Design Harness
Evidence-based UI/UX QA harness for AI-made interfaces, with a Claude Code skill adapter.
Retired
Design Harness appears to be discontinued or shut down — repo archived, 0 stars This page is kept as an archive record and is excluded from search engines.
About
An open-source UI/UX QA loop for AI coding agents: point it at a local URL and it captures screenshots, runs conservative source-backed checks (layout, contrast, accessibility, interaction state), and writes an agent-friendly report for the fix loop. The repo ships a Claude Code skill adapter plus an npm CLI (@design-harness/cli) and an agent loop that re-audits until deterministic failures hit zero.
Honest caveat: the repo is archived and has 0 stars, so it may not evolve further — but it has 12 releases, CI, and a real published CLI, so what's there works. Apache 2.0.
What it can do
- Local-URL screenshot audits (desktop + mobile)
- Deterministic layout/a11y/interaction checks with evidence references
- Design-guide contracts (tokens, copy style, budgets)
- Agent loop: audit, fix, re-audit until zero deterministic failures
- CI recipe and PR-comment renderer
Setup
- Install the audit CLI: npx @design-harness/cli@latest audit --url http://localhost:3000 --out runs/demo
- Install Playwright Chromium once: npx playwright install chromium
- Copy the skill adapter: copy adapters/claude-code-skill to .claude/skills/product-ui-designer/
- Run audits and hand report.md + screenshots back to your agent
Prerequisites
Node 20+; Playwright Chromium; a locally running app to audit
Use cases
Works with
Trust score — 5/10
Scored 5/10 (metrics tier, metrics-v1). Evidence: repo is ARCHIVED — maintenance risk, no future evolution expected; 0 stars but 12 releases, CI, and a published npm CLI (@design-harness/cli); evidence-graded findings (deterministic vs heuristic vs review) is a strong design; Apache 2.0. License: Apache-2.0.
★ 0 GitHub stars
How the trust score is built
Full methodology →- Adoption · stars/downloads, log-scaled vs peers
- 3.0/10
- Maintenance · recency, releases, issue load
- 3.0/10
- Openness · license + docs
- 9.0/10
- Manual review · sanity read + red-flag check
- 6.0/10
- · repo is ARCHIVED — maintenance risk, no future evolution expected
- · 0 stars but 12 releases, CI, and a published npm CLI (@design-harness/cli)
- · evidence-graded findings (deterministic vs heuristic vs review) is a strong design
- · Apache 2.0
Sources
Every fact above was checked against these sources. Where a claim comes from the provider and couldn't be independently verified, the text says so.