Skill runner should be handled separately

Summary

Skill runner is very annoying, no access to ~/.commandcode/skills on the agent. Too many access requests.

Expected Behavior

Seamless skill runs managed by the harness and not by LLM.

Actual Behavior

For some reason it skill calls fall back to bash cat ...,

 SHELL  [echo "===== to-spec ====="; cat ~/.commandcode/skills/to-spec/SKILL.md; echo; ls ~/.commandcode/skills/to-spec/]
 │ ===== to-spec =====
 │ ---
 │ name: to-spec

Steps to reproduce the issue

Call a skill in cmd from ~/.commandcode that calls other skills.

Command Code Version

1.38.2

Operating System

macOS

Terminal/IDE

VSCode

Shell

zsh

Session file (optional)

No response

Fix prompt (optional)

No response

Additional context

OS: macOS 27.0

まず、~/.commandcode 内の cmd からのネストされた skill 呼び出しを再現し、skill 呼び出しが cat のような shell コマンドにフォールバックする箇所を調べます。完了条件は、ネストされた呼び出しを含め、skill が harness によって処理され、アクセス要求の繰り返しや LLM が生成した shell 読み取りが発生しないことです。