feat: update

skills/ack/scripts/validate_knowledge.py

@@ -240,20 +240,24 @@ def _validate_registry_target(
 def _tasks_project_root(
     tasks_data: dict[str, Any], tasks_path: Path | None
 ) -> Path | None:
+    inferred = infer_project_root(tasks_path) if tasks_path else None
+    if inferred is not None and inferred.is_dir():
+        return inferred
+
+    # Legacy task boards may still declare repoPath. It is only a fallback for
+    # non-standard layouts; docs/ack location is authoritative when available.
     project = tasks_data.get("project")
     repo_path = project.get("repoPath") if isinstance(project, dict) else None
     if _nonempty(repo_path):
         candidate = Path(repo_path).expanduser()
         if not candidate.is_absolute():
-            inferred = infer_project_root(tasks_path) if tasks_path else None
             if inferred is None:
                 return None
             candidate = inferred / candidate
         if not candidate.is_dir():
             return None
         return candidate.resolve(strict=True)
-    inferred = infer_project_root(tasks_path) if tasks_path else None
-    return inferred if inferred is not None and inferred.is_dir() else None
+    return None
 
 
 def _unknown_keys(value: dict[str, Any], allowed: set[str], where: str) -> list[str]:
@@ -808,8 +812,8 @@ def _validate_knowledge_file_binding(
     binding_root = project_root or declared_root
     if binding_root is None or not binding_root.is_dir():
         errors.append(
-            "[tasks] 无法确定现有项目根目录；请修正 project.repoPath "
-            "或传入 --project-root"
+            "[tasks] 无法从 docs/ack 布局确定现有项目根目录；"
+            "请传入 --project-root"
         )
         return errors
     try:
@@ -1067,7 +1071,7 @@ def main(argv: list[str] | None = None) -> int:
     parser.add_argument("--tasks", help="可选 tasks.yaml，用于跨文件引用校验")
     parser.add_argument(
         "--project-root",
-        help="可选项目根目录；默认从 tasks.project.repoPath 或 docs/ack 布局推断",
+        help="可选项目根目录；默认从 tasks.yaml 的 docs/ack 布局推断",
     )
     args = parser.parse_args(argv)