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
These new Roombas are smaller and cheaper
iRobot upgrades its lidar-based robot vacuum line with eight new models. | Image: iRobot iRobot has announced a new line of Roombas, a year after it debuted its first lidar-based robot vacuums just prior to filing for bankruptcy. This week, it intr
VERGE · 52m 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· 52m ago↑ RISING
These new Roombas are smaller and cheaper
42
techaiLOB· 3h ago↑ RISING
CSS & vertical rhythm for text, images, and tables
62
devsystemsLATENT· 5h ago↑ HOT
[AINews] Thinking Machines' Native Interaction Models - TML-Interaction-Small 276B-A12B - advances SOTA Realtime Voice and kills standard VAD
67
airesearchLOB· 6h ago↑ RISING
Popular Go library fsnotify raises supply chain alarms after maintainer access changes
62
devsystemsTC AI· 5h ago↑ RISING
Thinking Machines wants to build an AI that actually listens while it talks
56
aitechVERGE· 3h ago↑ RISING
Sony upgraded its wearable AC so it’s cooler and better at hugging your neck
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






