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Prompt engineering is over.
Look at the data. One tool scored 74.2 percent. Another scored 69.4 percent. Both used the same model.
The gap came from the system.
An agent equals a model plus a system.
If you do not build the model, you build the system. This is context engineering.
It is the act of shaping every token in the window.
A production system needs seven parts:
- System prompts and config files
- Tool descriptions and schemas
- Context window policies
- Memory architecture
- Feedback loops
- Hooks and middleware
- Observability and traces
Use the Ratchet Pattern.
When your agent fails, find why. Add a rule to your system. Now the agent never makes the same mistake.
Stop using one agent for everything.
Split tasks. Use an orchestrator to lead. Use sub-agents to execute. Use a reviewer to check.
This separates the work. It stops the model from getting confused.
A decent model with a great system beats a great model with a bad system.
Build a better system. Your agents will win.