Bun.js

Aug 2021 - May 2025 · 1 project

Jan 2024 - Present · 2 projects

Aug 2026 - Present · 1 project

Why my LLM verification gate passed an empty {} reply — failing open in JSON mode

My vision-model gate read each answer as parsed.x === true, so an empty {} reply counted as a pass. How it failed open, and why the feature died anyway.

Aug 2026 · 8 min

Why BullMQ throws 'Custom Id cannot contain :' — and 1,034 green tests missed it

BullMQ refuses a custom job id with a colon. Four of my five id builders used one, and 1,034 green tests spied on queue.add and never noticed.

Aug 2026 · 8 min

A 116-line build gate that fails on broken internal links

A post-build script that walks the prerendered HTML and fails the build on any internal href the build did not emit — and why it reads output, not data.

Aug 2026 · 5 min

Why does an LLM API call return an empty string? Reasoning tokens count against max_tokens

Every AI caption call 500'd in production: a reasoning model spent max_tokens thinking, finish_reason was 'length', and my client returned ''.

Aug 2026 · 8 min

How to render Thai SVG text byte-identically on macOS and in Alpine Docker

SVG text through sharp asks fontconfig for fonts: hundreds on a Mac, none in Alpine. resvg with bundled static fonts gave byte-identical Thai on both.

Aug 2026 · 8 min

Why an image model must never render the text on your product cards

A bulk AI restyle of our price cards dropped rows, invented a code and turned LINE into LIME, and every card looked finished. What replaced it.

Aug 2026 · 8 min

Why our social publisher reported success for posts that never went out

Before it ever touched a platform, our social publisher could go green for posts sent private, wrong or not at all. What we fixed, and what it cost.

Aug 2026 · 8 min

How I became CTO at 23 of the company that hired me as a part-time student

Hired part-time in August 2021, CTO of the same company in August 2026 — five years to the month. What actually happened in between, honestly scoped.

Aug 2026 · 3 min

402 MB to 126 MB: what was actually in my Next.js container

My portfolio held 402 MB resident for a static site. Most of it was 26.7 MB of icon JSON the page graph never used but loaded at boot anyway.

Jul 2026 · 4 min

Build with Bun, serve with Node: dodging a standalone RSS leak

I use Bun everywhere in this repo except the one place that matters most: serving. Why the runtime stage of my Dockerfile is plain node:26-slim.

Jul 2026 · 4 min

next-intl Thai/English localization with a shared UI workspace

Three days into a Bun monorepo I shipped next-intl Thai/English routing and moved the shadcn set into a shared workspace package. What that actually costs.

May 2026 · 5 min