Project instructions

Instructions that persist

Open the project menu and choose Project instructions. Whatever you write there is injected into every build turn of that project as standing instructions — you set it once instead of repeating it in every message.

Good uses:

• Brand facts — company name, address, opening hours, links that must be correct everywhere.
• Design rules — "primary color is #0E4F3A", "never use stock-photo-style imagery", "German copy, formal Sie".
• Behavioral guardrails — "never change the pricing section without being asked", "all forms must have a privacy checkbox".
• Domain context — what the product is, who the audience is, terminology to use.

How it behaves

• Instructions apply to every subsequent build turn in that project (up to 4,000 characters).
• They guide the build like your prompt does — your explicit message always stays in charge for the turn at hand.
• Editing them takes effect on the next turn; there's no rebuild needed just for changing instructions.

Project instructions are per-project. For steering a single message, magic words or plain prompt text are the lighter tool.