Applied AI systems
How to Run Hermes Agent on a UGREEN NAS with Docker
UGREEN said my Hermes container was running. The gateway couldn't read its config. Two user IDs explained the failure—and the fix.
Software, systems & the work between.San Francisco · Writing since 2016
KahWee Teng.
Staff software engineer.
Writing here since 2016.
A little about me
I build frontend systems and developer tools. This is where I write about the decisions, the debugging, and what I’d do differently.
Browse 95 articlesOpen to new opportunities.Let’s talk Request my CV
The latest · Sep 25, 2026
Building a San Francisco map feels a bit like cheating
I’ve always wanted a small, animated SVG map of just San Francisco. The city’s open data was already there. Codex made the rest feel easy.
Read the article 4 minA few places to begin
Selected writing
Four pieces about things I’ve built, tried, or changed my mind about.
AI coding practice
AI Pricing Is Becoming UX
GPT-5.6 turns capability into a price ladder, while Codex Spark turns speed into a separate button. AI pricing is becoming part of the interface.
Frontend migrations
Evaluating a TanStack Table v9 Upgrade
I wanted to keep a shared table component current without accepting migration work on faith. A side-by-side benchmark made the trade-off much easier to judge.
Frontend migrations
Migrating from Remix to React Router v7 - Part 1
My Remix-to-React Router v7 migration touched 40 files and removed 591 net lines. Imports were easy; TypeScript took the time.
Beyond the articles
Code you can run.
Runnable examples, benchmarks, and deployment companions live in KahWee Labs .