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
Pool’s new app turns your screenshots into something useful
Pool's new app automatically sorts screenshots into personalized collections, tracks down the original links behind saved content, and helps you rediscover products, recipes, travel ideas, and other things you meant to revisit.
TCAI · 46m 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· 46m ago↑ RISING
Pool’s new app turns your screenshots into something useful
56
aitechVERGE· 12m ago↑ RISING
A warrantless wiretap law is about to expire — but surveillance networks aren’t actually ‘going dark’
42
techaiVERGE· 16m ago↑ RISING
Waymo introduces $30-a-month premium tier for riders who want faster pickups
42
techaiWIRED· 9m ago↑ RISING
Drug Sites Hijacked Spotify’s Search Ranking Through Fake Podcasts, Report Finds
40
techaiLOB· 2h ago↑ RISING
CVE-2026-45257: LPE in FreeBSD via kTLS-RX
62
devsystemsTC AI· 1h ago↑ RISING
DoorDash’s new AI chatbot lets you order with prompts and photos
56
aitech✦ /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






