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Notes on building AI software.

Practical, plain-language notes from the team at Foldox on shipping AI and web products.

  • 7 October 2026 · 4 min read

    Start with an eval set, not a prompt

    Before you tune a prompt or swap a model, write down what a good answer looks like. A small test set does that.

  • 7 October 2026 · 4 min read

    The right model for each task

    One model for everything is easy to set up and hard to defend. Matching the model to the task is usually cheaper and better.

  • 7 October 2026 · 4 min read

    Answers that cite their sources

    A chat assistant is more useful when it shows where each answer came from, and says so when it does not know.

  • 7 October 2026 · 4 min read

    Keeping AI features fast on the web

    Model calls are slow compared with normal web requests. A few habits keep the page feeling quick.