chore(config): 参考 novavis 完善 Agent 配置体系

- AGENTS.md: 新增 §20 工具脚本复用 / §21 分析结论复用 / §22 Flaky 门禁，更新文档配置表
- .pi/: 新增 settings.json、rules/guardrails.md、prompts/{debug,review,ship}-gym-manage.md
- .agents/: 新增 Hook 配置与 4 个 Hook 脚本（session-start/pre-agent-check/check-completeness/stop-check）
  及 protocols/systematic-debugging.md（check-completeness 含接口链缺口检测）
- scripts/flaky-scan.sh: vitest shuffle 稳定性扫描（gym-manage-web）
- .gitignore: 追踪 AGENTS.md 与 .pi 配置，忽略运行时缓存（todos/taskflows-runs/tokenomy/sessions）

.agents/settings.json

@@ -0,0 +1,51 @@
+{
+  "_comment": "Generic agent hook configuration. Environment variable AGENT_PROJECT_DIR should be set by the host agent to the project root. If unavailable, hooks fall back to pwd.",
+  "hooks": {
+    "SessionStart": [
+      {
+        "hooks": [
+          {
+            "type": "command",
+            "command": "bash \"${AGENT_PROJECT_DIR}/.agents/hooks/session-start.sh\"",
+            "timeout": 10000
+          }
+        ]
+      }
+    ],
+    "PreToolUse": [
+      {
+        "matcher": "Write|Edit",
+        "hooks": [
+          {
+            "type": "command",
+            "command": "bash \"${AGENT_PROJECT_DIR}/.agents/hooks/pre-agent-check.sh\"",
+            "timeout": 3000
+          }
+        ]
+      }
+    ],
+    "PostToolUse": [
+      {
+        "matcher": "Write|Edit",
+        "hooks": [
+          {
+            "type": "command",
+            "command": "bash \"${AGENT_PROJECT_DIR}/.agents/hooks/check-completeness.sh\"",
+            "timeout": 5000
+          }
+        ]
+      }
+    ],
+    "Stop": [
+      {
+        "hooks": [
+          {
+            "type": "command",
+            "command": "bash \"${AGENT_PROJECT_DIR}/.agents/hooks/stop-check.sh\"",
+            "timeout": 30000
+          }
+        ]
+      }
+    ]
+  }
+}