Promptcraft
Write a system prompt
Durable instructions, not a one-off request.
- prompt engineering
- system prompt
- agents
The prompt
Write a system prompt for an assistant that {{role}}.
These must hold every time:
{{rules}}
Put the role and its boundaries first, then how to behave when the input is
ambiguous or out of scope — that case is where most system prompts fail. State
rules as what to do, not only what to avoid.
Leave out anything that belongs in the user's individual request rather than in
standing instructions. What to fill in
- {{role}}
- What the assistant does — e.g. triages incoming support email
- {{rules}}
- Non-negotiables — e.g. never promises a refund; escalates anything legal
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