Prompt leakage is a warning sign because it means internal instructions, hidden rules, or sensitive design details may be exposed in unexpected ways. Even if the leak is small, it can reveal system behavior that should have stayed private. This matters for both security and product integrity. If users can infer hidden prompts, they may find ways to manipulate them or create outputs the team never intended. Preventing leakage requires tighter prompt design, better separation of trusted and untrusted context, and careful review of what the model might accidentally repeat. A good system keeps the instruction layer as invisible as possible.Prompt leakage noticed
