web-perf SKILL.md skillA
web-perf from swyxio/skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add swyxio/skills/web-perf@git:20260822.a6cb86fPins git:20260822.a6cb86f in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- swyxio/skills
- Path
web-perf/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260822.a6cb86f, committed Aug 22, 2026
- First version recorded
- Aug 5, 2026
- Size
- 4,522 bytes
- Repository stars
- 176
- License
- MIT
Measure, diagnose, or review web page performance when page speed, Core Web Vitals, Lighthouse performance, loading behavior, or a named performance regression is the primary task. Use current browser evidence and first-party documentation. Do not turn a focused metric investigation into a full performance, accessibility, bundler, and codebase audit.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Web Performance Use current browser evidence for the page and state the user named. Metrics, thresholds, and tooling change; retrieve current web.dev or Chrome documentation before citing specific thresholds or API details. ## Set the acceptance scope Choose the smallest mode that answers the request: - **Named regression or metric:** measure that path and analyze its likely contributors. - **General performance audit:** capture representative load evidence, rank the material issues, and stop when the highest-impact causes are explained. - **Optimization work:** establish a comparable baseline, change only the authorized code, and remeasure the same page, viewport, network conditions, and cache state. The user outcome and performance risk created by the proposed change define the gates. Accessibility, generic code quality, every bundler setting, and every available DevTools insight are separate concerns unless the request or evidence makes one relevant. A discovered non-blocking improvement is a follow-up, not a release prerequisite. ## Choose available evidence Prefer a browser tool that can record a performance trace and inspect network …
Read the whole file at its exact version.
How to install
mdr add swyxio/skills/web-perf@sha256:d6ff74a38231b92dThe line at the top of this page pins the label git:20260822.a6cb86f, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_c2pbblvjtp6d2v6j)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Aug 5, 2026 and Aug 22, 2026, about one every 16 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260822.a6cb86f latest | 2026-08-22 | a6cb86f | 4,522 B | A | view · diff |
| git:20260805.87b9536 | 2026-08-05 | 87b9536 | 8,198 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (4522 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
swyxio/skills · 176 stars · license MIT · pushed 2026-10-21 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_c2pbblvjtp6d2v6j GET https://markdownregistry.com/api/v1/resolve?ref=swyxio/skills/web-perf GET https://markdownregistry.com/api/v1/blob/d6ff74a38231b92d25d19001cb8fa75a94a071366ecbae90bfebcd69c54cfac8
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.