William Huang — fullstack engineer. Notes on shipping software, and the products I build.https://wayleem.com/https://wayleem.com/blog/flowviant-cli-version-floors/https://wayleem.com/blog/flowviant-cli-version-floors/Two more CLI runtimes in the workbench, each gated on the daemon actually being able to serve it — and refusing in words when it can't.Tue, 18 Aug 2026 00:00:00 GMTflowvianthttps://wayleem.com/blog/deleting-the-ai-i-built/https://wayleem.com/blog/deleting-the-ai-i-built/Flowviant shipped its own server-side project AI for months. I removed all of it — the pipeline, the skills, the gateway — and made the product run on the user's own Claude instead.Mon, 17 Aug 2026 00:00:00 GMTEssayhttps://wayleem.com/blog/your-grader-is-an-injection-target/https://wayleem.com/blog/your-grader-is-an-injection-target/If a model grades free-text answers against a rubric it also holds, the student can write instructions instead of an answer. Fencing the input and clamping the output are both necessary.Sat, 15 Aug 2026 00:00:00 GMTNotehttps://wayleem.com/blog/skadooble-hardening-pass/https://wayleem.com/blog/skadooble-hardening-pass/A full audit of the failure paths: a crash could empty a question bank, out-of-order Stripe events could resurrect a cancelled plan, and AI spend had no ceiling.Fri, 07 Aug 2026 00:00:00 GMTskadooblehttps://wayleem.com/blog/skadooble-mastery-dashboard/https://wayleem.com/blog/skadooble-mastery-dashboard/Per-unit, course, and cross-course mastery in one view; applied and recall tagging put to work; and a follow-up conversation attached to any question you got wrong.Mon, 03 Aug 2026 00:00:00 GMTskadooble