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Unexpected token o in JSON at position 1: why it happens and how to fix it
If you have ever seen Unexpected token o in JSON at position 1 (or "[object Object]" is not valid JS…
Comparing Edge and Serverless Approaches for SaaS Tools
When I first started building my SaaS, I made the classic mistake of putting absolutely everything i…
Why Solana addresses almost never start with R
We made a million Solana keys and counted their first characters. Nearly 19 in 20 addresses start wi…
Extras, tourist tax and arrival emails for a vacation rental on Wix
Full disclosure: I built the app described in the last section. The first sections are about the pro…
Let the Score Meter Set the Count-In, Not Just the Label
I build Pianory, a browser-based piano practice app. AI helped draft this article; I checked the imp…
My Harness Reported 0 Findings on 100 Files. All 100 Were Ignored.
I ran fourteen lint rules over 100 files and got back zero findings. Every rule silent, clean sweep,…
Upstream Shipped a Corruption Fix. Does Updating Repair a Damaged File? How I Decided What My Tool Should Claim
Audacity 4.0.2 came out on 2 November 2026, a fix release ahead of 4.1. I maintain a browser tool th…
A lost response is not a failed write: design retries around intent
Your server creates a resource, commits the transaction, and sends a response. The connection drops …
A Tiny Regex Bug in Adyen's Java Library, and How My Fix Shipped in SDK v42.0.0
In my last posts I wrote about why I started open source and about my first merged PR in Zalando Log…
Why Has Lighvan Cheese Become So Expensive?
Many people are surprised when they see the price of authentic Lighvan cheese and ask: "Why is it so…
ChatGPT sent 116 people to one of our pages last week. The week before, it sent 7.
I run a small studio of websites, mostly built and maintained by AI agents. One of them, Monitoring …
The Workflow That Sent the Right Message to the Wrong Person: Row-to-Recipient Mapping in n8n
This is part of my build-in-public series on running LLM workflows in n8n in production. Everything …