I am Jun Wu, founder and sole operator of YAOLUMEN TECHNOLOGIES LTD. This is the engineering log — notes, side projects, and the parts of building a company that do not fit on a corporate site.
Cheese SEO runs the five on-page checks I was paying agencies $2k/month to do. One file, one price, one page — no subscription, no dashboard, no login.
Five concrete checks for one page. A checklist, not a 60-page report.
A free audit tool, a waitlist-only SaaS, and the live store that proves the SEO strategy works.
A WP AI that writes 90 days of content while you sleep. BYOK, 7-day auto-destruct.
Free · no signup30-second AI SEO audit. Paste a URL, get a markdown report. No login.
Case study2 months to Google #7 on a real long-tail. The strategy, the stack, what I'd change.
A new note every week or two. Some ship, most do not — that is the point.
A 干支 calculator that takes a Gregorian year and walks back to the Chinese sexagenary cycle — the first step toward the chrono-sim demo I keep promising myself.
Latest from the engineering log.
Monorepo, override pattern, and the very small number of decisions that make a family of sites feel like one company without forking the design system.
Why I dropped glass from the base surface of this site and kept it only for the things that float.
Notes on a $29.9 tool I built because I got tired of paying agencies $2k/month to do the same five things to a page.
The exact keyword, the exact page, and the four things I did to a WooCommerce store that a $2k/month agency would have charged me three months of retainers to do.
The five modules, the data-anonymization rules, and the reason the tutorial lives in Notion and ships through Stripe instead of being a PDF.
Three rules I keep breaking, and the one rule I am trying to learn. Mostly the same as the way I read anything else.
A short, roughly weekly note on what I am building, reading, or breaking.
Finished moving the override pattern out of me/ and into the shared package docs. The corporate, lab, and me sites now share tokens, atoms, and i18n helpers. Each keeps its own voice. The total LOC for shared design system is under 600 lines, which is the right size.
Three repos would have been simpler to start. Three repos also would have been three places where tokens.css diverges. The monorepo is more setup now, less drift later. That trade is worth it for a one-person team with three sites.
Tried Next 15 for two weeks. The DX is good, the deploy story is good, and the bundle is bigger than it needs to be for a static site. Astro gives me the same templating with zero runtime. Going back.
Design, code, and a long chrono project — small enough to actually finish.
“The most useful blog I read this year. The chrono posts alone are worth subscribing for.”
Open to one or two collaborations a year. Short emails, fast replies.