This card is for engineer to pick up Matthias work, answer more questions from checklist below, then meet with Danny/S/Nick and Nik and Chad (and other interested developers) to figure out how to get Flow Topic search results in site search.

• Part of https://trello.com/c/nIDJHl8s/

Questions to answer

• how could CirrusSearch index Topic text?
• how would edits & replies to a Topic trigger CirrusSearch reindexing?
• Could intitle:math work for topic's title rather than only the Topic: *S0n4m7q632z8ycpv* page title?
• will CirrusSearch index HTML of pages or wikitext? Note wikitext will match content text expanded using latest templates whereas posts don't use latest templates until re-edited.
• will Topic search work for wikis using Flow but not CirrusSearch extension?
• can relevance ranking of search results prefer topic title, then reply text?
• what about the other Full text search features like prefix and Topic:math ?
• how can we get Nik and Chad to do all the work?
• Should https://trello.com/c/dTRhYBdY be a separate card?
• can site search show topic h2 title instead of Topic: *S0n4m7q632z8ycpv* ?
• can we support existing prefix:Talk:Some_Flow_board to search within topics that appeared on a particular Flow board?
• can we support prefix:Talk:Beta_Features/ to search across all the Beta features Flow boards that are subpages of Talk:Beta_Features?

Trello card: VnlAS6vN

• column: Send to Phabricator - Collaboration-Team board