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
One of Meta’s big legal reckonings just ended in a settlement
After back-to-back losses in trials grappling with its impact on teens' mental health, Meta just settled what was supposed to be its next legal battle with Kentucky's Breathitt County School District. Google's YouTube, Snap, and TikTok all recently s
VERGE · 4m 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· 4m ago↑ RISING
One of Meta’s big legal reckonings just ended in a settlement
42
techsystemsTC AI· 1h ago↑ RISING
Trump delays AI security executive order: ‘I don’t want to get in the way of that leading’
56
aitechCF· 1h ago↑ RISING
Announcing Claude Compliance API support with Cloudflare CASB
60
systemswebWIRED· 36m ago↑ RISING
Mustard Made Storage Lockers Are on a Rare Sale Through May 31
40
techVERGE· 1h ago↑ RISING
Bungie gives up on Destiny
42
techaiLOB· 3h ago↑ RISING
Internships for early university / no former employment
62
devsystems✦ /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






