optimize-performance

optimize-performance is a skill for Claude Code from solrac97gr/marketplace-plugins. It costs 6 tokens per session (2,979 once invoked), scanned A, original, no licence file.

An analysis of ways to improve the speed of a React application. React is a JavaScript library for building user interfaces.

In plain words
What is it for?
Examining and optimizing React application performance.
Why use it?
It helps locate and address performance problems that make an application feel slow.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the react-dev plugin — 7 skills, 8 agents shipped together

Good fit Examining and optimizing React application performance.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/solrac97gr/marketplace-plugins/optimize-performance
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add solrac97gr/marketplace-plugins --skill optimize-performance
Clone the repo
git clone --depth 1 https://github.com/solrac97gr/marketplace-plugins

Made for: Claude Code.

Or install react-dev, the plugin that ships this one along with the rest of its 7 skills, 8 agents.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for optimize-performance

README.md
[![agentmods](https://agentmods.dev/badge/skills/solrac97gr/marketplace-plugins/optimize-performance/github.svg)](https://agentmods.dev/skills/solrac97gr/marketplace-plugins/optimize-performance)
Your own site
<a href="https://agentmods.dev/skills/solrac97gr/marketplace-plugins/optimize-performance"><img src="https://agentmods.dev/badge/skills/solrac97gr/marketplace-plugins/optimize-performance/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for optimize-performance

Your own site · 80×15
<a href="https://agentmods.dev/skills/solrac97gr/marketplace-plugins/optimize-performance"><img src="https://agentmods.dev/badge/skills/solrac97gr/marketplace-plugins/optimize-performance.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 6 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,979 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00006 $0.02979
Opus 5.5 $0.00002 $0.01192
Sonnet 5.5 $0.00001 $0.00596
Haiku 4.5 $0.00001 $0.00298

Measured 2mo ago against content hash acf0014963e9, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

optimize-performance scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

plugins/react-dev/skills/optimize-performance/SKILL.md · 446 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2mo ago First seen · 446 lines · 6 tokens per session scan A acf0014963e9

Subscribe to this mod's changes

optimize-performance is a skill published in the GitHub repository solrac97gr/marketplace-plugins (2 stars, last pushed 9mo ago), with no licence file. It adds 6 tokens to every session and 2,979 once invoked, about $0.0000 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Related

optimize-performance compared with skills from other repositories

optimize-performance next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
optimize-performancesolrac97gr/marketplace-pluginsSkill29mo agononeA6Claude Code
build-ghost-appTryGhost/GhostSkill56ktodayMITA44Claude Code, Codex
chakra-ui-builderchakra-ui/chakra-uiSkill41k2d agoMITA214Claude Code, Codex
material-ui-tailwindmui/material-uiSkill99kyesterdayMITA67Claude Code, Codex
fuzzy-rankingTanStack/tableSkill29k4d agoMITA62Claude Code, Codex
r3f-best-practiceszebbern/claude-code-guideSkill4.7ktodayMITA74Claude Code, Codex
git-safetytamagui/tamaguiSkill14kyesterdayMITA0Claude Code