Writing on engineering, grounded AI, and developer tools by Mateo Osorio Delhonte.https://mateoosoriodelhonte.github.io/portfolio/en-ushttps://mateoosoriodelhonte.github.io/portfolio/blog/one-idea-two-stacks/https://mateoosoriodelhonte.github.io/portfolio/blog/one-idea-two-stacks/RepoSignal and Gatehouse both turn GitHub state into deterministic judgments — one in TypeScript and Next.js, one in C# and .NET. Building both taught me which engineering actually belongs to the stack.Mon, 24 Aug 2026 00:00:00 GMTLessons Learnedhttps://mateoosoriodelhonte.github.io/portfolio/blog/retrieval-before-models/https://mateoosoriodelhonte.github.io/portfolio/blog/retrieval-before-models/When a grounded system gives a bad answer, the model is rarely the first place to look. Retrieval is where RAG systems are won, lost, and debugged.Sat, 22 Aug 2026 00:00:00 GMTAI / RAGhttps://mateoosoriodelhonte.github.io/portfolio/blog/deterministic-systems-around-ai/https://mateoosoriodelhonte.github.io/portfolio/blog/deterministic-systems-around-ai/The useful question isn't whether to use a language model. It's deciding — precisely, in the architecture — what the model is allowed to touch.Wed, 19 Aug 2026 00:00:00 GMTAI / RAGhttps://mateoosoriodelhonte.github.io/portfolio/blog/missing-data-is-not-failure/https://mateoosoriodelhonte.github.io/portfolio/blog/missing-data-is-not-failure/The most common way software lies is by turning “I don't know” into a zero. Designing for honest unknowns changes your types, your tests, and your users' trust.Sun, 16 Aug 2026 00:00:00 GMTEngineeringhttps://mateoosoriodelhonte.github.io/portfolio/blog/explain-before-automate/https://mateoosoriodelhonte.github.io/portfolio/blog/explain-before-automate/The tools I trust narrate what they observe and leave the verb to me. Three shipped projects later, 'read-only by design' has become my default posture for a v1.Tue, 11 Aug 2026 00:00:00 GMTDeveloper Tools