Project index

Selected work.

Software, open-source maintenance, and research projects collected in one place.

Recent projects

Featured

Weather

May 2025–Present

SimpleWeather

A redesigned TypeScript weather extension for GNOME Shell with 70,000+ downloads and an active contributor community.

TypeScriptGJSClutterGTK

Engineering Deep Dive

Grad-CAM heatmap overlaid on a mammogram from the CBIS-DDSM collection

XAI & Privacy

Jun 2026–Present

Breast Cancer AI

Research on explainable, privacy-aware AI for breast-cancer imaging.

PythonExplainable AIDifferential PrivacyFederated Learning

CBIS-DDSM mammogram via TCIA; Grad-CAM and processing by Roman Lefler. CC BY 3.0 (opens in a new tab)

Dropbeat media controls open in GNOME Shell with album artwork by Magnific

For Music

Jul 2025–Present

Dropbeat

A TypeScript GNOME Shell extension with a custom media-control card and fullscreen album art experience.

TypeScriptGJSD-BusGTK

Album artwork by Magnific (opens in a new tab).

Earlier projects

Older Software

OpenWeather Refined showing current conditions and a two-day forecast in GNOME Shell

Check the archives

Dec 2023–Jul 2025

OpenWeather Refined

A JavaScript GNOME Shell weather extension with 160,000+ downloads that I maintained until replacing it with SimpleWeather. Read about the history and timeline.

JavaScriptGJSClutterGTK

Riffle multiplayer card game start screen

Web Game

May–Nov 2025

Riffle

A multiplayer web game built with C# ASP.NET Core, TypeScript, and SignalR real-time synchronization.

C#ASP.NET CoreTypeScriptSignalR

Opens repository on GitHub

main.shv

i32 main{    i32 x = 0xA4;    return x + 7;}

Compiler

Oct–Dec 2023

shove

A C99 custom language compiler project with a lexer, abstract syntax tree parser, and LLVM code generation.

CCompilerLLVMCross-Platform

Opens repository on GitHub

clhasher

$ clhasher --fnv1a-64 -adx "systems"u32 [0]:	0x2754CEFDu32 [4]:	0x17DC1C55

CLI Utility

Oct–Nov 2023

clhasher

A C command-line utility for hashing strings, files, and standard input with various algorithms.

CCLIHashingLinux

Opens repository on GitHub

libcfg.c

Cfg *globalCfg = cfgRead(globalF, 0);Cfg *localCfg = cfgRead(localF, 0);Cfg *master = cfgMerge(localF, globalF);

C Library

Dec 2023

libcfg

A C library for reading, writing, and merging common Unix configuration-file formats with configurable syntax options.

CLibraryConfigLinux

Opens repository on GitHub

exampletable.c

hashtable_T *table = htTableCreate(5000);htSetString(table, "key", "value");htTableDestroy(table);

Hash Table

Oct 2023

hashedbrown

A fast and versatile C hash-table library for storing strings, numbers, and arbitrary buffers.

CLibraryHash TablesLinux

Opens repository on GitHub

Deep Learning

Research

CBIS-DDSM mammogram via TCIA; Grad-CAM and processing by Roman Lefler. CC BY 3.0 (opens in a new tab)

Jun 2026–Present

Breast Cancer AI

Research on explainable and privacy-preserving deep learning for breast-cancer imaging, including a survey of 38 studies and experiments.

Read the introduction

Interpretability

XAI

Comparing Grad-CAM, SHAP, and LIME to examine which regions influence model predictions and how explanation methods differ.

PythonGrad-CAMSHAPLIME

Data protection

Privacy

Studying federated learning and differential privacy alongside explainable AI and model performance instead of as a separate addition.

PythonFederated LearningDifferential Privacy