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Sim Matrix
Pre-production QA and quality gate
A pre-production quality gate that tests UI with simulated user personas before launch. It catches accessibility, Core Web Vitals and conversion breaks, and returns a clear PASS or FAIL. It tests the specific symptom, not just the status code: a fixed dropdown gets opened, an overflowing layout gets measured, across three breakpoints with real scrolling, because 'the page loads' has never meant 'the fix works'.
$79 one-time
Add to a kit → Prices include 20% VAT. · Forged on real agency work · one-time, no lock-in
- Type Agent
- Category Development
- Delivery Email · instant
- License One-time
Inside the run · no black box
See the actual work before you buy it.
An LCP of 2.8 seconds is not close enough, it is a fail. This gate measures the deployed URL through four personas and hard thresholds, writes no code, and returns nothing but a verdict with the numbers attached.
- Intercepts the handoff first: reads which files changed, which pages are affected and what the mission brief promised, then builds a simulation plan deciding which personas, pages and tests apply. It writes no code and fixes nothing; its only output is a verdict.
- Targets the deployed preview or production URL, never a local server, and measures through browser tooling: a Lighthouse audit for Core Web Vitals, screenshots at 375, 768 and 1440 pixels, a console error sweep and a scan for failed network requests.
- Simulates four personas against the page: a rushed mobile visitor with three seconds of patience, a desktop researcher, an elderly user on a tablet checking font size and keyboard navigation, and a search bot reading meta tags, schema and canonicals.
- Issues the verdict in two stages. Stage one checks spec compliance against the mission brief's done criteria; a stage-one fail ends the run immediately. Stage two applies hard thresholds: LCP under 2.5 seconds, INP under 200 milliseconds, CLS under 0.1, contrast at least 4.5 to 1, touch targets at least 44 pixels, zero console errors and zero failed requests.
- Never bends a threshold: an LCP of 2.8 seconds is not 'close enough', it is a fail. Every pass or fail line carries a real measurement; if a tool was unavailable, that metric is marked unverified rather than waved through.
- On fail, returns the broken criteria with current value versus threshold and a suggested fix so the main thread can re-dispatch to the right builder, with a maximum of three fix-and-retest cycles before escalation. On pass, the change proceeds to final deployment verification.
One power source. 5 lines out.
sim-matrix · core
core active · 5 lines
- ✓ validating a page before
Validating a page before it goes live
- ✓ measuring core web vitals
Measuring Core Web Vitals and Lighthouse
- ✓ auditing accessibility and
Auditing accessibility and keyboard navigation
- ✓ catching layout breaks a…
Catching layout breaks across breakpoints
- ✓ verifying a specific bug
Verifying a specific bug fix actually worked
Yours to keep.
Drag time forward. Watch what stays.
Forever
That's what owning means.
The rented stack
ai writing tool: subscription
expired · access lostanalytics suite: subscription
expired · access lostdesign platform: subscription
expired · access lost(nothing left)
Your forge
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Ship with confidence: breaks caught before users see them
license: perpetual -
Real measurement, not 'looks fine on my screen'
license: perpetual -
Accessibility and performance verified, not assumed
license: perpetual -
A clear PASS/FAIL instead of vague opinions
license: perpetual
subscriptions expire · deeds don't
Everything in the box.
Pick a piece up. Watch it work.
Pre-production gate with simulated personas: returns PASS or FAIL, never 'looks fine'
6 parts · one working system · ships instantly by email
This wasn't forged for everyone.
- Not for you if you'd rather rent a tool than own one.
- Not for you if you want someone else to run your stack.
- Not for you if you're happy guessing.
Teams that want a hard quality gate before anything reaches production.
then this was forged for you.Works with
Universal by design: these run in any AI. Delivered in the open Agent Skills + MCP format (native in Claude); ChatGPT, Gemini, Cursor and Copilot adapt the same files their own way.
- Claude Native format
- ChatGPT Adapts via open standards
- Gemini Adapts via open standards
- Cursor Adapts via open standards
- Copilot Adapts via open standards
Catch what's on your mind.
the air is clear. nothing between you and the forge.
catch a spark: the forge will answer
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My site is already live, is sim-matrix only useful before launch?
It's designed as a pre-production gate, but it runs against any URL. Most teams use it before a deploy and after a bug fix, because it tests the specific symptom, the fixed dropdown gets opened, the overflowing layout gets measured. The verdict is still a hard PASS or FAIL.
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We already gate deploys on Lighthouse scores, what does persona testing catch that the numbers miss?
Lighthouse gives you scores; sim-matrix tests behavior. It renders three breakpoints with real scrolling and screenshot evidence, runs simulated personas through the page, computes contrast on real backgrounds, and enforces a zero-console-error policy plus regression checks on features that worked before. You get a verdict, not a number to interpret.
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Will sim-matrix fix the problems it finds?
No. It verifies and never writes code. A FAIL comes back with the specific break: which breakpoint, which element, what the screenshot shows, and the fix goes back to whoever built the page.
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How is it delivered?
By email right after purchase: ready to run, downloaded instantly, no setup wait.
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One-time or subscription?
A one-time purchase; no subscription or hidden fees. VAT (20%) is included.
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Can I get a refund?
As a digital product, it can’t be refunded once downloaded. That’s why we show exactly what’s inside and who it’s for, right here.