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
Making sense of the debate over AI psychosis
On the latest episode of Equity, we debate whether tech CEOs are "uniquely prone to AI psychosis."
TCAI · 29m ago · 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· 29m ago↑ RISING
Making sense of the debate over AI psychosis
56
aitechVERGE· 9m ago↑ RISING
United flight forced to turn around because of a Bluetooth speaker name
42
techVERGE· 59m ago↑ RISING
This extravagant gaming laptop could ruin other screens for you
42
techLOB· 3h ago↑ RISING
You Must Fix Your Asserts
62
devsystemsLOB· 6h ago↑ RISING
The S in interoperability
62
devsystemsHN· 1h ago↑ SIGNAL
Cloudflare Turnstile requiring fingerprintable WebGL
13
⬆ 72systems✦ /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






