Prompt

Implement performance budgets for web app.

<current_metrics>
{page load times, bundle sizes}
</current_metrics>

<user_expectations>
{performance goals by user segment}
</user_expectations>

<tech_stack>
{frontend frameworks and tools}
</tech_stack>

Implement:
1. Metric selection and targets
2. Build-time enforcement
3. Runtime monitoring
4. CI/CD integration
5. Alerting rules
6. Optimization playbook