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 / 70c7c09 jit/js: tabs — the keyboard half of a tablist A worked example of where the line falls. Switching panels is the grammar: a value, a click that assigns it, a show that reads it — the `tab` component that did only that was deleted yesterday. Keeping one tab in the tab order is the grammar too, so it is a tabindex binding in the markup. What is left is the part a keyboard user feels — arrows that wrap along the tablist, Home and End, and focus moving with the selection — and moving focus is the whole job. Three things my own first version got wrong, each fixed here: - it wrote tabindex from JavaScript after every paint, which failed because afterRender is one-shot. The failure pointed at something better: a rule a reader can see belongs in markup. The component halved in size. - every helper was public. init(context) has no private storage, so whatever a component remembers lands on the scope, where markup can call it and $alias.step(1) is legal forever. The old runtime already solved this with a module-level Symbol (carousel/2.0.0.js), which markup cannot name and Object.keys does not show — and it is also how a method reaches its context after init. That is now rule 7 of the standard. - a real bug: the arrows moved focus onto a tab with no data-tab and stuck there, because selection could not follow. Unnamed tabs are skipped now, and counted in a named warning at mount. aria-orientation="vertical" is supported and, unlike before, tested: code with no red case is code that does not exist. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> 2026-09-23

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.

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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.