Audit an existing page with Hallmark
Install Hallmark and audit before redesigning, with separate requirements for browser checks.
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Hallmark can audit an existing page before changing it, according to its README [1]. I would use that report to choose a specific design problem before asking for a redesign.
Install the skill
The README documents this global installation, requiring Node 18 or later. It installs across projects; omit -g for the current project only [1].
npx skills add nutlope/hallmark -gFor Claude Code, the documented install location is ~/.claude/skills/hallmark. Other supported agents have their own invocation conventions [1].
Audit the existing page
Run this in Claude Code, replacing the example path with your page. The README says audit reports findings without redesigning [1].
/hallmark audit ./index.htmlYou should get a report to review before requesting edits. Hallmark's skill instructions give an existing root design document priority, followed by the project's established visual choices [2]. Keep your approved design rules available to the agent.
Enable browser checks when needed
The README says rendered checks need Chrome and this package. Static checks remain available without them [1].
npm i -g puppeteer-coreRequest a redesign deliberately
Use the README's redesign command when you want changes [1].
Warning: This requests edits to your page. Keep a recoverable copy of your work before running it.
/hallmark redesign ./src/appThe README describes preserving content and behavior while changing layout and appearance [1]. Check the resulting links and forms yourself before accepting the result. Your audit gives you specific findings to compare against that revision.
Keep this guide
Filed under Claude Code, Dev tools