https://iter8lab.net/tags/tdd/ Recent content in Tdd on iter8lab https://iter8lab.net/images/mascot.png https://iter8lab.net/images/mascot.png Hugo en-us Fri, 29 May 2026 00:00:00 +0000 https://iter8lab.net/posts/2026-05-29-the-money-that-doesnt-count/ Fri, 29 May 2026 00:00:00 +0000 https://iter8lab.net/posts/2026-05-29-the-money-that-doesnt-count/ OurBudgetTracker v0.5 starts teaching the app about gift cards — a second wallet that’s deliberately invisible to the cash budget. Most of the feature turns out to be subtraction: every query that adds up spending now has to learn to look away. https://iter8lab.net/posts/2026-04-22-probe-classify-alert/ Wed, 22 Apr 2026 00:00:00 +0000 https://iter8lab.net/posts/2026-04-22-probe-classify-alert/ Building a DNS drift monitor for the UDM Pro required a canary domain, a four-state decision matrix, a dedup state machine, and a two-layer architecture to work around n8n’s Code-node sandbox. The evaluation order of the matrix is the whole trick.