02 / Sessions & Context
System prompt
The standing instructions attached to every single request. The agent’s job description: stable across a session, and the highest-leverage text in the whole system.
How you’ll hear it
“Who decides its tone of voice?”
“The system prompt. It goes out with every single request.”
Avoid
Treating the system prompt as a one-off setup task that nobody owns.
The longer version
The system prompt is the standing set of instructions sent with every request: role, tone, rules and limits. It is the highest-leverage text in any AI product, and it deserves an owner, version control and testing like any other critical asset.