|Declined||Keegan||T180139 [Story] Support community/volunteer tools around Structured Commons|
|Declined||Keegan||T180197 [Epic] Support needed changes to volunteer tools for Wikimedia Commons and Wikidata that will benefit from operating with structured data on Commons|
|Open||None||T223820 Properly implement structured data access on Commons in Pywikibot|
|Open||None||T213904 Implement file captions in Pywikibot|
Correct me if I’m wrong, but I believe that you can already write captions using wbsetlabel − although, as I understand it, would be an additional API call using the media ID (which is derived from the page_id, which I presume also needs to be retrieved post-upload via an API call).
(Poking @Addshore to correct me if I’m wrong above.)