On boring software, in interesting times
Notes on launching to crickets
Prompt library · Taiwan stock analysis
Browser-only · Bilingual · Free tier
LuvAI
An independent studio building tools for people who want to actually do something with AI — not just read about it.
The interesting problem in AI is no longer the model. It's the gap between information that's public but illegible — a prompt that should work, a stock that just moved — and a person actually getting usable work out of it. Closing that gap is the whole job.
In the workshop
The studio currently ships two products. The first is PromptCraft, a working library and generator suite for people who use AI to make things — images, video, music, text. The second is 股譯 GUYI / LUVAI Stock, a Taiwan equity site that translates each stock into one plain-language read on why it moved today — with a full research terminal underneath. Sign in once and you have both: the two products share a single account and one credit wallet, by design.
The thing I actually wanted — a working library where every entry had been run through the model it claimed to support — wasn't there. So I built it. Same story for stock research: I wanted one screen that didn't make me click through fifteen tabs.
Other tools are at varying stages of “built it for myself, deciding whether to ship.” They surface here when they're ready, not before. The studio runs on shipping things that are actually done, not pre-announcing things that aren't. See the full roster →
PromptCraft.
A working library for people who use AI to make things. Curated, tested, opinionated.
- 180+Entries in the library
- 7Free in-browser tools
- 20+AI models supported
- 2025Live since
股譯 GUYI.
LUVAI Stock — a Taiwan-equity site that answers one question in plain language: why did this stock move today? Chips, technicals and valuation, each turned into a sentence you can act on.
- 2,000+Listed stocks tracked
- 27Investment masters
- 4Decision-score factors
- 2026Live since
Journal
- 01May 312026 · Studio philosophy
The second product
On building a Taiwan stock-analysis tool from a prompt-library studio — and the one sentence that turns out to connect them.
5 minP. 05 - 02May 202026 · Product design
On encoding a point of view
Software is a set of opinions frozen into a usable form. The strength of the opinion is the best predictor I know of whether a tool survives.
5 minP. 08 - 03May 132026 · AI tools
A tiny tool for an annoying chore
On shipping a free LRC subtitle generator because the API got cheap enough that the problem became embarrassing to leave unsolved. Plus a Chinese-language version below.
5 minP. 11 - 04May 092026 · Studio operations
Notes on data you don't own
The stock tool runs entirely on data I don't control. Notes on the quiet, defensive craft of building on borrowed facts.
5 minP. 14