Open with the problem you are solving, not a feature list. Which people will use this, how often, and llm application development what does the process look like without it outsourcing company? An estimator who grasps the purpose will suggest a cheaper route to it; a team that receives only the requirements as given will price your assumptions along with the work.
Describe the scope as short scenarios: a walk through each important path. Just as important, state explicitly what you are not building. An explicit exclusion list prevents more disagreement during acceptance than the rest of the brief combined. Indicate as well which contract model for software development items are decided and which are still under discussion — honest teams price those differently, and concealing the open questions helps no one.
List the constraints. The list covers existing systems the software has to talk to, the data you already hold and its condition, compliance requirements, user volumes, target platforms and infrastructure that is already decided. If there is a hard date, say why: an experienced team will often cut the right scope to hit it, provided they hear about it early.
Write down what the word done means for each item. Clear acceptance criteria do not require any formal notation: a plain-language note stating what must be true when the feature works is enough. That one addition shortens the sign-off process by a surprising margin and closes off the most common source of disputes.
Finally, say what you expect back. Require a breakdown by feature or module, the assumptions used, the main risks and a low number and a high concurrency laravel vs wordpress number. Treat a wide range as information, not evasion: it normally identifies where your description is thin. At that point clarify that area and ask again — the next version will be the one worth planning around.