Hi, I'm Stefan

An AI powered gift finder that works like a collaborator, not a chatbot. You describe the person, it suggests real products, and every like or change of direction shapes the next recommendation.

Turns social profiles into a swarm of browser agents that use a target webapp the way those people would. Teams get the analytics of a live launch for a fraction of the cost spent on generating real traffic.

Otis is a dictation daemon built for macOS. The defining feature that sets it apart from other ASR apps is the command mode, which lets you speak any programming or shell native language directly into your terminal. Say "pipe" and you get |.

A tool for agents and engineers to weave webapp assets into a self-contained html file. Specifically designed with WASM in mind, binaries get brotli-compressed, base64-encoded and stored in pre tags. Modern AI agents have a difficult time editing massive single files, a modularized approach is superior. Histos unlocks the best of both worlds. This tool is used to build my Mecha game, Paleomap3D and the hockey visualization.

A composable agentic shell that dissolves an agent harness into your terminal. Invoke an LLM as a first-class shell program via a single-character alias (? do thing) that pipes, chains, and redirects like any Unix tool. Giverny was built around the core insight that the shell is the agent harness, so it skips bespoke JSON tool schemas in favor of the native commands a model is pre-trained on.

For a while now you would hear that someone got DOOM running on things that should not run DOOM. This version is a playable UTF-8 string: Chocolate Doom compiled to WebAssembly, WADs and all, packed by Histos into one HTML file. Email a friend, no server, no install, no network.

A work in progress, meant to be a endless arena mode to test and iterate upon game mechanics before applying assets such as game art and sounds. Packs down to a single 300kb file using Histos. Built using C and Raylib using a "big struct" style of code.

An interactive 3D globe visualizing continental drift and paleogeographic data across 500+ million years. Built with Three.js on the client-side and a custom data pipeline written in C, Rust, and Python that processes large NetCDF datasets into a compressed binary format or texture for efficient delivery.

A client-server solution to fix and enhance missing functionality of the pokepast.es website. The browser extension replaces missing images using dynamic inline resource insertion, while the art is served by a custom Bun and Elysia.js backend. The extension serves over 1500 daily active users, with the API handling 80k+ monthly requests.

A high-accuracy Discord bot for extracting Overwatch 2 replay codes from screenshots. It uses OpenCV for template matching and a dual-pipeline approach with Tesseract-OCR and the Granite Vision VLM for character recognition. Deployed on over 150 servers and used by professional teams like GenG.

A community hub for the game Deadlock, featuring a suite of custom-built tools, including an interactive tactical map for strategy planning. Built with a high-performance Go backend using templ for server-side rendering and a vanilla JavaScript frontend leveraging the Browser Canvas API for real-time drawing and interaction. The entire application is containerized with Docker for seamless deployment.

A 3D visualization tool that reconstructs NHL games by plotting play-by-play event data in a virtual rink. The project features a Rust-based parser that fetches and processes official NHL API data into a structured format. This data is then rendered on the client-side using JavaScript and Three.js, creating an interactive 3D representation of the game flow directly in the browser with HTML/CSS.