Add multi-agent collaboration system with 16-person team and two-tier governance

- agents/README.md documents company principles (first principles + practical
  delivery), 6-stage collaboration flow, and two-tier governance: CEO has
  highest priority and final say; work groups self-govern internally for
  staffing, scheduling, technical choices within CEO-defined boundaries.
- 16 employees recruited to match CPU physical core count, enabling up to
  16 subagents to run in parallel. Each profile.md has independent name,
  background, strengths, weaknesses, and performance log.
- Roles: 1 CEO, 3 architects (lin/yang/huang), 5 engineers (zhao/chen/li/
  zhou/sun), 3 QA (wang/liu/xu), 2 DevOps (ma/hu), 1 designer (zhu),
  1 writer (deng), 1 security (cao).
- Five working groups defined under agents/groups/: grp-quality-core,
  grp-ai-plugins, grp-cli-ux (B3), grp-build-matrix, grp-security-audit.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

agents/groups/grp-quality-core.md

@@ -0,0 +1,19 @@
+---
+group_id: grp-quality-core
+name: 核心质量小组
+members:
+  - architect-lin
+  - qa-wang
+mission: 确保插件化架构的代码质量和测试覆盖
+lead: qa-wang
+created: 2026-05-27
+active_tasks: []
+completed_tasks:
+  - C2: 扩展冒烟测试 (2026-05-27, 4个测试块, 通过验收)
+status: 待命
+---
+
+## 协作模式
+- 林深负责：分析测试需要覆盖的架构路径，设计测试用例框架
+- 王测负责：编写具体测试代码，验证边界条件，确保回归覆盖
+- 两人共同 Review 最终测试代码