feat(agent-runner): expose skill resources through host context

src/langbot/pkg/skill/manager.py

@@ -93,50 +93,3 @@ class SkillManager:
     def get_skill_by_name(self, name: str) -> dict | None:
         """Get skill data by name."""
         return self.skills.get(name)
-
-    def get_skill_index(self, bound_skills: list[str] | None = None) -> str:
-        """Render the pipeline-visible skills as a short ``name: description``
-        index suitable for the system prompt.
-
-        ``bound_skills`` follows the same convention as
-        ``query.variables['_pipeline_bound_skills']``: ``None`` means every
-        loaded skill is exposed; an explicit list filters to that subset.
-        Returns an empty string when no skills are visible.
-        """
-        lines: list[str] = []
-        for skill in self.skills.values():
-            name = skill.get('name')
-            if not name:
-                continue
-            if bound_skills is not None and name not in bound_skills:
-                continue
-            display = skill.get('display_name') or name
-            description = (skill.get('description') or '').strip().replace('\n', ' ')
-            lines.append(f'- {name} ({display}): {description}')
-
-        if not lines:
-            return ''
-        return 'Available Skills:\n' + '\n'.join(lines)
-
-    def build_skill_aware_prompt_addition(self, bound_skills: list[str] | None = None) -> str:
-        """Build the system-prompt addendum that makes the LLM aware of the
-        pipeline-visible skills.
-
-        Only metadata (name + description) is injected — the full SKILL.md is
-        loaded later via the ``activate`` Tool Call, protecting KV cache and
-        matching Claude Code's progressive disclosure pattern. Returns an
-        empty string when no skills are visible (no prompt change at all).
-        """
-        skill_index = self.get_skill_index(bound_skills)
-        if not skill_index:
-            return ''
-        return (
-            '\n\n'
-            f'{skill_index}\n\n'
-            "When the user's request clearly matches one or more skills "
-            'based on their descriptions above, call the `activate` tool with '
-            'the skill name to load its full instructions. Only the name and '
-            'description are visible here; the actual instructions arrive as '
-            'the tool result. If no skill is a clear match, respond normally '
-            'without activating any skill.'
-        )