Detect broken theme toggles and missing persistence on web pages.
npx skills add https://github.com/Luqman-Ud-Din/blackbox-qa-agent --skill qa-test-theme
Please help me install this Agent Skill. Skill: qa-test-theme Source: https://github.com/Luqman-Ud-Din/blackbox-qa-agent/tree/main/skills/qa-test-theme Command: npx skills add https://github.com/Luqman-Ud-Din/blackbox-qa-agent --skill qa-test-theme
This Skill checks whether a site’s dark or light theme control actually changes the page appearance and whether that preference is saved for future visits.
Use the qa-test-theme skill to inspect the current page for a theme toggle, verify that it changes the theme, and report whether the preference persists.
High-intent search queries and answers about installing and using this skill.
To verify dark mode persistence, an in-page probe toggles the theme, inspects visual attributes, and checks if the preference is saved to localStorage or cookies before reloading the page to confirm the state survives.
Theme persistence testing checks whether a site’s dark or light mode control actually changes visual state and saves that preference to durable storage like localStorage or cookies for future visits and sessions.
Testing light and dark mode controls on desktop viewports requires clicking the theme toggle, comparing visual attributes to confirm the page state updates, and inspecting theme-related storage to ensure the preference is recorded.
Yes, theme toggle testing restores the original theme after verifying the dark or light mode control updates the page state and successfully writes the preference to durable storage such as cookies or localStorage.
A UI theme toggle might change visual attributes but fail to save because the web page lacks the logic to write the preference to durable storage like localStorage or cookies, meaning the state will not survive reloads.
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