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Get Started Free →Use when reviewing CI coverage, automated checks, or test strategy related to Test across all major browsers. Focus on whether the rule is continuously verified, not just documented.
.claude/skills/thedaviddias-cross-browser-testing/SKILL.md| Test case | Without → With | Effect | Δ tokens | Δ turns |
|---|---|---|---|---|
| case-01 | ✗→✓ | ▲ Improved | 1% | 0% |
| case-09 | ✓→✓ | ＝ Same ✓ | 3% | 0% |
| case-02 | ✓→✓ | ＝ Same ✓ | 7% | 0% |
| case-03 | ✓→✓ | ＝ Same ✓ | 4% | 0% |
| case-04 | ✓→✓ | ＝ Same ✓ | 0% | 0% |
Users access your site from different browsers, each with unique rendering engines. Without cross-browser testing, a significant portion of users may experience broken layouts, missing features, or complete failures.
Verify that this website works correctly across major browsers (Chrome, Firefox, Safari, Edge).
Fix browser-specific issues and ensure consistent experience across different browsers.
Explain the importance of testing across browsers to ensure all users have a good experience.
Review tests, CI workflows, and enforcement points related to Test across all major browsers. Flag exact gaps where the rule is not automatically verified or where failures do not block regressions.
For full implementation details, code examples, and framework-specific guidance, see references/rule.md.
Rule page: https://frontendchecklist.io/en/rules/testing/cross-browser-testing
| Case | Status | Duration (ms) | Turns | Tokens | Tool calls | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Without | With | Δ | Without | With | Δ | Without | With | Δ | Without | With | Δ | ||
case-09 | pass→pass | 11,810 | 10,713 | -9% | 1 | 1 | 0% | 1,973 | 2,029 | +3% | 0 | 0 | — |
case-01 | fail→pass | 12,119 | 10,738 | -11% | 1 | 1 | 0% | 2,015 | 2,038 | +1% | 0 | 0 | — |
case-02 | pass→pass | 13,298 | 13,056 | -2% | 1 | 1 | 0% | 2,567 | 2,737 | +7% | 0 | 0 | — |
case-03 | pass→pass | 2,768 | 1,967 | -29% | 1 | 1 | 0% | 553 | 575 | +4% | 0 | 0 | — |
case-04 | pass→pass | 15,930 | 14,185 | -11% | 1 | 1 | 0% | 2,448 | 2,451 | +0% | 0 | 0 | — |
case-05 | pass→pass | 12,335 | 10,170 | -18% | 1 | 1 | 0% | 2,066 | 2,013 | -3% | 0 | 0 | — |
case-06 | pass→pass | 8,852 | 5,922 | -33% | 1 | 1 | 0% | 1,757 | 1,312 | -25% | 0 | 0 | — |
case-07 | pass→pass | 14,413 | 9,237 | -36% | 1 | 1 | 0% | 2,289 | 2,087 | -9% | 0 | 0 | — |
case-08 | pass→pass | 12,214 | 9,477 | -22% | 1 | 1 | 0% | 2,088 | 1,783 | -15% | 0 | 0 | — |
case-10 | pass→pass | 10,549 | 6,840 | -35% | 1 | 1 | 0% | 2,323 | 1,757 | -24% | 0 | 0 | — |
case-11 | pass→pass | 11,487 | 7,563 | -34% | 1 | 1 | 0% | 1,914 | 1,370 | -28% | 0 | 0 | — |
case-12 | pass→pass | 6,702 | 2,543 | -62% | 1 | 1 | 0% | 1,210 | 670 | -45% | 0 | 0 | — |
case-13 | pass→pass | 15,752 | 7,327 | -53% | 1 | 1 | 0% | 2,516 | 1,676 | -33% | 0 | 0 | — |
case-14 | pass→pass | 11,842 | 10,899 | -8% | 1 | 1 | 0% | 2,097 | 2,076 | -1% | 0 | 0 | — |
case-15 | pass→pass | 12,668 | 13,612 | +7% | 1 | 1 | 0% | 2,176 | 2,284 | +5% | 0 | 0 | — |
case-16 | pass→pass | 11,171 | 9,862 | -12% | 1 | 1 | 0% | 2,055 | 1,948 | -5% | 0 | 0 | — |
case-17 | pass→pass | 11,421 | 11,998 | +5% | 1 | 1 | 0% | 2,062 | 2,244 | +9% | 0 | 0 | — |
case-18 | pass→pass | 12,021 | 6,485 | -46% | 1 | 1 | 0% | 1,975 | 1,629 | -18% | 0 | 0 | — |
case-19 | pass→pass | 11,307 | 9,834 | -13% | 1 | 1 | 0% | 1,900 | 1,929 | +2% | 0 | 0 | — |
case-20 | pass→pass | 18,758 | 16,022 | -15% | 1 | 1 | 0% | 3,764 | 3,921 | +4% | 0 | 0 | — |
case-21 | pass→pass | 5,489 | 4,183 | -24% | 1 | 1 | 0% | 1,007 | 1,045 | +4% | 0 | 0 | — |
case-22 | pass→pass | 7,121 | 6,541 | -8% | 1 | 1 | 0% | 1,437 | 1,802 | +25% | 0 | 0 | — |
DecimalAI ran this skill against gemini-3.6-flash twice over the same eval suite — once with the skill loaded and once without — and compared the two runs case by case. 22 cases were attempted. The headline lift of +5 percentage points is the difference between those two pass rates over the 22 comparable cases.
Without the skill loaded, the model failed this case. With it loaded, the same prompt on the same model passed. This is one improved case from the latest verified run; every case, including any that regressed, is in the table above.
Other measured skills in the registry, with their headline benchmark lift.