feat(agentmail): 迁入 agentmail 技能包（13 个 skills），修正 baoyu-fetch 行尾并忽略 node_modules

agentmail/skills/agentmail-metrics/SKILL.md

@@ -0,0 +1,30 @@
+---
+name: "agentmail-metrics"
+description: "AgentMail: Operations on metrics"
+---
+
+# metrics
+
+> **PREREQUISITE:** Read `../agentmail-shared/SKILL.md` for auth, global flags, and output formatting. If missing, run `agentmail generate-skills` to create it.
+
+```bash
+agentmail metrics <method> [flags]
+```
+
+## API Resources
+
+ - `query-events` — Query Events
+ - `query-usage` — Query Usage
+## Discovering Commands
+
+**Agents: always prefer `--schema` over `--help`** — `--schema` returns JSON; `--help` returns human prose.
+
+```bash
+# Machine-readable surface (use this)
+agentmail metrics --schema
+agentmail metrics <method> --schema
+
+# Human-readable help (for humans)
+agentmail metrics --help
+```
+