cross-browser-testing SKILL.md skillA
cross-browser-testing from petrkindlmann/qa-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add petrkindlmann/qa-skills/cross-browser-testing@v2.0Pins v2.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- petrkindlmann/qa-skills
- Path
skills/cross-browser-testing/SKILL.md- Versions recorded
- 5
- Latest version
- v2.0, committed Jun 10, 2026
- First version recorded
- Mar 30, 2026
- Size
- 17,996 bytes
- Repository stars
- 198
- License
- MIT
Design analytics-driven browser test matrices and execute cross-browser tests. Covers BrowserStack/Sauce Labs configuration, Playwright browser channels, common cross-browser CSS/JS divergences, a known-issues documentation log, and progressive enhancement validation. Use when: "cross-browser," "browser matrix," "BrowserStack," "Safari issues," "browser compatibility," "Edge," "works in Chrome but not Safari." Not for: pixel-level baseline strategy and threshold tuning — use visual-testing…
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
<objective> Chrome-only testing gives false confidence: a layout that works in Chromium can break in WebKit, a clipboard call that succeeds in Chrome silently no-ops in Firefox, and a partitioned-cookie flow can pass everywhere except the one engine your users are on. This skill produces an analytics-driven browser matrix, a Playwright (or cloud-platform) config that runs it, and a committed log of known browser divergences — each verified by a test that asserts the user outcome, not the CSS. </objective> ## Quick Route | Situation | Go to | |-----------|-------| | Need to decide *which* browsers to test | Browser Matrix Design | | Already on Playwright, just add browsers | Playwright Browser Configuration → `references/playwright-and-cloud-config.md` | | Need real Safari/Windows/older OS, not engines | Cloud Platform Setup | | One browser misbehaves; want a test for it | Common Cross-Browser Issues + `browserName` branch in `references/testing-patterns.md` | | Need to record a divergence so it is not re-debugged | Known-Issues Log | | Pixel diffs / baseline thresholds | use `visual-testing` | ## Discovery Questions …
Read the whole file at its exact version.
How to install
mdr add petrkindlmann/qa-skills/cross-browser-testing@sha256:fc26ccd876434fc1The line at the top of this page pins the label v2.0, 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_akvq5aep6emieay7)
1 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Mar 30, 2026 and Jun 10, 2026, about one every 18 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v2.0 latest | 2026-06-10 | 60e6483 | 17,996 B | A | view · diff |
| v2.0 | 2026-06-10 | bcd1201 | 17,995 B | A | view · diff |
| v1.0 | 2026-05-30 | d9b4edd | 11,657 B | A | view · diff |
| v1.0 | 2026-05-10 | 11edafd | 19,924 B | A | view · diff |
| v1.0 | 2026-03-30 | 59713a4 | 18,369 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 (17996 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
petrkindlmann/qa-skills · 198 stars · license MIT · pushed 2026-10-21 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_akvq5aep6emieay7 GET https://markdownregistry.com/api/v1/resolve?ref=petrkindlmann/qa-skills/cross-browser-testing GET https://markdownregistry.com/api/v1/blob/fc26ccd876434fc13f4f1ac940565f564ce4ff5d1057b64165d0fadb07be4fbe
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.
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