Build a prompt library

A prompt library is the point where AI stops being a personal trick and becomes business infrastructure. It is a small, plain document holding your proven prompts for recurring work, each with a name, the prompt itself, an example of good output, and a note on what to review before sending. Ten solid entries outperform a hundred clever ones nobody can find. Structure each entry so a new employee could use it unaided. The name should describe the job, not the technique — "Late invoice follow-up" rather than "chain-of-thought billing prompt." Include the placeholders to fill in, marked clearly, so the user knows exactly what to supply. Include the review note, because the person using the prompt may not know that this particular output tends to invent delivery dates. The library encodes judgment, not just wording. Maintenance is what separates a living library from a stale one. Review it monthly: delete what nobody used, update entries where you keep making the same correction, and promote any ad-hoc prompt used three times into a proper entry. Store it where the work happens rather than in a folder nobody opens, and assign one owner. An unmaintained prompt library quietly starts producing last season's prices and last year's policies. The library's real value shows up during absence and turnover. Any process that only works when one specific person is available is a risk, and prompt libraries convert personal skill into something the business owns. Resist the urge to make entries clever. The best entries are boring, specific, and hard to misuse, because they will be used by someone in a hurry who has not read the documentation. A two-location restaurant group keeps nine entries covering staff scheduling notes, supplier follow-ups, and review responses. When the general manager took two weeks off, the assistant manager produced identical communications without asking a single question.

Key takeaways

• Structure each entry so a new employee could use it unaided.
• Maintenance is what separates a living library from a stale one.
• Those three items let another person use the prompt correctly and safely without being taught.

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