Hashtags must link to a Twitter search with the hashtag as the query
Which url do I have to link to a hashtag?
For example # hoge
plan1.https://twitter.com/search?q=hoge
plan2.https://twitter.com/hashtag/hoge?src=hash
plan3.https://twitter.com/hashtag/hoge
Or any one of the above ok?
plan 2 and plan 3 work, but the way that Twitter's twitter-text library autolinks hashtags, would produce this (instead of your suggested plan 1):
https://twitter.com/search?q=%23hoge