feat: rename skills/skiff to pouch and move ACK state under .pouch

Use ~/.pouch, the pouch CLI, and .pouch.yaml as the SSOT container.
Keep the inner skills/ packages, and store ACK project state in
.pouch/ack instead of docs/ack.

skills/deployer/scripts/deploy/lib.py

@@ -3,7 +3,7 @@
 
 支持两种布局：
 1. 独立配置中心仓库（DEPLOYER_ROOT 指向，或 skill 安装位置）
-2. 项目内环境目录 .skiff/deployer/{prod,test,dev}/（从 CWD 自动发现）
+2. 项目内环境目录 .pouch/deployer/{prod,test,dev}/（从 CWD 自动发现；兼容 .skiff/deployer）
 """
 
 from __future__ import annotations
@@ -18,10 +18,11 @@ DEFAULT_BASE_PATH = "/opt/app"
 DEFAULT_SYNC_EXCLUDES = ("data", "_data")
 _SKILL_DIR = Path(__file__).resolve().parent.parent  # scripts/
 PROJECT_ROOT: Path | None = None
+_PROJECT_LAYOUT_DIRS = (".pouch", ".skiff")
 
 
 def _find_project_root() -> Path:
-    """部署根：DEPLOYER_ROOT > 从 CWD 向上找 .skiff/deployer > skill 安装位置。"""
+    """部署根：DEPLOYER_ROOT > 从 CWD 向上找 .pouch/deployer > skill 安装位置。"""
     env = os.environ.get("DEPLOYER_ROOT", "").strip()
     if env:
         p = Path(env).expanduser().resolve()
@@ -31,9 +32,10 @@ def _find_project_root() -> Path:
         return p
     cur = Path.cwd()
     while True:
-        cand = cur / ".skiff" / "deployer"
-        if cand.is_dir():
-            return cand
+        for dirname in _PROJECT_LAYOUT_DIRS:
+            cand = cur / dirname / "deployer"
+            if cand.is_dir():
+                return cand
         if cur == cur.parent:
             break
         cur = cur.parent
@@ -48,13 +50,13 @@ def project_root() -> Path:
 
 
 def in_project_layout(root: Path | None = None) -> bool:
-    """部署根是否为某项目内的 .skiff/deployer/。"""
+    """部署根是否为某项目内的 .pouch/deployer/。"""
     root = root or project_root()
-    return root.name == "deployer" and root.parent.name == ".skiff"
+    return root.name == "deployer" and root.parent.name in _PROJECT_LAYOUT_DIRS
 
 
 def project_display_name(root: Path | None = None) -> str:
-    """项目名：git 仓库名优先，否则 .skiff 的父目录名。"""
+    """项目名：git 仓库名优先，否则 .pouch 的父目录名。"""
     root = root or project_root()
     anchor = root.parent.parent if in_project_layout(root) else root
     try:
@@ -111,7 +113,7 @@ def load_config(config_path: os.PathLike | str, *, required: bool = True) -> dic
 def config_paths_for_service(service_dir: str) -> list[Path]:
     """收集部署根自身及服务目录各层 _config.yaml（祖先在前，服务目录在后）。
 
-    部署根的 _config.yaml（如 .skiff/deployer/_config.yaml）作为全局默认，
+    部署根的 _config.yaml（如 .pouch/deployer/_config.yaml）作为全局默认，
     对所有环境/服务生效。
     """
     root = project_root()
@@ -333,7 +335,7 @@ def service_info(service_dir: str, *, strict: bool = True) -> dict | None:
 def is_deployable_dir(path: Path, root: Path) -> bool:
     if "unused" in path.parts or "__pycache__" in path.parts:
         return False
-    if ".skiff" in path.parts and root.name != "deployer":
+    if any(part in _PROJECT_LAYOUT_DIRS for part in path.parts) and root.name != "deployer":
         return False
     if not (path / "compose.yaml").is_file():
         return False