Personal · 2025 to now · AI agent, designed and coded solo

bre.ai,
a personal AI I
designed and built

One system that reasons across my whole life, seventeen years of it, and shows its work before it asks me to believe it.
Designed and coded solo · 21 tools it can act with · 17 years of journals

At a glance

My role
Sole designer and builder. I made every design call and directed the coding agents that wrote most of the code.
Scope
One app with about thirty small apps inside, an agent that acts through 21 tools on an MCP server I built, and about seventeen overnight jobs.
How it behaves
Small things in my own day, it just does, with an undo. Bigger things, it proposes and waits. Anything that reaches another person, it never sends.
How it is tested
Every night a question set runs on my real data and checks each answer for made up numbers and banned phrases. Almost a hundred of my ratings have become rules it reads each morning.
When and how
2025 to now. Gemini underneath with a scripted fallback, and the journals never leave my Mac.
The one thing
I designed the trust system for an agent that acts on one person’s life: what it does alone, what it proposes, what it never touches, and how every action comes undone.
Context

bre.ai in thirty seconds

This is the app I designed and coded myself. Point at each dot before the story starts.

About 30
small apps reading one picture of me
21
tools the agent can act with
17 years
of journals, kept on my Mac
  1. 1 · The coachThe AI agent. Always on the left, and it can see every tab.
  2. 2 · Six tabsToday, Social, Mood, Appearance, Notes and History.
  3. 3 · One listHabits and tasks ranked the way I really do things, read from plain files on my Mac.
  4. 4 · HealthFilled from one sentence: I say what I ate, it looks up the menu.
  5. 5 · UndoEvery action the agent takes has an undo, right where it happened.
  6. 6 · AskI talk to it the way I type, typos and all.
Enter the password to keep reading
The password is in my application.