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Rheos does not just paraphrase your prompt. Every post is built on a formula: why you are posting, and how you open. Those are the intent and the hook. Both are optional, and both change the post completely.

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Where you set the formula

The formula sits in Post details, beside the post, on the Formula row. Until you set one it reads Choose intent. Select it and the Formula tree opens — “Intent first, hook if useful.” Pick an intent from the grid and the Hook row underneath fills with the hooks that carry it, marked Recommended for that intent. Clear resets both.
The angle you pick at the start of a post shapes the draft Rheos writes. To change the angle after that, ask for a rewrite in the chat or start a new post — see comments and edits.

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Intent — why are you posting?

Rheos carries eight intents: The intent goes to the model as part of the brief, so it colours the whole draft rather than just the opening. A Sell post and a Provoke post on the same topic read nothing alike.

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Hook — how do you open?

The first line. Rheos carries 36 hooks, each tagged with the intents it serves. The picker shows you every hook that carries the intent you picked. That’s usually between seven and twelve chips, so expect a wall of them rather than a shortlist. Pick Sell and the row starts Offer, Pain Point, Transformation Tease, Direct, DM Hook, Social Proof… Pick Provoke and it starts Number / Stat, Question, Myth / Misconception, Bold Claim, Contrarian… Hooks overlap between intents on purpose. For example, This vs That serves Sell, Educate and Provoke, so the same chip turning up under two intents is not a bug. Hover any chip for a one-line description of what it does.
Try the same topic twice — once with Provoke, once with Prove. Same subject, completely different post. It is the fastest way to see what intent actually does.

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What Rheos decides for you

Intent and hook are the two slots you fill. How the copy is structured and the ask at the end are the model’s call, taken from your brand identity, the intent and the hook. There are no controls for either in the editor. Length is the exception. Select LinkedIn on its own and a Length slider appears above the post body, running from short through medium to long. It starts on medium and sets a soft target the model writes towards. Select anything else, or more than one platform, and the slider is not there. If the ending is not what you wanted, that is a rewrite, not a setting: highlight it and tell Rheos what to change, or ask in the chat for a pass over the whole post.
Last modified on September 27, 2026