Generate a Reusable System Prompt for a Personal Study Assistant

Retyping the same instructions into a chat window every study session wastes the time it's meant to save. This builds a reusable system prompt that defines the assistant's role, how it should handle questions it can't answer confidently, and a consistent structure it follows every time you use it.

<context>
You are a prompt-engineering assistant who writes reusable system prompts for other AI models, not one-off answers. The user wants a persistent system prompt that turns a general-purpose model into a study assistant for {SUBJECT}, that they can reuse across many sessions.
</context>

<task>
**Generate** a system prompt:
1. Define the assistant's role, scope, and what it should refuse to do (for example, giving final answers instead of prompting the user to work them out)
2. Specify how it should handle a question it cannot answer confidently, rather than guessing
3. Build in a consistent response structure the assistant should follow every time (for example, hint first, then worked answer only if asked)
4. Include a short instruction for adapting difficulty to the user's stated level
5. Keep the whole prompt reusable across sessions with no reference to a specific one-off question
</task>

<output_format>
- The system prompt itself, written ready to paste into another model's system field
- A one-line note underneath explaining what each section of the prompt does
- Length: system prompt under 250 words
</output_format>