> There's a much cleaner way to do this - a shared helper

disagree, then you end up with something this this

function checkAll(target, conditions) { return Object.entries(conditions).every(([path, expected]) => { const value = path.split('.').reduce((o, k) => o?.[k], target); return typeof expected === 'function' ? expected(value, target) : value === expected; }); }

and const ok = checkAll({ user, account }, { 'user.isActive': true, 'user.isSuspended': false, 'account.status': 'open', 'user': u => u.hasPermission('read'), // predicate for the trickier bit });

how is that better?

No, you've created a generic condition checker, which is where all of your complexity comes from. Further, you've left the actual check to be duped in all callers.