chore: 移除 resolve_key() 等 skill 端函数，更新 CLAUDE.md 配置描述

CLAUDE.md

@@ -55,7 +55,7 @@ mytoolkit env list              # 查看所有 key
 mytoolkit env export            # 导出为 shell export 语句
 ```
 
-API key 读取顺序（所有 skill 脚本统一）：环境变量 → `~/.mytoolkit/config.json`。共享调用为 `mytoolkit.config.resolve_key()`。
+本文件仅管理 mytoolkit 自身配置。Skill 脚本各自由其自身管理 API key（读取 `~/.xiaohe/agent/config.json`），与本配置独立。
 
 ## 3. 语音合成 (TTS)
 

mytoolkit/config.py

@@ -126,56 +126,3 @@ class Config:
 
 # Global singleton
 config = Config()
-
-
-# ------------------------------------------------------------------
-# Shared utility: 2-layer key resolution for skill scripts
-# ------------------------------------------------------------------
-
-def resolve_key(name: str) -> str:
-    """Two-layer key resolution.
-
-    Priority:
-        1. Environment variable (checks ``MYCLI_<NAME>`` first, then ``<NAME>``)
-        2. ``~/.mytoolkit/config.json`` → ``keys.<name>``
-
-    Returns the key value, or ``""`` if not found.
-    """
-    # 1. Env var (MYCLI_ prefix first, then bare)
-    env_name = name.upper()
-    for var in (f"MYCLI_{env_name}", env_name):
-        val = os.environ.get(var, "")
-        if val:
-            return val
-
-    # 2. ~/.mytoolkit/config.json
-    try:
-        cfg_path = Path.home() / ".mytoolkit" / "config.json"
-        if cfg_path.exists():
-            data = json.loads(cfg_path.read_text())
-            return data.get("keys", {}).get(name, "")
-    except (json.JSONDecodeError, OSError):
-        pass
-
-    return ""
-
-
-def write_key_to_mytoolkit(name: str, value: str) -> None:
-    """Write a key into ~/.mytoolkit/config.json (persistent).
-
-    Called by skills when a key is missing and the user provides it.
-    """
-    cfg_path = Path.home() / ".mytoolkit" / "config.json"
-    cfg_path.parent.mkdir(parents=True, exist_ok=True)
-    try:
-        if cfg_path.exists():
-            data = json.loads(cfg_path.read_text())
-        else:
-            data = {}
-        if "keys" not in data:
-            data["keys"] = {}
-        data["keys"][name] = value
-        cfg_path.write_text(json.dumps(data, indent=2, ensure_ascii=False) + "\n")
-    except (json.JSONDecodeError, OSError):
-        data = {"keys": {name: value}}
-        cfg_path.write_text(json.dumps(data, indent=2, ensure_ascii=False) + "\n")