Hallmark
Agent skill for Claude Code, Codex, Cursor and OpenCode that builds web pages from 50 themes and lints them in a browser for tells of AI-made design.
Hallmark (v2, no tagged releases, ~35k stars), made by Together AI, is a design skill for Claude Code, Codex, Cursor and OpenCode. It offers three of 50 themes per prompt, builds self-contained HTML and CSS pages around what the page is for, picks openly licensed photos with credits, and runs sloplint at eight widths against common AI design tells; /hallmark redesign and audit work on existing pages. Install with npx skills add or as a Claude Code plugin; needs Node 18, and browser checks need puppeteer-core and Chrome. MIT. Needs a coding agent with its own plan or API key.
The facts
| Question | Answer | Source | Checked |
|---|---|---|---|
| Runs on my machine? | Yes. Yes, the agent writes self-contained HTML and CSS pages locally; photos are referenced from Wikimedia Commons | github.com | Checked 8 days ago |
| Code licence | Open source. MIT | github.com | Checked 10 days ago |
| Commercial use | Yes. Yes, MIT; photos it picks keep their own CC0, public domain, CC BY or CC BY-SA licences and are credited | github.com | Checked 8 days ago |
| Paid services needed? | Required. Needs an AI coding agent (Claude Code, Codex, Cursor or OpenCode), which needs a paid plan or API key | github.com | Checked 8 days ago |
| Hardware | No hardware needs of its own; an agent skill with Node scripts that runs wherever the host agent runs (Node 18+, Chrome for browser checks) | github.com | Checked 8 days ago |
| Operating systems | Wherever the host agent and Node 18 run; no supported OS list is stated | github.com | Checked 8 days ago |
| Setup effort | Easy, one npx command or a Claude Code plugin install; browser checks also need puppeteer-core and Chrome | github.com | Checked 8 days ago |
Each fact has its own date. Unknown means nobody has published it. We read their documentation; we didn’t install it. Running it yourself costs your hardware, electricity and setup time. Report a correction.
No licence changes since we started watching. Licence changes: follow Hallmark and we email you if its terms change.
Stars over time
Building history +9,635 this week; not enough baseline history. Stars show attention, not quality. Where these numbers come from.