Marc KelechavaPROJECTS · 2 IN PROGRESS

Projects

Stuff I build on my own time. The ones I’ve put the most into are at the top.

2026 · in progress

Cosine Club Digger

Cosine Club Digger in a browser: a player across the top, a trail of four steps on the left, step 4 listing tracks that sound like the label Ilian Tape in the middle, and a small map of the step on the right.
A dig that started from two Skee Mask tracks. Step 4 follows the label of a pick in step 1, Ilian Tape.

A music-discovery app I’ve been building since January. I start a dig from a track or two I love, and each step lists the tracks that sound closest, found by cosine.club audio similarity. From any pick I can follow the track, its label, its artist or a person on its credits into the next step. Discogs supplies the labels and credits.

Every pick says why it’s there, and no language model runs anywhere in it. The tracks I keep and pass feed two private YouTube Music playlists, which Digger reads back and checks track by track after every refresh. It runs on my laptop, and an iPhone and iPad app pairs with it.

How it works

2026 · open source

Lane

Lane lets my main coding agent hand tasks to Codex and Claude Code workers and keep working while they run in the background, several at once. Each job runs on a preset for the model, the effort and a time limit, and each worker that writes code gets its own checkout on its own branch. Every job comes back as one line of JSON with the outcome and a written report.

A worker’s result counts only when my own acceptance command passes in its checkout and the files it was told not to touch are unchanged. Lane won’t start a new task once I’ve used 90% of my weekly Codex limit, and it can send workers to a local model on my own server. It’s one Python file with no third-party packages.

How it works · Source on GitHub

2026 · in progress

Sunset Bound

A still from Sunset Bound: a small grey and white rabbit on a lakeside path under hanging willow branches, in flat pastel colours.
Pine Lake, from the first chapter.

A 2.5D adventure about Winnie and Trisha, two pets crossing San Francisco. I’m building it in Unity. The characters and sets are modeled in Blender and rendered into 2D art.

The first playable demo is Chapter 5, Winnie’s trip to a neighborhood market. She forages the produce aisle by reading the price cards. Good greens fill her energy meter, the wrong foods count as strikes, and a full meter unlocks a super hop up to a high ledge. The demo builds for Mac, Windows and Linux.

2026

brickforge

A description and a few photos in, a LEGO model out that I can order and build. I describe what I want, an AI model designs it with me, and brickforge turns the design into step-by-step building instructions and a parts list.

Before anything is ordered, two checkers written separately have to agree that every step can be built. Each new piece has to land on real studs, go in from one direction and have a clear path to get there. So far it has produced a 422-piece bunny and a 122-piece Trisha, one of the two pets from the game.

2026 · open source

heavylane

A command-line tool that runs heavy jobs from my coding agents on a spare Mac over SSH. The agents, the editor and the repos stay on the laptop, and the logs, memory measurements and results come back when the job finishes.

Each job ships a snapshot of the repo with uncommitted edits included, rebuilds its environment on the other Mac and runs in a detached tmux session. heavylane samples the job’s memory every two seconds and kills it if it crosses the limit I set. One lock on the host means one job at a time. A second job waits its turn or comes back with exit code 75, so the agent knows to try later. It’s open source.

Source on GitHub

2026 · open source

Project Spaces for Obsidian

An Obsidian plugin that gives each of my projects its own set of live tabs. Switching projects hides one set and shows another, so nothing closes or reloads. Cursor, scroll position and undo history all survive the switch, and there’s no workspace to save.

Source on GitHub

2015 to now

Muon and Excise Records

I’ve produced and performed electronic music as Muon since 2015 and co-founded Excise Records, a vinyl label in San Francisco.

Music