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
Yope raises $12.3M to build a private social network without algorithms or ads
Yope, a fast-growing social app focused on private groups of friends and family, has raised $12.3 million in seed funding. Instead of chasing creators and algorithmic feeds, the startup is betting that the future of social networking lies in small, p
TCAI · 26m 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· 26m ago↑ RISING
Yope raises $12.3M to build a private social network without algorithms or ads
56
aitechTC AI· 46m ago↑ RISING
Monday.com lays off hundreds to focus on AI
56
aitechWIRED· 46m ago↑ RISING
Dyson V10 Konical Review (2026): Affordable and Solid
40
techHN· 3h ago↑ RISING
Show HN: Bento - An entire PowerPoint in one HTML file (edit+view+data+collab)
39
⬆ 80webVERGE· 2h ago↑ RISING
Apple is reportedly testing a MacBook Neo with more RAM
42
techaiVERGE· 2h ago↑ RISING
Here’s what Samsung’s smart glasses actually look like
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






