Self-taught developer / Systems notes

A quiet place for
life, systems,
and long learning.

I am Huynh Nhan Quoc, a self-taught developer from Tam Ky, Vietnam. I have been learning through real products, broken deployments, private systems, and years of starting again. This site keeps that road in one place: the ideas, the work, and the life around them.

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2015 Started learning

Tam Ky Home

Go + JS Working tools

In public Current chapter

Ways into this site

Enter through the question you have.

01 / What is it? Concepts Runtime, bytecode, VM, JIT, compiler, tenant, and the words behind the code. 02 / Why did I learn it? Articles Long essays, field notes, failures, and lessons gathered over time. 03 / How did I build it? Projects Working experiments where ideas have to survive contact with real use. 04 / Who is behind it? About A shorter introduction, the journey, beliefs, and ways to reach me.

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One body of work, several ways in.

Look up one concept, follow a topic across formats, or begin with a collection selected in reading order.

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concepts: 31
articles: 64
topics: 20
collections: 4

Featured collection Runtime foundationsA path through source code, bytecode, virtual machines, and the boundaries of execution. 9 entries

Now

What is moving today.

Live from the archive and source

Building Kitwork Runtime workbench for multi-tenant websites Learning / 2026-07-09 Zero VM A beginner-friendly guide to understanding requests that bypass VM execution. Writing / 2026-08-23 I Never Planned to Build a Database. I Just Wanted Kitwork to Manage Thousands of Websites More Simply. Source / 59ae3e5 fix(jitcss): emit arbitrary background images, not just arbitrary colours `bg-[…]` is resolved by Tailwind by inspecting the value: url() and the gradient functions are images, a colour is a colour. Only the colour half was ever implemented, so `bg-[linear-gradient(…)]` produced no rule at all — silently. The class stayed in the markup, nothing errored, and the element simply had no background. On kitwork.io that is why the hero illustration's dark ground was missing: every chip, dot and label inside the window mock resolved correctly while the surface behind them stayed white. The new rule is listed AFTER the hex rule so colours are still claimed there, and the handler answers only shapes it can type with certainty — url(), the six gradient functions, and the explicit image/length/size/position hints. A bare `bg-[10px]` or `bg-[center]` is genuinely ambiguous, so it stays unclaimed rather than being guessed into the wrong property; that is what it already got, so nothing changes meaning. unescapeArbitrary applies Tailwind's underscore-is-a-space rule, honouring a backslash-escaped underscore — a url() path can contain one. Tests cover a single gradient, underscore-to-space, the real multi-layer class from kitwork.io, and url(). Two controls guard the edges: hex must stay a background-COLOR, and the ambiguous shapes must add no image rule. The ambiguous control measures against a document carrying one harmless class, because the preflight reset itself contains `background-image: none` and an empty document generates no CSS at all — comparing against that made the check pass for the wrong reason twice before it was right. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> 2026-09-08

Fresh from the long road.

The path from text to behavior.

01 Source

02 Lexer

03 AST

04 Compiler

05 Bytecode

06 VM

Runtime

The place where code receives memory, values, limits, and a world in which to run.

Bytecode

The compact instruction layer between source language and machine behavior.

Virtual machine

A machine made of software that reads those instructions and enforces their boundaries.

explore all concepts

The road so far

Not a straight line.

2015

Blogger and HTML. The first small changes that made the hidden structure of a website visible.

2018

A friend's coffee shop and a Firebase night. Dependency stopped being an abstract technical word.

2020

Home, delivery work, and Kitstack. Real projects began shaping a private Go platform.

Now

Opening the useful parts. Kitwork, concepts, articles, and source code turn private lessons into public material.

Short journey Full story

This site is also an experiment

The URL follows the directory tree.

Each folder can inherit layout, metadata, and runtime behavior from the folders above it. The page you are reading is both a personal homepage and a working Kitwork tenant.