修改了nanobot，往Hermes agent的风格走，进度1/3

app-instance/backend/beaver/skills/resolver/runtime.py

@@ -0,0 +1,50 @@
+"""Runtime skill resolver。
+
+这层负责回答一个运行时问题：
+“这一次调用，哪些 skill 要被激活，并以什么形式注入上下文？”
+
+第一版保持保守，只综合三类来源：
+1. `always` skills
+
+不在这里做复杂的语义匹配或自动推荐。
+"""
+
+from __future__ import annotations
+
+from dataclasses import dataclass, field
+
+from beaver.engine.context import SkillContext
+from beaver.skills.catalog.loader import SkillsLoader
+from beaver.skills.catalog.utils import strip_frontmatter
+
+
+@dataclass(slots=True)
+class ResolvedSkillSet:
+    """一次运行最终解析出的 skills 结果。"""
+
+    activated_skills: list[SkillContext] = field(default_factory=list)
+
+
+class RuntimeSkillResolver:
+    """把 profile/request 转成当前轮次真正激活的 skill 集合。"""
+
+    def __init__(self, loader: SkillsLoader) -> None:
+        self.loader = loader
+
+    def resolve(
+        self,
+    ) -> ResolvedSkillSet:
+        selected: list[str] = []
+        for name in self.loader.get_always_skills():
+            if name not in selected:
+                selected.append(name)
+
+        activated_skills: list[SkillContext] = []
+        for name in selected:
+            raw_content = self.loader.load_skill(name)
+            content = strip_frontmatter(raw_content).strip() if raw_content else ""
+            if not content:
+                continue
+            activated_skills.append(SkillContext(name=name, content=content))
+
+        return ResolvedSkillSet(activated_skills=activated_skills)