feat(skill): beta 技能 diagnosing-bugs + 月度审阅与 evals 工具

- 新增 diagnosing-bugs（beta）：先建红循环再推理、二分定位、补回归测试；含 evals 与四段式文档
- 路由表加入难查 bug 行
- scripts/monthly-review.sh：一条命令跑月度审阅
- scripts/evals-status.py + reports/evals/TEMPLATE.md：evals 覆盖与回归报告模板
- skill-creator 实战记录 #1（待观察后晋升）

scripts/evals-status.py

@@ -0,0 +1,31 @@
+#!/usr/bin/env python3
+"""列出各技能的 evals 与是否已有回归报告（reports/evals/<name>.md）。"""
+from __future__ import annotations
+import json
+from pathlib import Path
+
+ROOT = Path(__file__).resolve().parent.parent
+rows = []
+for pj in sorted(ROOT.glob("skills-*/*-plugin/.claude-plugin/plugin.json")):
+    meta = json.loads(pj.read_text())
+    name = meta.get("install_name")
+    if not name:
+        continue
+    ev = next((pj.parent.parent / "skills").rglob("evals/evals.json"), None)
+    cases = 0
+    if ev:
+        try:
+            cases = len(json.loads(ev.read_text()).get("evals", []))
+        except Exception:
+            cases = 0
+    report = ROOT / "reports" / "evals" / f"{name}.md"
+    rows.append((name, meta.get("status", "promoted"), cases, report.is_file()))
+
+with_evals = sum(1 for r in rows if r[2] > 0)
+with_report = sum(1 for r in rows if r[3])
+print(f"{'技能':32} {'status':10} {'用例':4} 回归报告")
+for name, status, cases, has_report in rows:
+    if cases == 0:
+        continue
+    print(f"{name:32} {status:10} {cases:<4} {'有' if has_report else '-'}")
+print(f"\n有 evals 的技能: {with_evals}/{len(rows)}；已有回归报告: {with_report}/{with_evals}")