LeonardSEO

Performance Engineering — Development skill for Claude Code

Development community

Nine focused performance skills and advisory hooks for Codex and Claude Code.

How to install Performance Engineering

This entry records only its repository, not the path inside it, so there is no exact command to give. Open LeonardSEO/performance-engineering and copy the folder into ~/.claude/skills/, or the file into ~/.claude/agents/.

What Performance Engineering does

Nine focused performance skills and advisory hooks for Codex and Claude Code. Framework-independent core, React and React Native guidance.

Alternatives in Development

OpenAI Codex CLI — (Rust implementation) 67.8k ★
Generic Extract Skill — You are an Autonomous 3D Technical Artist Agent 14.1k ★
Zeroshot — Runs coding agents as a graph: one agent implements, independent agents review, failures go to repair, and not 1.9k ★

README

![Performance Engineering: Make fast feel instant. Nine skills, two agents, three advisory hooks and zero runtime dependencies.](assets/banner.svg)

npx plugins add LeonardSEO/performance-engineering

[![Checks](https://github.com/LeonardSEO/performance-engineering/actions/workflows/checks.yml/badge.svg)](https://github.com/LeonardSEO/performance-engineering/actions/workflows/checks.yml) [![Release](https://img.shields.io/github/v/release/LeonardSEO/performance-engineering?color=c4fa75)](https://github.com/LeonardSEO/performance-engineering/releases/latest) [![MIT license](https://img.shields.io/badge/license-MIT-c4fa75)](LICENSE)

**Give your coding agent a performance workflow—from the first request to the final frame.**

Performance Engineering brings nine focused skills to **Codex** and **Claude Code**. Find the bottleneck, choose the relevant guidance, preserve correctness, and verify the result. A framework-independent web/fullstack core covers data, backend work, page loading, assets, feedback and rendering. React/Next.js and React Native get dedicated specialists.

[Install](#install) · [Explore the skills](#nine-skills-one-workflow) · [See the evidence](#measured-and-reviewable) · [Get the release](https://github.com/LeonardSEO/performance-engineering/releases/latest)

Build apps that respond

Useful content sooner. Keep the page shell available and reveal independent sections as they become ready.
Feedback on every interaction. Apply safe optimistic updates, recover from failures, and show truthful progress.
Less avoidable work. Diagnose request waterfalls, N+1 queries, heavy resources and main-thread stalls.
Correctness throughout. Preserve authorization, tenant boundaries, cache scope and write ordering.
Guidance when it matters. Lightweight hooks suggest relevant skills without launching an audit or blocking a tool.