Few-shot template — pattern by demonstration

You want product titles in your marketplace house format.

Before you use the output

• Read the inferred rules before confirming. Rule 2 — expanding to standard product type — was never stated by you and may or may not be what you want at scale.
• Check whether any inferred rule is an accident of your examples. If all three happen to be under 70 characters, the model may treat that as a limit.
• The 'less sure' items are the ones worth confirming explicitly. Promote the ones you want into stated rules.
• Spot-check the first ten real outputs against the rules, not against your general sense of rightness. This is how you catch a rule that was inferred slightly wrong.