for Claude Code / Cursor |
+
 ### 作者
 
 [jnMetaCode](https://github.com/jnMetaCode) · Apache-2.0