Examples for Format & Edge Cases

Instructions tell Claude what to do. Examples show it exactly what the output should look like.

Few-shot prompting means dropping 2-4 targeted examples into your prompt. The model generalizes from them - it doesn't just copy them back. In this lesson we use examples for two jobs: pinning the output shape and clarifying tricky edge cases.

These two jobs are where few-shot earns its keep: consistency, output format, and reducing hallucination on the weird inputs.

Imagine you ask Claude to extract a date. Sometimes you get 2026-06-10, sometimes June 10, 2026, sometimes 10/06/2026. Every variation breaks the code that consumes the output.

A prose instruction like "return the date" is ambiguous. Vague guidance produces vague consistency. The fix is to show the exact shape you want instead of describing it.