01
The Short Version
Prompt engineering shapes the instruction given to the model. Context engineering shapes the information environment around the model.
Both matter, but context is usually what makes AI systems reliable over time. A clever prompt can improve one answer. A good context design improves the operating conditions for many answers.
- Prompt: what the model is asked to do.
- Context: what the model is allowed to know and use.
- Reliability comes from designing both together.