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The Unreliable Agent: Why Guardrails Are Not Guarantees Companion Essay Back to Main Article Series Navigation The Great Inversion  |  Fifty Years of Paradigm Shifts  |  Current: The Unreliable Agent  |  The Burning Question Agentic Reliability Companion The Unreliable Agent: Why Guardrails Are Not Guarantees A companion section for The Great Inversion, focused on the operational and security limits of natural-language guardrails in agentic systems. There is a comforting myth forming around AI agents: that if we give them better prompts, stricter system instructions, more detailed guardrails, and a checklist of forbidden actions, they will behave like obedient junior engineers. They will not. The uncomfortable truth is that AI agents are not deterministic programs executing rules. They are ...

Post da serie Historia do Trail Running em Portugal: atletas portugueses em competição internacional de 2009 a 2026 — do Grand Raid des Pyrénées de Carlos Sá ao ciclo recente.

Portugal nos Campeonatos do Mundo de Trail Running: cronologia completa de todas as participações, da ausência dos primeiros anos à estreia em 2015, às duas edições organizadas no país (2016 e 2019), e ao ciclo WMTRC (2022-2025).

Badwater 2013: a vitória de Carlos Sá dependeu de uma equipa de apoio cujos nomes e papéis ficaram por documentar. Este post é um convite à memória vivida de quem esteve lá.

Este post documenta o percurso competitivo de Carlos Sá com base em fontes públicas acessíveis, assumindo explicitamente lacunas de verificação. O foco temporal principal é 2008-2017 (período documentado).

Freita — Memória Fundadora: episódios vividos da UTSF para preservar a dimensão humana da prova com classificação de confiança A/B/C.

A história da Ultra Trail Serra da Freita: de Verdon ao portal do inferno, de Sálvio Nora aos incêndios de 2017 — com os resultados confirmados de 2006 a 2019.

The Great Inversion: How AI Broke the Software Development Model We Spent 50 Years Building Series Navigation Current: The Great Inversion  |  Fifty Years of Paradigm Shifts  |  The Unreliable Agent  |  The Burning Question  |  Watch videos Software Engineering · AI · Industry Analysis The Great Inversion How AI broke the software development model we spent fifty years building — and a playbook for what replaces it April 2026 Infographic version (local asset). In 1982, programming meant typing numbered lines into a BASIC interpreter, praying the GOTO spaghetti would execute before the machine ran out of memory. By 1995, Kernighan and Ritchie's The C Programming Language had become a rite of passage — a book that taught an entire generation to think in pointers, manual memory allocation, and the disciplined craft of structured code. Every line mattered. Every s...