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-shared/SKILL.md

@@ -0,0 +1,60 @@
+---
+name: "agentmail-shared"
+description: "agentmail CLI: Shared patterns for authentication, global flags, and output formatting."
+---
+
+# agentmail — Shared Reference
+
+## Authentication
+
+- **BearerAuth** (bearer token): `AGENTMAIL_API_KEY` env var or keyring `agentmail:BearerAuth` (populated by `auth login`)
+- **TokenAuth** (bearer token): `AGENTMAIL_TOKEN` env var or keyring `agentmail:TokenAuth` (populated by `auth login`)
+
+These are alternative schemes for the same request — set **one** of:
+
+```bash
+export AGENTMAIL_API_KEY="<your-token>"
+export AGENTMAIL_TOKEN="<your-token>"
+```
+
+Verify authentication resolves:
+
+```bash
+agentmail auth status
+```
+
+## Global Flags
+
+These flags are available on every command in this CLI.
+
+| Flag | Description | Default |
+|------|-------------|---------|
+| `--dry-run` | Validate locally without sending the request | |
+| `--format <FMT>` | Output format: `json`, `table`, `yaml`, `csv`, `raw`, `jsonl`, `http` | `table` on a TTY, `json` when piped |
+| `--base-url <URL>` | Override the API base URL | |
+| `--params <JSON>` | URL/query/path parameters as JSON | |
+| `--json <JSON>` | Request body for POST/PATCH/PUT | |
+| `--no-retry` | Disable retries | |
+| `--no-extract` | Print the full response body | |
+
+## Output Formatting
+
+```bash
+# JSON (default)
+agentmail <resource> <method> --format json
+
+# Table view
+agentmail <resource> <method> --format table
+
+# Pipe-friendly: jq, grep, etc.
+agentmail <resource> <method> | jq '.fieldName'
+```
+
+## Dry Run
+
+Use `--dry-run` to preview the HTTP request without sending it:
+
+```bash
+agentmail <resource> <method> --dry-run
+```
+