SKILL.md should clarify mgrep is a global CLI command, not an executable in the skill directory

[s0up4200]

Problem

When Claude Code loads the mgrep skill, it displays:

Base directory for this skill: /Users/.../.claude/plugins/cache/Mixedbread-Grep/mgrep/0.0.0/skills/mgrep

This can mislead AI agents into thinking they need to cd into the skill directory and run ./mgrep, which fails with "no such file or directory" since the skill directory only contains SKILL.md.

Example of the failure

⏺ Bash(cd /Users/soup/.claude/plugins/cache/Mixedbread-Grep/mgrep/0.0.0/skills/mgrep && ./mgrep --web --answer "query")
  ⎿  Error: Exit code 127
     (eval):1: no such file or directory: ./mgrep

Suggested fix

Add a note to SKILL.md clarifying that mgrep is a globally installed CLI command. Something like:

## Important

`mgrep` is a globally installed CLI command. Run it directly from any directory:

\`\`\`bash
mgrep "query"
\`\`\`

If unsure where it is installed, run `which mgrep` to find its path.

Do NOT attempt to run `./mgrep` from this skill directory - this directory only contains documentation.

This would prevent agents from misinterpreting the "Base directory for this skill" message.