Hi, I'm building yydev.
I'm a solo developer. I make small, sharp tools, learn things out in the open, and write about how AI is actually changing the way we build software — the useful parts, not the hype. This is where all of that lives.
Learn AI
Plain-language courses on using AI without the mysticism — for people who'd rather understand it than fear it.
Dev Tools
Tiny web tools I built to scratch my own itch. Free, no login, no upsell — they do one thing and get out of your way.
Blog
Half working notes, half essays. Where I think out loud about the craft and change my mind in public.
Recent writing
See all →AI · Learning
How I'd learn AI from scratch in 2026
The order I'd actually go in if I were starting over: what matters early, what to skip, and why building beats watching.
AI · Prompting
Getting better answers out of AI
Nine things I do that reliably make ChatGPT, Claude, and other models more useful — with before-and-after examples.
Tools
15 free tools I keep one click away
The formatters, converters, and testers I reach for most as a developer, grouped by the job they do.
AI · Concepts
How language models actually work
Tokens, training, and prediction, explained the way I finally understood it. No maths, no hand-waving.
I've kept a personal site for years. It's the one corner of the internet that's entirely mine — no feed, no algorithm, no metric I'm supposed to grow. yydev is a workshop with the door left open. Poke around, take what's useful, and email me when I'm wrong.