feat: add explicit ack workflow skill

tests/test_ack_skill.py

@@ -0,0 +1,35 @@
+from __future__ import annotations
+
+import unittest
+from pathlib import Path
+
+
+REPO_ROOT = Path(__file__).resolve().parents[1]
+
+
+class AckSkillContentTests(unittest.TestCase):
+    def test_ack_skill_routes_to_kit_without_modifying_agent_instructions(self) -> None:
+        content = (REPO_ROOT / "skills" / "ack" / "SKILL.md").read_text(encoding="utf-8")
+
+        for expected in (
+            "skiff kit init ack --project <project-root>",
+            "docs/ack/project.md",
+            "docs/ack/tasks.yaml",
+            "tasks: []",
+            "validate_tasks.py",
+            "不要修改项目的 `AGENTS.md`",
+            "当前会话担任 Coordinator",
+        ):
+            self.assertIn(expected, content)
+
+    def test_ack_skill_is_explicit_only(self) -> None:
+        metadata = (REPO_ROOT / "skills" / "ack" / "agents" / "openai.yaml").read_text(
+            encoding="utf-8"
+        )
+
+        self.assertIn('display_name: "ACK"', metadata)
+        self.assertIn("allow_implicit_invocation: false", metadata)
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/test_project_skill.py

@@ -19,6 +19,8 @@ class ProjectSkillContentTests(unittest.TestCase):
             "skiff check <name>",
             "~/.skills/skills/<name>/",
             "第三方 skill",
+            "skiff kit init ack",
+            "显式调用全局 `/ack` skill",
         ):
             self.assertIn(expected, content)