I don't think there are any objections relating to this and we have enough implementations so lets ratify and ship it!

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Known implementations

Unchecked means incomplete or an intent to implement has been expressed. The numbers indicate minimum requirements. Any others?

Client (3/1)

• [x] catgirl
• [x] Goguma
• [x] IRCCloud

Server (3/2)

This one is a client-only tag so server implementations are generally less important imo.

• [x] Anope (pseudoclient)
• [x] Matrix2051
• [x] UnrealIRCd (tag whitelisting)

Bots

• [x] BitBot
• [x] Limnoria
• [x] Moon Moon

The only concern I have is do we want to prohibit multi level replies. I would favour doing so, but if not then we might need another tag to indicate the top level of a reply chain. If we do prohibit them, then react would have to override that rule.