Aristotle had a word for it.

The judgment the tools left behind.

Sophia knows the principles. Techne knows the procedures. Phronesis knows the moment. It used to come through apprenticeship — long hours next to someone who already had it, absorbing the shape of their judgment by being in the room.

That mode mostly does not exist anymore. The room got distributed and the senior operators got busier in the same decade the tools got extraordinary at producing context and useless at exercising judgment over it. Every increment in production raised the bar on judgment.

Phronesis is a workspace for the part the tools left behind: catching what matters, retaining it, and bringing it to bear at the moment of the next call. Built for operators who want their judgment to compound. Built so the agent they might delegate to has something worth working from.

The first product worked. Then I stopped using it.

Before Phronesis was a workspace on your own disk, I built a hosted context product for product managers. It indexed their documents and brought relevant passages into AI conversations using retrieval-augmented generation and MCP. It worked in production, but I eventually stopped using it in my own work.

Each new conversation still asked the model to reconstruct which facts were current, which decisions had changed, and what mattered now. I needed a maintained account of my work that I could recognize as current.

A simpler, file-based prototype kept the source material beside a working account of what was current, made changes reviewable, and could travel between models. That became Phronesis.

Retrieval finds what was said. Phronesis turns that evidence into a current, source-linked account of what is true now, what changed, and why it matters. Both layers stay on your disk, so the evidence, the current view, and the path between them remain yours.

Read the full origin story.

The moat is yours, not ours.

The workspace you build is yours. The codex you shape is yours: structured Markdown on your own disk, portable to any model, readable with no Phronesis runtime present. Phronesis does not own your work. It is the means by which you own it.

The architecture is engineered against lock-in, not toward it. What you build, you take with you.

Whatever frontier model arrives next is just better fuel for the workspace you have already built. We do not compete on volume. We compete on the gap between volume and judgment, the gap everyone who has tried a second brain has felt and could not name.