yuru web & ai engineering
what we build and run

everything here is running right now.

we build websites, software, and evaluation systems for clients. these are the ones we built for ourselves, still operate, and stress-test before a client sees anything.

selected work

yume

product · shipping

a native desktop app for agentic coding, built in rust and tauri. runs agents in parallel on isolated branches, streams the model's thinking live, tracks your usage limits and acts before you hit them. mac, windows, and linux, with a free demo.

tauri + rust parallel agents usage guard multi-provider
see the product →

cutebear

live system

a pre-market analysis system that runs before the opening bell. thirty-one instruments are reduced to ten derived signals in code, so the model reads verified numbers instead of doing arithmetic on raw prices, and every call is graded the next day against what the market actually did. it keeps its own score.

10 derived signals 24 news feeds 31 tickers self-grading
see how it works →

burnt melba

autonomous ai · live

a fully autonomous AI vtuber that live-streams unsupervised. 61 tools, browser automation over the devtools protocol, a persistent memory and goal system, and the ability to edit her own code while streaming. the proving ground for everything we claim about agent reliability, and where our data grading pipeline was built.

61 tools CDP browser agent LLM-as-judge corpus self-modifying
read the case study →

toastrooms

game world · live

a minecraft server with a dimension nobody built: 96 generated rooms of an abandoned toast city, belts still running, ovens still warm. the way in is findable from inside the game and written down nowhere. no mods, no whitelist, java and crossplay.

96 generated rooms mc.yuru.be no mods live since sep 2026
toastrooms.net ↗

notepad mint

windows app · free

a free, dark replacement for notepad.exe, written in raw c and 32-bit x86 assembly with no c runtime. the whole editor is one 166 kb exe that runs on 32-bit windows, 64-bit windows and windows on arm. dark and light themes, every encoding and line ending, a 128-step undo and redo, and no ai, no sign-in, no telemetry.

raw c + x86 asm 166 kb exe 128-step undo no telemetry
see the app →

also from the lab

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the same people who built these do the client work.