Open source alternatives to core-web-vitals
24 open source AI Skills apps to use instead, best rated first.
Top picks
- G

github-ops
Launchgithub-ops is an agent skill from the ECC collection by affaan-m, listed on skills.sh. It manages a GitHub repository with a focus on community health, CI reliability and the experience of contributors. It covers triaging issues by classify
Open source
- O

opensource-pipeline
Launchopensource-pipeline is an agent skill from the ECC collection by affaan-m, listed on skills.sh. It prepares a private project for safe public release through a three-stage pipeline. The fork stage strips secrets from a copy. The sanitise st
Open source
- A

andrej-karpathy-skills
Launchandrej-karpathy-skills is a single CLAUDE.md file from the multica-ai project that is meant to improve how Claude Code behaves on coding tasks. It is derived from Andrej Karpathy's public observations about LLM coding pitfalls. The file dis
Open source
- M

microsoft/markitdown
Launchmarkitdown-mcp is the MCP server package for MarkItDown, Microsoft's tool for converting many file formats to Markdown for language models. It is a lightweight server that runs over stdio, Streamable HTTP or SSE, and exposes one tool, conve
Open source
- O

od-contribute
Launchod-contribute is an agent skill in the OpenDesign project that provides a guided, one-click contribution flow to the OpenDesign repository, written so that people without a coding background can send a real pull request. It is locked to the
Open source
- G

github-deep-research
Launchgithub-deep-research is an agent skill from the DeerFlow project that researches a single GitHub repository in several rounds and writes a report in Markdown. It is for requests that need more than a README summary, such as a comprehensive
Open source
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Learn Claude Code
by shareAI-lab - A really interesting analysis of how coding agents like Claude
About core-web-vitals

core-web-vitals
Optimize Core Web Vitals (LCP, INP, CLS) for better page experience
core-web-vitals is an agent skill for optimising the three Core Web Vitals, which are largest contentful paint (LCP), interaction to next paint (INP) and cumulative layout shift (CLS). It is aimed at improving the page experience people actually get, so it starts with field data to see the impact on real users before it looks at lab traces to diagnose the causes. Its workflow says to measure before optimising. When a runnable URL is available, the skill reads the performance measurement workflow and prefers page-level Chrome User Experience Report data at the 75th percentile, with a clearly labelled fallback to origin-level data when a page has too little traffic. It then covers each metric in turn. The skill is part of the web-quality-skills repository by Addy Osmani and is added to a compatible agent with the skills command. Its audits passed with Gen Agent Trust Hub, Socket and Snyk. It suits developers who have been asked to fix a slow page and want the fix guided by measured data rather than guesswork.
- Price
- Free
- Made by
- addyosmani
- Category
- AI Skills
- Website
- github.com/addyosmani/web-quality-skills/core-web-vitals











