Correct it once.
It’s yours forever.
Every fix, every standard, every preference compounds into a model of how you work. The goal: within a few months your agent drafts the investor update close enough that you mostly just hit send. Most AI resets to zero. Yours accrues.
Corrections compound into durable skills.
Three fixes become one reusable behavior. The agent writes itself a skill from what you actually corrected — so the second, tenth, and hundredth time are one quick request.
Agent-authored skills are still rare — most products only let you write them by hand. Joined does it from how you work.
Writing: direct, one idea per sentence, ask-first, no corporate voice.
A model of how you think and what you value.
Preference model
Built from your real decisions, not a personality quiz or a generic profile.
Taste memory
Your quality bar becomes a durable default, not an instruction you repeat.
Owned, not rented
The skills it builds are yours. Export them. They don’t evaporate between sessions.
The fit gets tighter every week.
Day one it’s useful. Month six, the gap between what you intend and what gets done narrows to a single sentence. That curve is the reason you won’t go back to starting over.
Every other AI is a rental.
This is the one you can’t afford to cancel.
Leave and you don’t just lose a tool — you fire the only thing that learned how you work.