[Jetpack AI] Better prompts

We need to work on prompts:
- Make it not stop mid-sentence #28994
- Provide better output

Here is some intel gathered for it:
pesk38-1m-p2

Start by reviewing the related issue #28994 and the gathered intel `pesk38-1m-p2`. Define how prompts should avoid stopping mid-sentence and what constitutes better output; the work is done when both prompt goals have clear, testable outcomes.

Written by the indexing model from the issue text.