Why it matters
Context engineering decides what the model reads and in what order. Same retrieval, different assembly, different answers. Order bias is real: first passages anchor generation.
How it works
Structure prompts with stable system rules, authoritative excerpts before supplementary ones, explicit refusal conditions, and labeled citation sections. Test assembly variants in evaluation.
Example
Nintendo places Refund Policy eligibility rules before Help Center how-to steps in context so limits appear even if the model shortens the answer. Prohibited guarantee language stays in a non-droppable system block.
Common mistakes
- 1Dumping chunks alphabetically
- 2Mixing internal and public excerpts without labels
- 3Changing assembly without rerunning regression tests
Definitions are useful. Governed knowledge is better.
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