Synthetic UX testing
Project description
ux-swarm
Point a swarm of synthetic users at any URL or screenshot, give them a task, and see their completion rate and pain points.
Highlights
- Instant testing - simulate 20 users in under a minute; no scheduling, no interviews
- Repeatable - run before and after a deploy to track whether completion rate improved
- Real signal - not a replacement for user testing, but genuine findings at a fraction of the cost and time
- Customizable personas - define your own user types and weight the swarm to match your real audience
- Accessibility included - screen reader personas ship out of the box
Overview
ux-swarm is a CLI tool for synthetic UX testing built for frontend developers who want fast, quantifiable signal during development or after launch. Share a URL or screenshot, give it a task, watch a swarm of distinct user personas try to execute it, and review completion rates, feedback, and ranked pain points.
Two modes: browser swarm sends each agent into a live Playwright session to navigate a site step-by-step — good for flows like signup, checkout, or cancellations. Screenshot swarm runs faster and cheaper, using LLM vision to evaluate an image or UI — perfect for quick reviews and mockups before you have a live URL.
Authors
Built by @masonomara at O'Mara Technology.
Usage
# browser swarm — live URL
swarm https://example.com complete the checkout flow
# screenshot swarm — image or mockup
swarm mockup.png find where to contact support
# limit agents or steps
swarm https://example.com create an account --users 10 --max-steps 5
Installation
npm
npm install -g ux-swarm
swarm config
pip
pip install ux-swarm
swarm config
uv
uv tool install ux-swarm
swarm config
Requires Python 3.11+. The npm package installs the Python tool underneath — Python must be present on your system. swarm config walks through provider selection, API key, model, and Playwright setup on first run.
Feedback and Contributing
Found a bug or have a feature request? Open an issue. For questions or ideas, start a Discussion.
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