Empty argument gets encoded as [] instead of {}

[lukasdotcom]

Gemini complains about a list being passed as the arguments instead of an object. It has an unintended side effect that every single empty object/array will be turned into an empty object when json encoded as a function argument.

[kyteinsky]

how about inspecting the output of json_encode and then converting it to an object?
It's only an issue when it's empty, right?

$out = json_encode($toolCall['args']) ?: '[]';
if ($out === '[]') {
    $out = '{}';
}

[lukasdotcom]

That's a much better and simple idea. Technically it might still be an issue if one of the parameters in an argument needs to be an empty object, but I don't think that is common and might not even be possible.

[kyteinsky]

A full blown inspection can be done as well looping over all the properties and converting every empty key-val array [] to an empty object (object) [] but if that case is not possible, this is good enough.

[lukasdotcom]

That also isn't always wanted because I think it is possible to pass an empty array as an argument like below.

{"features":[]}

[kyteinsky]

ah right