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
As AI companies race to go public, who else is along for the ride?
Startups are trying to "ride that SpaceX IPO wave."
TCAI · just now · score 56
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 →TC AI· just now↑ RISING
As AI companies race to go public, who else is along for the ride?
56
aitechVERGE· 8m ago↑ RISING
Conclave is the sound of a NYC summer block party
42
techVERGE· 38m ago↑ RISING
How to watch most of the World Cup matches with free trials
42
techsystemsLOB· 4h ago↑ RISING
Point Cloud Sound for irregular shaped audio sources
62
devsystemsLOB· 5h ago↑ RISING
Arch Linux AUR Hit By Another Wave Of Now More Sophisticated Malware Attack
62
devsystemsHN· 1h ago↑ SIGNAL
No, everyone is not using AI for everything
16
⬆ 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






