Custom prompt is the last tab for a reason. It exists for the rare instruction that does not fit anywhere else, most brands never need to touch it.
Custom system prompt
Free text appended to every generation for this Brand Identity. Use it for something specific and narrow, a formatting quirk, a one-off instruction for a launch campaign, not a restatement of Voice & Tone.
Key things to know
- Use sparingly. A strong Voice & Tone plus clear Guardrails is a better lever than a custom prompt for almost everything, reach for this only after those are dialed in.
- Leave it blank by default. An empty custom prompt is the normal state, not a gap that needs filling in.
- Scoped to this identity. Like every other tab here, the custom prompt only applies to projects using this Brand Identity.