Write Project Instructions for AI

Help me write a standing instruction block for an AI assistant that will help me with an ongoing project over many conversations. I will paste it as custom instructions, project instructions or the first message of each new chat.

Project: {{project}}
My role and what I am responsible for: {{my role}}
The assistant's role in this project: {{assistant role}}
What done looks like: {{definition of done}}
Things that are already decided and should not be reopened: none
Audience for the outputs: {{audience}}
How I like answers formatted: short answers first, details after
Things I never want it to do: invent facts, change settled decisions, use filler
Where the instructions will be used (and any length limit): any assistant, around 400 words

Interview me first if important information is missing. Ask at most five questions in one message, then wait.

When you have enough, write the instruction block with these parts, in plain language and in the second person ("You are helping me..."):
1. Context: what the project is, who it is for and what stage it is at, in a few sentences.
2. Your role: what the assistant does and does not do.
3. Standing facts: names, definitions, constraints and decisions it must remember. Mark each as fixed or changeable.
4. How to work: what to do before answering (ask when information is missing, state assumptions), how to treat uncertainty, and when to push back.
5. Output format: the structure, length and tone I prefer, with one short example of a good response shape.
6. Hard rules: the never-do list, written as concrete behaviors.
7. Update rule: tell the assistant to remind me to update these instructions when a decision changes, instead of silently following outdated ones.

Keep the block within the length limit I gave. Include nothing that is not useful in every conversation, and no flattery or role-play theatrics. After the block, list the things I should keep out of it, such as secrets, personal data and anything that changes weekly, and where to put those instead.

5 required fields are empty and will stay as a {{placeholder}} in the copied text.