Exposing argument conversion publicly would be a good idea. Not exactly sure what's the best API for that, though. Anyway, something that could be added in RF 5.0.

Could you @aaltat clarify this request a bit more? I checked the linked Browser library issue and notice it was fixed already. Was this issue not relevant or was there some existing way to handle conversion?

I removed this from RF 5.0 scope because we'd like to get that release out ASAP and because I'm not sure what we actually should even do to address this. If there's something concrete to do, this issue can be added to RF 5.1 scope.

I don't actually understand the whole need for argument conversion in Browser side. AFAIK it uses BuiltIn.run_keyword and it should handle conversion based on the type information of the called keyword automatically. For example, if I have a dummy library like

from robot.libraries.BuiltIn import BuiltIn


def kw1(arg: int):
    assert arg == 42


def kw2(arg):
    BuiltIn().run_keyword('kw1', arg)

I can use it as follows and 42 is converted to an integer correctly.

*** Test Cases ***
Example
  kw2    42

BuiltIn.run_keyword is a pretty bad API for running other keywords, though, as #4237 explains. If we add a new and better API, need to take conversion into account with it.

When keyword originates from the same library, arguments are not problem. But keyword is not from same library arguments are problematic because args can be almost anything and then it get pretty complicated how that works. Or is there some shortcut to happiness which I do not see?

It seems that #4942 proposed the same thing and it was implemented in RF 7.0.

@aaltat agreed. Closing.