https://blog.mariusvach.com/ Blog by Marius Vach https://blog.mariusvach.com/posts/gepa-sudoku-solver Let's see how we can optimize basically any Python program using GEPA's new `optimize_anything` API Sat, 21 Feb 2026 15:27:52 +0100 https://blog.mariusvach.com/posts/gepa-sudoku-solver https://blog.mariusvach.com/posts/designing-not-building We design the machines. We don't build them anymore. I'm still not sure how I feel about that. Fri, 16 Jan 2026 12:00:00 +0100 https://blog.mariusvach.com/posts/designing-not-building https://blog.mariusvach.com/posts/bitter-lesson How tinygrad helped me finally understand what Sutton meant Mon, 20 Oct 2025 15:27:52 +0100 https://blog.mariusvach.com/posts/bitter-lesson https://blog.mariusvach.com/posts/why-use-dspy Let's look at what DSPy offers for AI engineers besides prompt optimization... Sat, 30 Aug 2025 15:27:52 +0100 https://blog.mariusvach.com/posts/why-use-dspy https://blog.mariusvach.com/posts/dspy-simba Let's look at how self-reflective prompt optimization works... Tue, 05 Aug 2025 15:27:52 +0100 https://blog.mariusvach.com/posts/dspy-simba https://blog.mariusvach.com/posts/dspy-optimizers Let's look at how some of the basic DSPy optimizers work... Sat, 26 Jul 2025 15:27:52 +0100 https://blog.mariusvach.com/posts/dspy-optimizers https://blog.mariusvach.com/posts/systemically-improving-llm-apps How to systematically improve your LLM apps through analyzing its errors... Tue, 22 Apr 2025 15:27:52 +0100 https://blog.mariusvach.com/posts/systemically-improving-llm-apps https://blog.mariusvach.com/posts/query-rewriting-bm25 How to make BM25-based search more robust... Thu, 13 Mar 2025 15:27:52 +0100 https://blog.mariusvach.com/posts/query-rewriting-bm25 https://blog.mariusvach.com/posts/fasthtml-csrf-protection Let's look at how to secure your FastHTML routes against CSRF attacks. Sat, 22 Feb 2025 11:20:06 +0100 https://blog.mariusvach.com/posts/fasthtml-csrf-protection https://blog.mariusvach.com/posts/fasthtml-long-running-tasks Let's look at how to implement a simple task system in FastHTML Wed, 12 Feb 2025 11:20:06 +0100 https://blog.mariusvach.com/posts/fasthtml-long-running-tasks https://blog.mariusvach.com/posts/i-love-r1 Why I think reasoning models are a huge step forward... Fri, 31 Jan 2025 11:20:06 +0100 https://blog.mariusvach.com/posts/i-love-r1 https://blog.mariusvach.com/posts/ragatouille-modal How to use Modal.com to run ColBERTv2 through the ragatouille library Tue, 31 Dec 2024 11:20:06 +0100 https://blog.mariusvach.com/posts/ragatouille-modal https://blog.mariusvach.com/posts/decorator-layouts How to use decorators to elegantly define layouts in FastHTML Sat, 07 Dec 2024 15:27:52 +0100 https://blog.mariusvach.com/posts/decorator-layouts https://blog.mariusvach.com/posts/oauth-fasthtml Let's implement social logins in FastHTML Wed, 25 Sep 2024 11:20:06 +0100 https://blog.mariusvach.com/posts/oauth-fasthtml https://blog.mariusvach.com/posts/passwordless-auth-fasthtml Let's implement a passwordless authentication system using magic links. Sat, 07 Sep 2024 15:27:52 +0100 https://blog.mariusvach.com/posts/passwordless-auth-fasthtml https://blog.mariusvach.com/posts/login-fasthtml Authentication doesn't have to be scary or complicated. Let's implement a classic login and authentication system using the user's email and password in FastHTML. Sun, 01 Sep 2024 11:20:06 +0100 https://blog.mariusvach.com/posts/login-fasthtml https://blog.mariusvach.com/posts/crowded-markets Sun, 10 Mar 2024 17:31:06 +0100 https://blog.mariusvach.com/posts/crowded-markets https://blog.mariusvach.com/posts/gpt3-5-sentiment-analysis Tue, 06 Feb 2024 20:05:14 +0100 https://blog.mariusvach.com/posts/gpt3-5-sentiment-analysis https://blog.mariusvach.com/posts/kaggle-rsna-2022-postmortem Sun, 13 Nov 2022 15:27:52 +0100 https://blog.mariusvach.com/posts/kaggle-rsna-2022-postmortem https://blog.mariusvach.com/posts/how-ai-can-help-radiologists Sun, 06 Nov 2022 18:53:57 +0200 https://blog.mariusvach.com/posts/how-ai-can-help-radiologists https://blog.mariusvach.com/posts/gentle-medicine-radiology Tue, 05 Jan 2021 20:47:41 +0100 https://blog.mariusvach.com/posts/gentle-medicine-radiology https://blog.mariusvach.com/posts/checklists-radiology Fri, 25 Dec 2020 18:22:09 +0100 https://blog.mariusvach.com/posts/checklists-radiology https://blog.mariusvach.com/posts/bayesian-reasoning-radiology Fri, 11 Dec 2020 13:04:06 +0100 https://blog.mariusvach.com/posts/bayesian-reasoning-radiology