BUR #37856 has been rejected.
remove implication idolmaster_live_for_you! -> idolmaster_(classic)
remove implication idolmaster_sp -> idolmaster_(classic)
create implication idolmaster_live_for_you! -> idolmaster_1
create implication idolmaster_sp -> idolmaster_1
Proposing to turn idolmaster 1 into a tag for the 1st vision idolmaster games that gets implied by idolmaster live for you! and idolmaster sp. 1st vision is just the first era of idolmaster before the characters were redesigned for idolmaster 2 and the anime onward. There's a lot of content overlap that I think having a tag for idolmaster 1 that excludes L4U and SP isn't necessary, which I'll elaborate on.
L4U shares a lot of content with idolmaster 1 since it just exists to be a rhythm game/live viewer for all the songs from that game. It has all the same costumes available, the characters still have the exact same designs, there's really no story events to even make art of so the only difference is that more costumes are available. I think anyone searching for idolmaster 1 because they like the characters' old designs wouldn't mind seeing art of them in just a few extra costumes, some just being recolors of the main costumes from idolmaster 1, and it's likely that some art shows costumes from both games together like post #293994. And some old art that shows costumes originating from L4U is still only tagged as idolmaster 1 instead, since most people probably don't recognize it as being a separate thing.
SP is partially a port of the first game, since the gameplay and communication events are all the same. The major differences are that characters wear new casual outfits (that are selectable in L4U too) but otherwise still have the same designs (hair/face), there's some more new costumes, and that Hibiki and Takane exist as rivals at another company instead of as part of 765pro (and that's their only appearance in 1st vision). Otherwise it still has all the standard costumes from idolmaster 1, for example post #414855 the pink costume is from idolmaster 1 while it's depicting a situation from SP, so if you were searching for idolmaster 1 you'd probably want to see this based on the character designs and costume.
2nd vision makes up the majority of the fanart of the 765pro allstars and differs pretty heavily from 1st vision, which is why I think having a grouped together 1st vision tag is useful to search it separately. In 2nd vision characters were redesigned, costumes from 1st vision almost never reappear, Hibiki and Takane are part of 765pro from the beginning, and Million Live is part of 2nd vision.
I considered proposing making a new 1st vision tag that gets implied by idolmaster 1, L4U, and SP instead of reusing the idolmaster 1 tag, but that doesn't really make sense to me since there's no situation that art should be tagged as 1st vision without at least one of the three games being tagged.
For post counts, idolmaster 1 is at 4033, idolmaster live for you! is at 493, and idolmaster sp is at 165, so it would only make up a small portion for the latter 2 to be added to the former anyway.