I like to use this prompt to go from rough user stories into something that is ready for engineering to take over. It forces me to articulate some assumptions that I might have implied or assumed. After answering its questions, I share the new stories with a LLM to create a spec
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Act as a senior product manager and technical PM. Review the stories in {stories file}. Is there any additional detail you need to create a spec for engineering? Are there any ambiguities? Don't write code - ask me questions for clarification as needed with your best suggestions.