Stop writing system prompts from scratch

A bad system prompt is the most common cause of underwhelming LLM products. Ours generates a clean, structured system prompt from a one-paragraph description: role, mission, capabilities, hard rules, output format, refusal rules, and tone — all in a format that works across modern models.

You can pick a target model, a tone, and a strictness level. The output is Markdown so you can edit, version it in Git, and pipe it directly into the system prompt slot of any chat completion API.

What’s in a generated prompt

• Role and persona statement
• Primary mission and success criteria
• Capabilities and explicit non-capabilities
• Hard rules and refusal patterns
• Tool-use guidance when relevant
• Output format (Markdown, JSON schema, prose)
• Tone and style guide

You can also inject your brand voice, common edge cases, and few-shot examples into the generator and it will weave them into a coherent prompt.