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Hallmark
Hallmark is a design skill for AI coding assistants that encodes an anti-slop ruleset into workflows.
Hallmark is a design skill for AI coding assistants that encodes typography, colour, layout, motion, and interaction into a holistic ruleset. It provides four explicit verbs including build, study, audit, and redesign to handle different design jobs. Users can build pages, study existing designs via screenshots or URLs to extract structural DNA, audit pages for anti-patterns, or redesign page structures. The tool prevents repeated macrostructures and blocks common AI aesthetics like purple gradient heroes and centred layouts. It is built by Together AI and integrates with Claude Code, Cursor, and Codex.
Hallmark at a glance
- Best for: Software engineer, Designer
- Runs on: Claude Code, Cursor, Codex, API
- Pricing: Free
- Released: April 2026
- Category: AI coding tool
- Website: usehallmark.com
Key features
- Builds pages from briefs
- Studies design screenshots and URLs
- Audits pages for design anti-patterns
- Redesigns page structures
- Generates portable design specs
- Prevents repeated macrostructures
- Uses OKLCH palettes
Use it for
- Building landing pages without AI slop
- Auditing existing code for anti-patterns
- Studying design structures from screenshots
- Redesigning pages with new structural bones
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