Pragmatic architectural observations, functional programming notes, and product development strategy from Auxil.https://auxil.ai/https://auxil.ai/blog/the-overfit-prompt/https://auxil.ai/blog/the-overfit-prompt/Spoon-feeding a domain-general pipeline against one corpus is overfitting in prose instead of gradients: the engine memorises the domain you built it on. Why the leak enters when you are most careful, and the eval-driven discipline that catches it.Thu, 09 Jul 2026 00:00:00 GMTApplied AI & R&Dhttps://auxil.ai/blog/when-the-cloud-is-the-friction/https://auxil.ai/blog/when-the-cloud-is-the-friction/SaaS used to remove friction from buying software. For enterprise AI sales it now often adds it. Why the cloud became the friction, the deployment alternatives (self-hosted, BYO model, local-first, in-stack), and the architecture that lets one codebase run in all of them.Tue, 02 Jun 2026 00:00:00 GMTSystem architecturehttps://auxil.ai/blog/messy-data/https://auxil.ai/blog/messy-data/The pitch is that AI can shoulder most of the data cleanup, leaving structure as the real problem. The reality is that AI carries one layer of a stack of six, and the rest stays slow, contextual, and human. What AI fixes, what it cannot, and what to build instead.Sun, 31 May 2026 00:00:00 GMTApplied AI & R&Dhttps://auxil.ai/blog/ocaml/https://auxil.ai/blog/ocaml/Quietly, in the background, a language long admired from a distance has been sharpening its blades. OCaml 5 closes the adoption gap with direct-style parallelism and algebraic effects.Sat, 30 May 2026 00:00:00 GMTLanguages & executionhttps://auxil.ai/blog/architecture-spectrum/https://auxil.ai/blog/architecture-spectrum/A practical map of backend architectural choices for Postgres-first systems. Eight flavours from DB-as-API to event sourcing, with the six axes that actually drive the choice: tenancy, async profile, streaming, concurrency, and the LLM-producer wrinkle baked in.Fri, 29 May 2026 00:00:00 GMTSystem architecturehttps://auxil.ai/blog/on-doing-nothing/https://auxil.ai/blog/on-doing-nothing/The case for unstructured idleness as a working discipline. Why boredom is the input most software, startup, and product work is starved of, and why blocks of it are a necessity rather than a luxury.Fri, 29 May 2026 00:00:00 GMTPatterns & practicehttps://auxil.ai/blog/when-things-slow-to-a-crawl/https://auxil.ai/blog/when-things-slow-to-a-crawl/Eleven recurring antipatterns that stop a software team's momentum, across architecture, product, planning, and culture. Field notes with the moves that help climb out.Mon, 25 May 2026 00:00:00 GMTPatterns & practicehttps://auxil.ai/blog/confused-deputy/https://auxil.ai/blog/confused-deputy/Prompt injection is the confused-deputy bug in modern dress. The architectural fix is older than the problem: authority travels with the request, narrowed at every hop, and decided by deterministic policy, not by the model.Fri, 15 May 2026 00:00:00 GMTApplied AI & R&Dhttps://auxil.ai/blog/batting-stance/https://auxil.ai/blog/batting-stance/Three layers (SaaS chassis, engine, vertical) and two pivot points between them. The strategy that keeps the cost of swinging again bounded, for founders still in the search problem.Sun, 10 May 2026 00:00:00 GMTSystem architecture