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AI Prompt Engineering · Lesson

Structuring Huge Prompts

Sectioning and signposting.

Structure Is Navigation

A huge prompt without structure is a wall the model must scan linearly. Structure turns it into a navigable document: sections the model can locate, reference, and reason over selectively. At scale, organization is not cosmetic — it is the primary determinant of whether the model finds what it needs.

  • Sectioning creates addressable units.
  • Signposting tells the model where it is and where to look.

Delimiters That Do Not Collide

Use unambiguous, consistent delimiters to bound sections. They must not collide with content. XML-style tags are robust because they are explicit, nestable, and easy for the model to match open/close.

Pick one convention and apply it everywhere; mixed delimiters confuse boundary detection.

block = (
  '<documents>\n'
  '  <doc id="7" title="Pricing">...</doc>\n'
  '  <doc id="8" title="SLA">...</doc>\n'
  '</documents>'
)

All lessons in this course

  1. Million-Token Context Windows
  2. Lost in the Middle
  3. Structuring Huge Prompts
  4. Caching Long Prefixes
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