Juan Reyero

As we increase our reliance on AI, decoupling intelligence from organization will become vitally important.

For developers who have fully embraced AI agents, productivity is no longer the bottleneck.

The simplest improvement you can make to your agentic programming workflow is to run two agents instead of one.

Note added on 2026-05-08: I am moving away from beadhub.

TL/DR The conventional wisdom is that AI will reduce the demand for programmers.

Alias-first LLM routing with lockfiles llmring decouples code from model IDs.

Superseded by llmring llmbridge has been superseded by llmring, which provides a cleaner architecture without database dependencies. llmring offers: Alias-based routing with lockfiles Registry-driven model discovery No database requirement Better separati…

A PostgreSQL async library for modular applications pgdbm allows you to build database-backed libraries that work in any deployment context.

Engineer, programmer and founder.

A Python library for date-aware currency operations Updated 2025-08-15: v2.x with DM factory, robust fallback for historical rates, and SQLite/PostgreSQL serialization helpers. dated-money represents monetary values with an optional date and performs conv…

Note added on 2025-07-28: It’s been two years of programming with and for LLMs.

In the previous chapter we saw how to interact with Python.

A leanpub-optimized markdown exporter for org-mode Note: This is the original ox-leanpub exporter that I created in 2014.

So far we have been talking to the shell, and our programs have been a sequence of commands that the shell has executed one after the other.

Programming is a natural extension of the types of conversation that we’ve been having with the computer.

Remember how we said that everything is text (it was not strictly true; images, videos, songs and compiled programs are not text… but most of what we are talking about in this booklet is).

Most of the tools you’ll be using in the terminal, including those presented in the previous chapter, were designed by the people who created UNIX back in the late sixties and early seventies.

Learning only happens with practice.

There is a better way to deal with computers.

How learning about the brain could improve meetings Go directly to the proposal for conducting meetings if you are in a hurry.

Tinkering: prototype your way out of uncertainty Ten years ago I found myself near Portland talking to Bill, a brilliant colleague who was working at one of HP’s printer divisions.

I enjoyed how the 3.16 section of the Stanford Artificial Intelligence class presented the Bayes theorem.

Note added in 2021.

I still remember my first fountain pen.

We cannot predict how the development of something large and complex is going to play out.

Note: This project is no longer actively maintained (last updated 2014).

A Python library for computing with units Updated 2025-01-28: magnitude has been modernized with full type hints, improved error handling, and is available on PyPI. magnitude implements efficient computation with values with units.

During the last three years I have managed a team of engineers doing ink-jet printer design at HP’s R&D lab in Barcelona.

This is a very rough attempt at deriving useful conclusions from the equations of motion of a unicycle.

By Juan Reyero, Jaime Fernández and Utpal Sarkar.

Llega de pronto el día en que ya te aguantas en el monociclo.

Cuando ya eres capaz de ir de la mano con naturalidad

Cuando estés seguro de haber dominado los primeros pasos puedes

Cuando ya has aprendido a subir con la ayuda del compañero (o,

Cuando tengas una cierta soltura en el ejercicio de la caída

Caerse del monociclo no suele ser un problema.

Es importante que lleves el monociclo bien ajustado.

Menciono varias de las partes del monociclo, intentando llamar a cada cosa por su nombre.