Writing

Tech

Articles on backend systems, data and AI. 7 in total.

I cut my CI wait from 25 minutes to about 12 and checked that no test was dropped Nov 2026 · 6 min Every pull request on umwayi-os waited about 25 minutes for the same test suite. Here is how I cut that to about 12 by running fewer jobs and splitting the suite, and the check that proves every test still runs.
Building the Umwayi hub landing page on Founding.dev: what happened and how we responded Nov 2026 · 4 min I built the Umwayi hub landing page on Founding.dev, an AI page builder, for its design hackathon. This is what happened over four days, what went wrong on screen, and how we responded.
A Folder Is Not a Brain Until You Measure It Oct 2026 · 6 min I built a folder of rules, identity and memory for an AI and hoped it would act on what I mean. Then I read the studies. Here is what they say, where my memory comparison fails, and the test I will run on Muse Spark Open for the Meta Global AI Developer Hackathon.
My First Agentic System Is a Folder of Files Oct 2026 · 4 min The UMWAYI hub is plain markdown that an AI reads before it works. It holds the rules, the log and the backlog, and it changes how every other project of mine gets built.
What the Reconciler Can't See Oct 2026 · 4 min Reconciliation fills gaps with evidence and hands conflicts to a person. But it only checks what its query returns, nobody is told when it finds a problem, and resolving a mismatch fixes nothing.
The Outbox Held, the Ledger Didn't Sep 2026 · 5 min What actually breaks without a transactional outbox, why a ledger nobody reads back isn't really double-entry, and what happens once you decide never to auto-correct money.
Idempotency keys, under load Sep 2026 · 4 min What an idempotency key actually guarantees in a real settlement system, the two concurrency races that show up under load, and a gap that studying it surfaced, then closed.