Every session your AI opens is a blank slate. You explain the project again, it suggests something you already tried and threw away, and the reason you threw it away is gone. That is not a memory problem you can fix by talking more.
At the start of a session your AI opens the project file and knows what shipped, what broke and what was already decided.
Every decision, every failure and its cause go in the same turn they occur, not at the end of the day when they are already half forgotten.
The file is plain text on your disk. A closed window, a lost session or a new laptop changes nothing.
Your AI reads the file when it starts and writes to it as it works.
One command installs the habit, so it happens without you asking.
Ask where you fixed something before and it finds the entry across every project you ran.
It is a plain file: it survives a closed window, a lost session and a new laptop.
It is a file, not a service: nothing is stored on our side and nothing needs an account.
It does not write your code. It keeps the reasons behind it.
Journal
Never explain your project twice. Your AI picks up exactly where you left off, every time.