I'm Dennis. Retrieval-grounded tutors, multi-agent teams, desktop tools that learn how you work. Usually solo, idea to production. Off the keyboard I repair and mod electronics, mostly game consoles. Heading toward neuroscience and robotics next.
Impossible is a word to be found only in the dictionary of fools.
A motor-imagery BCI wired into a working speller
A real-time EEG decoder for imagined left/right hand movement (CSP + LDA), fused into a universal switch-access speller that also accepts a hand gesture, a blink, or a keyboard switch. It closes the whole loop - raw EEG to trained classifier to live decision engine to text on screen - as the control layer behind assistive communication for people who cannot move or speak.
Turns one long video into short vertical clips
Give it a YouTube link or a file: it transcribes the whole thing, scores the strongest moments, crops each to 9:16, burns in animated captions, and hands back finished clips. Includes a full editor for trimming, caption styling, and reframing. Runs entirely on your own machine - no account, no subscription, no upload.
A digital-marketing agency staffed by AI agents
Eight specialized agents - CEO, CMO, Chief of Staff, Finance Strategist, Analyst, Bookkeeper, Closer, and more - organized in an org chart built on real growth frameworks. Ships as a downloadable Electron desktop app.
An AI tutor grounded in real lecture material
A free, curated hub of college-level courses. Each course pairs real lecture material with an AI tutor that answers from the actual lecture content rather than general knowledge, so answers match what the course teaches.
A pixel-art desktop companion that runs fully offline
A small pixel creature that lives in the corner of your desktop. Click it to talk and it listens, reflects things back, and checks in on how your day went. No account, no cloud provider, no telemetry - it works with the network unplugged, and every sprite is hand-authored pixel data. An optional local model server is off by default.
Real nested folders for ChatGPT and Claude
A Chrome extension that adds unlimited-depth folders directly inside the ChatGPT and Claude sidebars you already use - not a separate dashboard. Drag and drop, per-folder colours, and a separate folder tree per chat list so a conversation can never land in the wrong one. Exports the whole structure as JSON.
YouTube transcripts that survive rate limiting
Most transcript tools die the moment YouTube returns a 429. This one probes several independent fetch methods against YouTube in your real browser session, measures which is actually working right now, and uses that. Handles a single video, a pasted batch, or an entire channel. Manifest V3, zero dependencies.
A privacy-first automatic time tracker for Windows
It quietly notices which app or site you are using and turns your day into a timeline, a focus score and simple reports. Think Rize without the cloud, the AI or the subscription: no account, no screenshots, nothing leaves your computer.
An agentic engineering setup in two commands
Kun Chen’s agentic engineering environment ported to Windows 11 + WSL: clone the repo, run two commands, get a fully configured agent-ready development machine.
1v1 Sudoku - first correct grid wins
A dead-simple 1v1 Sudoku race for friends: share a link, race the same board, first finished grid takes it. No accounts, no setup.