performance-monitor

Monitor system performance during Claude Code operations. Tracks CPU, memory usage, and execution time for performance optimization.

Automations
Performance
409

What it does and how to use it

A hook that automates performance actions at key moments (before/after a tool runs, on save, etc.), without you having to think about it.

Install the hook (command above).
It runs automatically on the defined events.
Adjust the rules in the settings file if you want to fine-tune it.

Install (Claude Code)

mkdir -p .claude/hooks && curl -fsSL https://doutorai.pt/data/lib/hooks__performance-monitor.md -o .claude/hooks/performance-monitor.json

Paste this command into the terminal, in your project folder, and the component installs automatically.

Content

{
  "description": "Monitor system performance during Claude Code operations. Tracks CPU, memory usage, and execution time for performance optimization.",
  "hooks": {
    "PreToolUse": [
      {
        "matcher": "*",
        "hooks": [
          {
            "type": "command",
            "command": "echo \"$(date +%s.%N),$(ps -o %cpu= -p $$),$(ps -o rss= -p $$),$CLAUDE_TOOL_NAME,start\" >> ~/.claude/performance.csv"
          }
        ]
      }
    ],
    "PostToolUse": [
      {
        "matcher": "*",
        "hooks": [
          {
            "type": "command",
            "command": 

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