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. Source / cbbcf92 kitdb/sqlite: Open of a file that has rows and needs an anchor (the history of every table and none yet, or a Barrier after the newest) writes it in the background from a snapshot of now, so the first write no longer waits for a .base of every page: on shopping's copy the first CREATE TABLE through the old engine's port took 35 ms while the 27.6 GB anchor was written, where it was canceled at 84 s A file made now still gets its anchor before Open returns (its few pages). Otherwise Open calls anchorLater, the anchor of a table's start of 08/11: a read transaction opened as Open returns fixes the revision, a goroutine writes the pages after any anchor or Retain running, Close stops it and the next Open starts it again. Until it is written a restore that needs it finds none (ErrNoAnchor; engine2 says so in Vietnamese); TestMaintainMarksASchemaChangeAndRestoresAcrossIt now waits for it before it restores. anchorStarting, nil but in tests, holds a background anchor as it starts. On a copy of the real shopping (27.6 GB, its anchors set aside) through the old engine's kitwork database: CREATE TABLE 35 ms, then INSERTs 1–13 ms while anchor-….tmp grew, the .base of revision 15 (the one at Open) done some 85 s later, an INSERT after it 5 ms. Control: with Open writing the anchor before it returns, "no anchor started in the background". Quốc: "vâng làm đi", 09/11/2026. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> 2026-11-09

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.