Independent software studio from Lviv, Ukraine

Small, sharp tools for your Mac, your browser, and your AI

I build practical products for people who work across many tools every day: native macOS utilities, browser workflow helpers, and MCP servers for real operations.

macOS apps · Chrome extension · Model Context Protocol servers · open source where it matters

Browser Extension

AI beside the page you are already reading

SideBarny Chrome side panel UI with provider selector and capture controls S

SideBarny · Sidebar.next

An AI side panel for your browser.

Add to Chrome ->
8

Provider-aware side panel

SideBarny is built for real research and support work: capture selected elements, send text or HTML to the LLM you choose, and keep page context close.

ChatGPT Claude Gemini Rovo
MCP Servers

Operational APIs your AI can use without pretending to be autonomous

MCP is useful when it exposes narrow, reviewable actions. Reads should be cheap, mutations should be gated, and credentials should stay local.

Latest update

What got less annoying

All updates
July 6, 2026
sitednsgithub pages
EN

rmarinsky.com.ua stopped pretending to be an abandoned hosting stub

The product hub for Diduny, BrowserCat, Papuga, and the rest of the tool shelf now runs on GitHub Pages with valid HTTPS and a real release-update channel.

Read the release note ->
Built by Roman Marinsky

QA engineer, macOS developer, and community builder

I work at the intersection of test automation, Mac productivity, and practical AI integrations. The bar is simple: the tool should remove friction, not create another dashboard to babysit.

More context