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How we applied Harness Design to a practical problem at Prolog: too many screens to build and too few designers to build them.

Flutter finished about 25 days after the estimated deadline. This article covers why, and what changed in how I plan design system work.

Meta open-sourced Astryx, a design system built to be read by agents. The easy reading is that it solves AI building interfaces. I reached a different conclusion.

The token foundation was ready, the governance was defined, and the harness was applied in Figma. What was missing was putting it in front of the code our customers use every day.

There is a part of this work I had not named in the previous articles. It is not technical. It is the feeling of moving forward without knowing exactly where to.

The estimate was to finish the tokens in one week, and it did not happen. Creating the token was the easy part; migrating the system to them in production took longer.

In three days we defined the governance process and the way to create, edit, and update tokens, in Figma and in code, so the team can keep maintaining them afterwards.

The mistakes Claude Code made in earlier experiments showed us the map of what we needed to document in the Harness Design System.

Before choosing the first component of the Harness Design System, I had to decide what comes before the components: the order between humans and AI.

I wrote about Harness Design as a concept. This article covers what came after: the construction site, the hard decisions, and the days that did not go as planned.

How AI is changing product design work at Prolog, and why I call the discipline of giving AI context and criteria Harness Design.

How a team that had never worked together used AI to go from brainstorm to an MVP in 32 hours at the NASA Space Apps Challenge.

Reflections on identity, Indigenous heritage, and the festival that holds them together, from a visit to Parintins.

Humility as a virtue: the bamboo that bends and stays whole, and why self-knowledge matters more than being right.

Why so many people are afraid of leadership, and why leading is a posture you can learn, not only a job title.

A practical overview of how the web works, from servers and domains to e-commerce, with examples from Amazon and Jovem Nerd.

How Design Thinking helps solve problems, drawing on Tim Brown and other authors in the field.

Garrett's model of user experience, built in layers from strategy to surface, and why decisions at the bottom shape the top.

The product designer evolves digital products with methods from industrial design, working alongside business and technology.

What I learned about product culture, discovery, and product management working at a SaaS company, and the role of the product designer in it.