refactor: move bundled skills tree to repo root skills/

- Relocate runtime/skills -> skills/; runtime_skills_root() prefers oclaw/skills
  with fallback to legacy runtime/skills for unmigrated trees.
- session-bootstrap hook handler resolves repo root via PROJECT_ROOT.
- Update architecture/migration docs and in-tree skill references.

Co-authored-by: Cursor <cursoragent@cursor.com>

skills/_workspace/ops/ops-netx-ume-playbook/reference.md

@@ -0,0 +1,90 @@
+# Ops Netx UME 快速参考
+
+## 1) 当前告警明细（轻量入口）
+
+- 工具：`netx_query_ume_alarms`
+- 常用参数：
+  - `severity`, `ne_id`, `keyword`, `page`, `page_size`
+- 建议：
+  - 推荐 `page_size=50`
+  - 默认只看前 1 页（必要时最多 2 页），不要无脑翻页拉全量
+
+## 2) 原始明细（字段可控，推荐用于证据输出）
+
+- 工具：`netx_query_ume_alarms_raw`
+- 推荐流程：
+  - 先调用 `netx_list_ume_alarm_fields` 获取字段清单
+  - 再用 `select_fields` 控制返回字段，减少输出体积
+- 字段集预设（推荐优先用 preset，避免手写字段列表）：
+  - `field_preset=brief`：轻量概览（严重度/事件/最近时间/网元显示）
+  - `field_preset=evidence`：证据输出（含 object/cause/时间/网元状态）
+  - `field_preset=ne_debug`：定位网元信息缺失或状态异常
+- `select_fields` 示例：
+  - `alarm_alarm_key`
+  - `alarm_perceived_severity`
+  - `alarm_last_seen_at`
+  - `ne_user_label`
+  - `ne_ip_address`
+
+## 3) 动态聚合（非 SQL）
+
+- 工具：`netx_aggregate_ume_alarms_raw`
+- 常用分组：
+  - `group_by=alarm_perceived_severity`
+  - `group_by=ne_user_label`
+  - `group_by=alarm_event_type`
+  - `group_by=ne_connection_status`
+  - `group_by=alarm_perceived_severity, group_by2=ne_user_label`
+- 建议：
+  - 推荐 `limit=200`
+
+## 4) 诊断摘要
+
+- 工具：`netx_run_ume_diagnostics`
+- 用途：在深挖前先快速形成“概览简报”（严重度、Top 网元、Top 事件类型等）
+
+## 5) SQL 深度分析（受限）
+
+- 工具：`netx_sql_query_ume`
+- 约束：
+  - 仅允许 SELECT
+  - 仅允许表：`ume_alarms_current` / `ume_inventory_ne`
+  - 重查询务必设置 `statement_timeout_ms`
+  - 除非只是 `count(*)`，否则建议带时间窗（例如 `last_seen_at >= now() - interval '30 minutes'`）
+- 示例（全量聚合，谨慎使用）：
+```sql
+select
+  coalesce(ne.user_label, ne.ne_name, a.ne_id) as ne_display,
+  count(*) as alarm_count
+from ume_alarms_current a
+left join ume_inventory_ne ne on ne.ne_id = a.ne_id
+group by coalesce(ne.user_label, ne.ne_name, a.ne_id)
+order by alarm_count desc
+```
+
+- 示例（推荐：带时间窗 + 超时）：
+  - `statement_timeout_ms=8000`
+```sql
+select
+  coalesce(ne.user_label, ne.ne_name, a.ne_id) as ne_display,
+  count(*) as alarm_count
+from ume_alarms_current a
+left join ume_inventory_ne ne on ne.ne_id = a.ne_id
+where a.last_seen_at >= now() - interval '30 minutes'
+group by coalesce(ne.user_label, ne.ne_name, a.ne_id)
+order by alarm_count desc
+```
+
+- 示例（推荐：带时间窗 + 严重度过滤，现场最常用）：
+  - `statement_timeout_ms=8000`
+```sql
+select
+  coalesce(ne.user_label, ne.ne_name, a.ne_id) as ne_display,
+  count(*) as alarm_count
+from ume_alarms_current a
+left join ume_inventory_ne ne on ne.ne_id = a.ne_id
+where a.last_seen_at >= now() - interval '30 minutes'
+  and lower(coalesce(a.perceived_severity, '')) in ('critical','major')
+group by coalesce(ne.user_label, ne.ne_name, a.ne_id)
+order by alarm_count desc
+```