👋 Hello, I'm U-Zyn Chua

I'm a software engineer. I build, research and write about technology, artificial intelligence, and the open web. I also mentor startups and teach AI engineering.

Learn more about me or explore my thoughts through my articles.

Recent Posts

Who is OpenClaw for? 🦞

openclaw ai

🦞 OpenClaw is all over my feeds. Viral testimonials, threads about productivity gains, people swearing it changed their workflow. I installed it, ran it for a bit, and came away underwhelmed. Not because the tech is bad, but because I cannot figure out who it is actually for.

What is OpenClaw actually

Strip away the demo videos and you get a fairly straightforward architecture. OpenClaw runs a long-lived daemon that listens on messaging channels: WhatsApp, Telegram, Slack, Signal, take your pick. When you send it a message, it passes your text to an LLM, loads your memory files into context, and invokes whatever tools it needs. There's also a heartbeat: a configurable cron job (default 30 minutes) that triggers the agent even without a message, so it can check in, surface reminders, or run scheduled tasks.

The heartbeat is the interesting part. The design addresses one of the more popular wishlist items, instead of prompting to get an output, AI would be able to perform tasks without you first prompting it. Memory on the other hand: it's markdown files on disk, loaded into context each invocation. ChatGPT's memory works the same way under the hood. Skills are shell scripts paired with prompt files, essentially wrapped CLI commands with some LLM scaffolding.

The architecture is clean and straightforward.

Read more...

Raspberry Pi prices have gone through the roof

linkblog raspberry-pi hardware memory prices singapore

Web browser discrimination

linkblog web browser open-web

Bambu RFID scanner on Flipper Zero

3d-printing bambu flipper-zero rfid nfc hardware opensource

Passkey Security CTF Challenge for TISC

passkey ctf security tisc webauthn zig

Inconsistent keyboard UX on macOS

macos ux keyboard-shortcuts accessibility windows ui-design

DEF CON 33

defcon security

Passkey has a theft detection feature, but Apple, Google and Microsoft broke it

passkey security signcount microsoft apple google

Passcay: Zig library for passkey auth

passkey passcay zig ziglang opensource security

OpenAI Codex

openai ai coding

Guest Lecture at NUS Business School: The Open Web

Fun project 16 years ago

A series of rabbit holes

zig vscode

The Roadmap Pitfall: Companies Should Not Sell Tomorrow's Features Today

roadmap startup product apple ai apple-intelligence

Introducing Tixie

tixie singapore rust aws lambda vibe-coding engineering

Digg is coming back

digg open web

Hidden messages from OpenAI GPT 4.5 announcement

ai anthropic claude

Claude Code is impressive

ai anthropic claude

Thoughts on Perplexity Deep Research, after 24 hours of heavy use

ai deep research perplexity

OpenAI on Open AI Strategy

ai openai opensource