refactor: to_prompt_block剥离frontmatter冗余(目录层已展示name/description)

pipeline_core/skill_loader.py

@@ -102,10 +102,16 @@ class Skill:
 
     def to_prompt_block(self) -> str:
         scope_tag = SCOPE_TAG.get(self.scope, self.scope)
+        body = self.content
+        # 剥离 frontmatter（--- 之间），只保留正文，避免 name/description 与目录层重复
+        if body.startswith("---"):
+            end = body.find("---", 3)
+            if end != -1:
+                body = body[end + 3:].strip()
         return f"""## [{scope_tag}] {self.name}
 {self.description}
 
-{self.content}
+{body}
 """