claude

qa-visual-regression

Visual regression testing with Percy, Chromatic, Playwright screenshots and Storybook, plus chart rendering tests for Chart.js, D3 and Vega. Covers responsive breakpoint matrices, baseline conventions, and a binding baseline gate. Agents (visual-diff-classifier, visual-baseline-curator) sort diffs into intentional, incidental or regression and propose an initial baseline set.

13 on GitHubby testlandv1.4.5MITupdated yesterdayquality-engineering
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Plugin qa-visual-regression from marketplace testland-qa in testland/qa. Commands read from the repo's manifest — today.

What it installs

Skills (7)

  • chart-render-tests

    Use when a dashboard renders charts that need regression tests, before a chart library upgrade or after a theme change. Canvas charts (Chart.js) get screenshot and toDataURL diffs, SVG (D3) gets normalized structure snapshots, and Vega or Vega-Lite specs get schema and compile checks.

  • chromatic-visual-regression-testing

    Use when visual regression tests run on Chromatic Cloud for Storybook, Playwright or Cypress: the chromatic CLI, baselines, TurboSnap, UI Review, CI gating and reading exit codes to tell visual changes from errors.

  • percy-visual-regression-testing

    Use when visual regression tests run on BrowserStack Percy: @percy/cli with the Playwright, Cypress, Selenium or Storybook SDK, percy exec, viewports, masks and ignored regions, and reviewing diffs in Percy builds.

  • playwright-snapshots

    Use when a project wants self-hosted visual regression tests in Playwright with no external service: toHaveScreenshot assertions, masks, clips and thresholds, per-OS and per-browser snapshot folders, --update-snapshots, and a viewport matrix across responsive breakpoints.

  • storybook-visual-regression-testing

    Use when a repo already has Storybook and wants a visual test per story: the hosted Chromatic addon, or the self-hosted Storybook test-runner with a postVisit hook calling Playwright's toHaveScreenshot, plus CI setup.

  • visual-baseline-conventions

    Use when planning or auditing visual regression coverage: which stories or pages get baselines, which breakpoints, masking vs thresholds, when to add or drop a baseline, and how to choose between Percy, Chromatic, Playwright and Storybook test-runner.

  • visual-baseline-gate

    Use when visual diffs are already classified and CI needs one binding go/no-go: blocks on regressions or on intended baseline changes without sign-off from a reviewer who is not the author, fails closed when the classifier did not run, and writes visual-gate.json and .md.

Subagents (2)

  • visual-baseline-curator

    Use proactively whenever a project starts visual regression testing or its baseline set needs an audit. Proposes a coverage-optimal baseline set for Storybook or app pages and writes the Chromatic, Percy, Playwright or Storybook test-runner config.

  • visual-diff-classifier

    Use proactively whenever a Percy, Chromatic or Playwright visual build is about to be accepted. Classifies each diff as intentional, incidental or regression with a reason and action, and on large builds clusters diffs by component or route so reviewers check the right screenshots.

View source on GitHub testland.io

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