hello!

Hi! I'm @yumi_acess

Tester & Developer

I break things on purpose, so they don't break by accident.

Bugs caught: 0 Move the magnifier, then click the bug

About me

I'm a tester and developer. I poke at apps, websites and AI models until they misbehave, then write clear bug reports and help fix what I find. In between, I build small interactive web demos, like a 3D aquarium with a very judgmental cat.

My testing checklist

Click everything twice Open it on a tiny phone Turn the Wi-Fi off Type emoji into every field 🙃 Write down how to repeat it

What I do

Testing

Manual and exploratory testing, sneaky edge cases, and bug reports with clear steps to reproduce.

Development

HTML, CSS and JavaScript: interactive pages, small tools and 3D scenes with three.js.

AI prompt tests

Big, detailed prompts that stress-test AI models, plus side-by-side comparisons of what they produce.

Projects

Screenshot of the Folio tray notepad — Folio

Folio new

Tray notepad for Windows

A paper-style notepad that lives in the tray.

C# · .NET 8
WinForms + WebView2
AI helper

Download .exe Code Screenshots

Keeper's Corner

Interactive 3D aquarium

Clownfish, an anemone reef, day and night, and Milo the cat, who is not in charge of feeding. Built with three.js in a single HTML file.

three.js
WebGL
prompt test

Live demo Code Prompt

Screenshot of the ToPath Saver popup in light and dark themes — ToPath Saver

ToPath Saver new

Chrome extension for downloads

Pick where the next download goes in two clicks: Documents, Images, Video, Archives or your own folder. Auto-sort by file type, keyboard shortcuts, light and dark themes, and zero tracking.

Chrome MV3
React + TypeScript
no tracking

Download .zip Code Screenshots

Next test in progress…

Something new is on the testing table right now.

Say hi

Found a bug, have something that needs testing, or just want to chat? I go by:

@yumi_acess

GitHub