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
Trump’s mass firing just dealt another blow to American science
This past week delivered another gut punch for science in the US. This time, the target was the National Science Foundation—a federal agency that funds major research projects to the tune of around $9 billion. The foundation’s efforts were overseen b
MITTR · 1h ago · score 57
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 →MIT TR· 1h ago↑ RISING
Trump’s mass firing just dealt another blow to American science
57
researchaiMIT TR· 1h ago↑ RISING
A new US phone network for Christians aims to block porn and gender-related content
57
researchaiWIRED· 10m ago↑ RISING
Soundcore Nebula P1 Projector Review (2026): Compact and Portable for Indoor-Outdoor Viewing
40
techWIRED· 43m ago↑ RISING
This Treatment Could Reverse Osteoarthritis Joint Damage With a Single Injection
40
techaiLOB· 3h ago↑ RISING
What are you doing this weekend?
62
devsystemsLATENT· 5h ago↑ HOT
[AINews] Agents for Everything Else: Codex for Knowledge Work, Claude for Creative Work
67
airesearch✦ /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





