Lesson 10 · 14 min

Capstone: fine-tune for a specific task

Pull it together. Make the call: prompt? RAG? Fine-tune? Then design the run.

The brief

You're building a feature for a B2B SaaS: "AI-generated weekly summary emails of customer activity". Each email must:

Use a strict structure (greeting, 3 highlights, 1 risk, 1 action item, sign-off)
Match the brand voice — warm but concise, no marketing fluff
Be 120-180 words, no more, no less
Output as Markdown with specific heading levels

You've tried prompting with examples. Format adherence is 75%. Brand voice is inconsistent. The team wants 95%+ adherence.