Prompt templates

Why fixed templates help

Prompt templates are fixed instructions with gaps that use the same structure for recurring tasks. The benefit is not convenience but comparability. Anyone producing every product description with a newly worded instruction cannot compare two results, because instruction and item changed at the same time.

The second benefit is handover. A template can be explained, reviewed and improved. A pile of free form inputs can be maintained as long as one person maintains it and is lost when that person leaves.

Which parts a template has

• Role: In which capacity the answer is given, for instance as an editor for product copy.
• Task: One sentence describing exactly what should be produced.
• Material: The fields inserted into the template, clearly named and separated from each other.
• Rules: What must never happen, such as invented details, marketing phrases or price statements.
• Form: Length, structure, headings, language. Without form every request returns a different structure.
• Example: A sample result, because an example usually works harder than an extra rule.
• Fallback rule: What to do when material is missing, so nothing gets invented.

How results are compared

Improvement without comparison is a matter of taste. A small set of test cases that stays identical over time makes sense: typical items, difficult items and one case with deliberately incomplete material. Every change to the template is checked against that set and adopted only on a clear improvement.

Assessment is not by preference but by verifiable traits. Three values usually suffice: the number of invented or unsupported details, the number of pieces usable without correction, and the number of rule breaches, meaning violations of the template's own requirements. The first should always be zero, and if it is not, the template has a problem, not the copy.

What to watch in daily work

The most common mistake is a template doing too much at once. Anyone having title, description, attributes and ad copy generated in one pass gets four mediocre results. Several short templates that can be reviewed and improved individually work better.

The second mistake is missing versioning. When a template changes it must be visible which items were produced with which version, otherwise a quality problem cannot be traced. The third mistake is assuming a good template replaces review. It lowers review effort considerably without removing it, and for dimensions, materials and compatibility the check against your own data source remains indispensable.