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Prompting In Layers: Outline First, Then Fill, Never All At Once

By Nigel Guy · 2 min read

The usual approach to a long or structured piece of work is to ask for the finished thing directly — the full report, the full deck outline with speaker notes, the full function with tests. When the structure turns out to be wrong, which it often does, the fix isn't a small edit. It's discarding most of what came back and starting again, because the content and the structure were written together and can't easily be separated afterwards.

The mechanism: Outline, Approve, Fill

1. Ask for a skeleton only. Headings, section names, a one-line description of what each section will cover — explicitly no full prose yet.
2. Review the skeleton against what you actually need. Reorder sections, cut ones that don't belong, add ones that are missing. This is far faster to do against a list of headings than against finished paragraphs.
3. Approve or amend it explicitly. Say which version you're working from — "use this outline" or hand back an edited one — before asking for any content.
4. Fill it in, one section at a time or all at once now that the shape is settled. Either works once the structure itself is no longer in question.
5. Check each filled section against the one-line description it was given in step 1. That description was the brief for the section — use it as the standard to check the result against, not a fresh read of whether it "sounds right."

What to skip

Skip layering for anything that's genuinely one paragraph or one answer — there's no structure worth locking in advance, and the extra round trip is pure overhead. Skip re-outlining on every revision once the structure is approved; revise within the locked shape rather than reopening the whole sequence each time something changes.

Guardrails

• This costs you an extra step before any content appears. For a one-off, low-stakes request, that cost isn't worth paying — save it for anything long enough that a wrong structure would actually hurt.
• An approved outline still needs reviewing once filled. Locking the shape early doesn't guarantee the content inside each section is accurate or well-argued — that's a separate check.
• If you don't yet know what shape the finished thing should take, layering doesn't help — that's a different problem (open exploration), and forcing an outline onto it early can lock in a structure you haven't actually earned yet.

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