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
Disney Plus is reportedly looking into a free streaming tier
Disney Plus is considering making some of its content free to watch, according to a report from Business Insider. A source tells the outlet that Adam Smith, Disney's chief product and technology officer, mentioned a free streaming tier during the com
VERGE · 21m ago · score 42
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 →VERGE· 21m ago↑ RISING
Disney Plus is reportedly looking into a free streaming tier
42
techWIRED· 14m ago↑ RISING
What Watching a Soccer Final Does to Your Body, According to Science
40
techresearchVERGE· 44m ago↑ RISING
Anker’s 3-in-1 Qi2.2 charging station is $95 off
42
techsystemsWIRED· 33m ago↑ RISING
Hiboy P6 Fat Tire Electric Bike Review: Smooth Sailing
40
techaiCF· 2h ago↑ RISING
Improving Smart Tiered Cache for Public Cloud Regions
60
systemswebLOB· 3h ago↑ RISING
Two Ways To Design
62
devsystems✦ /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






