@dreev, it might be worth putting a blurb on the “update” api pages that explicitly only calls out what (if any) attributes can’t be updated and says that the rest can—right now there’s a list of the “special” ones like roadall, but it also includes a few “normal” parameters (like title) that make it look like ones not mentioned (like deadline) can’t be updated.
Also, lol, at first I thought I’d found a bug here, but actually it was just that I had genuinely forgotten to update this goal’s deadline, which I randomly selected as an example, when y’all introduced adjustable deadlines for toggl goals! 