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The Claude Habit Worth Building Before Any Other

By Nigel Guy · 3 min read

Ask for something, get an answer, use the answer. That's the default loop, and it works often enough that the missing step in the middle — actually reviewing what you got before you act on it — never gets built as a habit at all. Most of the advice about using Claude well is about how to ask better. Comparatively little of it is about what to do with the answer once it arrives, which is the step that actually determines whether a mistake reaches the outside world.

The mechanism

1. Read the whole answer, not just the part you were hoping for. It's easy to scan for the conclusion you wanted and skim past a caveat, a hedge, or an "I'm not certain about this part" sitting a paragraph earlier. That sentence is often exactly the one worth reading twice.
2. Ask yourself what you'd check if you didn't trust this at all. Not because you assume it's wrong — because the answer to that question tells you which specific parts actually carry weight and deserve scrutiny, rather than treating the whole thing as uniformly solid or uniformly suspect.
3. Check the parts that are cheap to check and expensive to get wrong first. A number, a name, a date, a specific claim about something you can verify in thirty seconds — these are the highest-value places to spend your review time, disproportionate to how long they take.
4. Notice your own confidence, separately from the answer's. Fluent, well-organised writing produces a feeling of trust that isn't actually evidence. Naming that feeling explicitly — "this sounds right, do I actually know it's right?" — is most of what separates a genuine review from a rubber stamp.
5. Decide, explicitly, what level of review this particular answer needs. Not everything needs the full treatment. A quick brainstorm and a client-facing figure warrant completely different amounts of scrutiny, and deciding that up front is part of the review, not a shortcut around it.

What to skip

Skip building elaborate verification systems before this habit is solid — a two-minute number audit, an error log, a comparison mechanism are all worth having, but they're refinements on top of the basic habit of actually reading and questioning what you were given, not substitutes for it. And skip treating review as something only for high-stakes work; the habit is worth building precisely because it's cheap enough to apply by default, not because every single use demands it in full.

Guardrails

• This habit reduces the rate at which mistakes slip through unnoticed. It doesn't eliminate them, and it doesn't make Claude's output correct — review is a check on what you do with an answer, not a fix for the answer itself.
• The habit has to be genuinely automatic to work — if reviewing feels like an extra chore you do "when you remember," it will get skipped exactly when you're busiest, which is when it matters most.
• Nothing here replaces domain expertise for anything specialised — a careful review from someone who doesn't know the subject will still miss what an expert in it would catch immediately.

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