Writing Prompt Generator — illustrative example

INPUT
Ten-minute mystery exercise with two characters and one room.

RESULT
Two strangers find identical keys on a locked desk. Only one remembers entering the room. Write the moment they decide whether to trust each other.

REVIEW
A useful prompt creates a manageable constraint and an unresolved problem. It should invite a decision instead of describing a complete story.

This is a teaching example, not a live execution record.