Feature hasn't been suggested before.

• I have verified this feature I'm about to request hasn't been suggested before.

Describe the enhancement you want to request

We used to be able to filter skills in agents' frontmatters via yaml as per below. This was nice, it allowed creating customised agents. As far as I understand, this functionality is now gone.

Filtering from agents files is perfect, it allows for better maintainability. Editing a skill markdown every time an agent is created is... painful. Since skills are a standard that has no frontmatter permission fields, it would be weird to add anything custom to it.

mode: primary
permission:
  skill:
    '*': deny
    plugin-installer: allow
    opencode-config: allow
    command-creator: allow
    skill-creator: allow
    agent-architect: allow
    mcp-installer: allow
    model-researcher: allow
---

ps. pff wrong label, sorry