measure-skills.bash

# ~/.claude/settings.json

  {
    "hooks": {
      "PreToolUse": [{
        "matcher": "Skill",
        "hooks": [{ "type": "command", "command": "~/.claude/hooks/log-skill.sh" }]
      }]
    }
  }

  # ~/.claude/hooks/log-skill.sh
  
  #!/bin/bash
  # stdin is the hook payload: { tool_name, tool_input: { skill, args },
  session_id, ... }
  # matcher already filtered to Skill, so no tool_name check needed

  payload=$(cat)
  skill=$(jq -r '.tool_input.skill' <<< "$payload")
  args=$(jq -r '.tool_input.args // ""' <<< "$payload")

  echo "$(date -u +%s)  $USER   $skill  $args" >> ~/.claude/skill-usage.

I copied this for my local. Thank you for sharing!

@PacoVK hello mate, yes I'm still learning, can you share your marketplace? <3