performance-budget-guard

Monitor bundle size and Core Web Vitals metrics during development, blocking deployments that exceed performance budgets with detailed reports. Automatically analyzes Next.js build output, checks bundle sizes against predefined budgets,…

Automations
Performance
179

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-budget-guard.md -o .claude/hooks/performance-budget-guard.json

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

Content

{
  "description": "Monitor bundle size and Core Web Vitals metrics during development, blocking deployments that exceed performance budgets with detailed reports. Automatically analyzes Next.js build output, checks bundle sizes against predefined budgets, and provides optimization recommendations. Hook triggers on PostToolUse for build-related operations and file changes that could affect performance.",
  "hooks": {
    "PostToolUse": [
      {
        "matcher": "Bash",
        "hooks": [
          {
            "type": "command",
            "command": "bash -c 'input=$(cat); COMMAND=$(echo

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