Glossary · Phase 1 · Building with LLMs
Prefilling
Writing the first words of the model's reply yourself so it continues from there. Newer models reject it; use structured output instead.
Learn it properly
System prompts and roles · Set behavior once, separately from the conversation. About 25 minutes.
Other terms from the same lesson
- system prompt: Standing instructions that set how a model should behave for a whole conversation.