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
Margaret Atwood says the problem with AI is ‘garbage in, garbage out’
Margaret Atwood onstage at Detroit Opera House on January 26, 2026 | Photo: Monica Morgan/Getty Images Maraget Atwood, the storied author of The Handmaid's Tale and The Blind Assassin, was interviewed as part of the Babell Literary and Cultural Fes
VERGE · 43m 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· 43m ago↑ RISING
Margaret Atwood says the problem with AI is ‘garbage in, garbage out’
42
techaiLOB· 3h ago↑ RISING
Guards! Guards
62
devsystemsTC AI· 2h ago↑ RISING
Apple Vision Pro exec is reportedly leaving for OpenAI
56
aitechLOB· 4h ago↑ RISING
A peek into Reddit's anti-spam internals
62
devsystemsWIRED· 1h ago↑ RISING
62 Last Minute Prime Day Weekend Deals: Up to 45% Off (2026)
40
techaiVERGE· 1h ago↑ RISING
Apple wants permission to buy memory from a blacklisted Chinese supplier
42
techai✦ /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






