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Skills addyosmani

web-quality-skills Skill collection

Agent Skills for optimizing web quality based on Lighthouse and Core Web Vitals.

Source on GitHubSort and filter them in the skills list

3,058 stars on GitHub, Nov 9, 2026 · 6 skills · 1 bundle

Its bundle

  1. Web Quality Skills

    Bundle of 6 skills
    Use it when:
    You want a website checked and fixed for speed, accessibility, search and security, with measured evidence behind each finding.
    It does:
    Starts with web-quality-audit, one review across every area, then goes deep with one skill per area; each measures, fixes or recommends fixes, and measures again.

    web-quality-audit, performance, core-web-vitals, accessibility, seo, best-practices

    Age
    9 months
    Stars
    3.1K
    bottom 34%
    Total Downloads
    68.4K
    top 16%
    Weekly Downloads
    2.4K
    top 19%

Its skills, most installed first

  1. accessibility

    Part of Web Quality Skills
    Use it when:
    You want a web page or app checked and fixed against WCAG 2.2, the web accessibility standard.
    It does:
    Runs a Lighthouse audit, inspects the accessibility tree, tries the flow by keyboard, edits the code to fix what fails, then audits again.
    type:workfloweffect:localneeds:noneaccessibility
    Age
    9 months
    Stars
    3.1K
    bottom 34%
    Total Downloads
    68.4K
    top 16%
    Weekly Downloads
    2.4K
    top 19%

  2. seo

    Part of Web Quality Skills
    Use it when:
    You want a site's crawlability, page tags, structured data and mobile setup checked and fixed for search engines.
    It does:
    Runs Lighthouse's SEO and Agentic Browsing audits, checks what Lighthouse can't (headers, redirects, robots.txt, sitemap, canonicals), fixes the source and re-runs them.
    type:workfloweffect:localneeds:noneseo
    Age
    9 months
    Stars
    3.1K
    bottom 34%
    Total Downloads
    54.6K
    top 18%
    Weekly Downloads
    1.3K
    top 27%

  3. performance

    Part of Web Quality Skills
    Use it when:
    A site loads slowly or feels sluggish and you want it faster, with numbers to show it.
    It does:
    Sets a baseline from real-user Chrome data (CrUX) and a browser performance trace, changes only the code behind measured bottlenecks, then re-runs the same measurement.
    type:workfloweffect:localneeds:noneperformance
    Age
    9 months
    Stars
    3.1K
    bottom 34%
    Total Downloads
    43.6K
    top 19%
    Weekly Downloads
    1.2K
    top 28%

  4. web-quality-audit

    Only works as part of Web Quality Skills
    Use it when:
    You want one review of a site's quality across speed, accessibility, search, security and how well AI agents can use it.
    It does:
    Records a performance trace and runs Lighthouse audits, uses the failures to find the code responsible, then fixes or recommends fixes and re-runs the checks.
    type:workfloweffect:localneeds:noneperformanceaccessibilityseosecurity
    Age
    9 months
    Stars
    3.1K
    bottom 34%
    Total Downloads
    35.9K
    top 20%
    Weekly Downloads
    1.6K
    top 24%

  5. core-web-vitals

    Only works as part of Web Quality Skills
    Use it when:
    A page's Core Web Vitals fail: the main content appears late (LCP), clicks respond slowly (INP), or the layout jumps (CLS).
    It does:
    Checks real-user Chrome data at the 75th percentile, records a browser trace, reads only the insights for the failing metric, fixes the code behind it and re-measures.
    type:workfloweffect:localneeds:noneperformance
    Age
    9 months
    Stars
    3.1K
    bottom 34%
    Total Downloads
    34.3K
    top 20%
    Weekly Downloads
    1.2K
    top 27%

  6. best-practices

    Part of Web Quality Skills
    Use it when:
    You want a site checked and fixed for the security, compatibility and code-quality problems Lighthouse's Best Practices audit looks for.
    It does:
    Runs Lighthouse's Best Practices audit, inspects the console and network failures, checks dependencies, headers and config, fixes the code and re-runs the audit.
    type:workfloweffect:localneeds:nonesecuritycode-quality
    Age
    9 months
    Stars
    3.1K
    bottom 34%
    Total Downloads
    30.7K
    top 22%
    Weekly Downloads
    967
    top 29%