On Sat, Feb 17, 2018 at 4:33 PM, Brian Wolff <bawolff@gmail.com> wrote:
https://en.wikipedia.org/w/api.php?action=query&list=categorymembers&cmtitle=Category:WikiProject_Democratic_Republic_of_the_Congo_articles&cmlimit=max seems to work fine.

If i were to guess why its not on list=projectpages, id say that wikiproject democratic republic of the congo is not a full on wikiproject itself but just a subproject of wikiproject africa.

That would be the case. list=projectpages depends on something using the {{#assessment:}} parser function to "tag" the page with the project. On enwiki this is typically done by Template:WPBannerMeta (specifically, Template:WPBannerMeta/core), but that template (currently) just does it for the main project, not for task forces.

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Brad Jorsch (Anomie)
Senior Software Engineer
Wikimedia Foundation