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I don't understand what they mean by "Unfortunately, an undocumented approach to mentioning users — <@username> — no longer functions. Please reference with the user ID format (<@U123>) instead".

Surely they're not saying slack users need to manually type opaque numeric identifiers to properly mention other users? That would be ridiculous.

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If it works the way Discord does it, you can @ a display name and it converts it for you automatically on the tab / auto completion.

That’s the format a bot uses to mention a user. But, yeah, the wording is confusing.

Ah I see. Yeah, still not a fan. As someone else mentioned in the thread, some bots are mainly integration, shuffle content from one system to another. This will break mentions in IRC gateways for instance, no? Or, something Slack might care more about, make it a lot harder to have a mention in a ticketing or project management system trigger a mention in a Slack message.

Yeah it’s definitely a pain. I support a bot that we use for devops and I’m already going through and doing a search/replace op in our commit messages that get posted into slack.

Seems like this is a classic ‘push the work downhill’ thing they’ve done that just costs all the devs who write slack apps.

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