How do I install the Ttfb skill?

Run npx skillmds@latest add thedaviddias/ttfb in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

What does the Ttfb skill do?

Use when auditing slow first responses on SSR pages, APIs, or cacheable HTML. Distinguish origin compute time from network latency and CDN cache misses before proposing a fix. It is listed under Web & Frontend on SkillMD.

This skill has not completed SkillMD's automated safety review yet. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Ttfb?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

thedaviddias (@thedaviddias) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Ttfb by thedaviddias — Agent Skill

Name: Ttfb
Author: thedaviddias

File contents

Reduce Time to First Byte (TTFB)

TTFB is the foundation of page performance; if the server is slow to respond, all subsequent loading stages are delayed.

Quick Reference

Optimize server-side logic and database queries to speed up response generation
Use a Content Delivery Network (CDN) to serve content closer to users
Implement effective caching strategies at the server and edge levels

Check

Review the page's TTFB and identify any bottlenecks in the server-side processing or network transmission.

Fix

Optimize the server's response time by improving database queries, caching responses, and using a CDN.

Explain

Explain how TTFB impacts the entire page load process and why it is a critical starting point for performance optimization.

Code Review

Review server-rendered routes, API handlers, cache configuration, and database access on the critical path. Flag uncached HTML, slow synchronous work before the first byte, repeated upstream fetches, or expensive queries that keep TTFB above roughly 800ms.

For full implementation details, code examples, and framework-specific guidance, see references/rule.md.

Rule page: https://frontendchecklist.io/en/rules/performance/ttfb

Frequently asked questions

Ttfb