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One two-day chat reached 800k tokens and seven eighths of it was never needed again. The guide I wrote for my team: five settings and a few habits that halved the cost per message.
The em dashes, the “delve”, the rule of three. None of it is accidental. A tour of the machinery that makes every model sound like the same person.
A short, opinionated setup guide for any dev who wants the model to actually help, not just talk. Revised for the September 2026 models and tooling.