Do not start with a headline or a hot take. Start with the screen: asset purpose, revenue source, trading structure, custody, and risk. This guide gives you the practical halal checks before the market tries to rush your decision. A single large language model wired directly to a trading API is a solved problem the wrong way. The right architecture is multi-agent: a Screener that holds the halal gate, a Signal agent that generates entry hypotheses, a Risk agent that vetoes oversized positions, and an Execution agent that places only what survives. Separation of concerns is not just cleaner code — it is the difference between a compliant halal system and one quiet bug away from putting a haram coin into a user's account. We built HalalCrypto multi-agent on purpose. The single-model failure mode If you let one model do everything — read prices, judge halal status, size the position, fire the order — every prompt collision becomes a risk event.…