A deep dive into SpacetimeDB's TypeScript SDK and how to wire it into a Next.js 15 App Router application for live visitor tracking and realtime features.
3 min readCurrent systems
Active work,
live signals, and writing.
Featured builds, the latest ranked signal, and recent writing — all in one place.
Featured build
MAINFRAME
Open-source bash stdlib for AI agents. Signals systems-level engineering range. Shows open-source authorship.
Pure bash runtime · Agent working memory primitives
Latest ranked signal
KitchenAid Artisan Plus Stand Mixer Review: Tiny Additions, Big Difference
The kitchen appliance titan changed up its beloved base-model stand mixer for the first time in over 70 years. It was worth the wait.
WIRED · 44m ago · score 40
Publishing system
Building Realtime Apps with SpacetimeDB and Next.js 15
A deep dive into SpacetimeDB's TypeScript SDK and how to wire it into a Next.js 15 App Router application for live visitor tracking and realtime features.
3 min read · spacetimedb · next.js
Open-source ecosystems
Projects I support
Small but important signal: I contribute to and support AI-native developer tooling beyond my own products.
✦ Selected Work
Systems I've Built
Ranked signal feed
Full feed →WIRED· 44m ago↑ RISING
KitchenAid Artisan Plus Stand Mixer Review: Tiny Additions, Big Difference
40
techaiWIRED· 1h ago↑ RISING
Coway Airmega Mighty2 Review: The Sequel Is Better Than the Original
40
techaiLOB· 8h ago↑ RISING
NetHack 5.0.0
62
devsystemsHN· 14h ago↑ HOT
VS Code inserting 'Co-Authored-by Copilot' into commits regardless of usage
100
⬆ 613devLOB· 9h ago↑ RISING
A GitHub for maintainers
62
devsystemsHN· 6h ago↑ SIGNAL
Kimi K2.6 just beat Claude, GPT-5.5, and Gemini in a coding challenge
28
⬆ 142ai✦ /now
What I'm Doing
Right Now
Building
ACTIVE
PropertyJunk.com — junk removal SaaS platform
ACTIVE
TaxScout.app — commercial real estate tax optimization
WIP
MAINFRAME — open source bash stdlib expansion
WIP
toddwatts.dev — this site
Reading
01Attention Is All You Need (re-read)
02The Pragmatic Programmer — 2nd ed.
03Designing ML Systems — Chip Huyen
Watching
▶
Andrej Karpathy
Neural nets: Zero to Hero
▶
Lex Fridman
Sam Altman ep.
▶
ThePrimeagen
Rust streams
My Setup
EditorVS Code + Claude Code
AIClaude Sonnet 4.5, Pi
RuntimeBun 1.2
DeployVercel





