Today, Anthropic announced Claude Tag, an always-on instance of Claude that lives inside Slack channels. The idea is that it becomes another participant in a group Slack channel where it can read the channel context, participate in threads, and interact with other channel participants almost as if it were just another employee in the group. Anthropic says 65% of its product team's code is now created by its internal version of Claude Tag.

Anthropic says, "Claude Tag is an always-on Claude that works with your team in Slack the way you'd expect a teammate: reading the room, jumping into the thread, and moving work forward."

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Depending on how it's configured, Claude Tag can be solely reactive, or, if ambient behavior is enabled, it can proactively participate in the Slack channel. When users type @Claude in the channel, they can prompt Claude to take on a task, answer a question, or respond. Every user of the channel can see the responses just as they can see everything else in the channel.

Because Claude Tag lives in Slack, Anthropic is modeling it on the Slack environment, which is team-centric. It's a semi-public chat environment in that everyone in the channel can talk to Claude, and Claude can talk to everyone in the channel.

Anthropic calls this mode multiplayer. The idea is that there is a single instance of Claude interacting with the individual instances of each human in the channel. That one Claude instance will know what it said to Bob, what it said to Sue, and also what Bob said to Sue, and therefore can operate based on that common knowledge.