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HomeDocsClaude Documentation 2 Oct 2026
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Troubleshoot Claude Tag in channels and DMs changedclaude-tag/users/troubleshooting

Nearest release: v2.1.288, published under an hour before upstream edited the page. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.

Upstream edited this page at 2 Oct 2026 19:07 UTC, give or take a minute or two: the time comes from Anthropic’s own sitemap rather than from a commit. This site recorded the change at 2 Oct 2026 19:07 UTC.

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### Agents can only be added at the start of direct messages

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701701 
702702Start a private channel with the same members instead.
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704### Agents can only be added at the start of direct messages
705 
706**What you see**
707 
708You mention `@Claude` in a DM you already have with someone else. Slack shows this notice, and Claude doesn't reply:
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710> Agents can only be added at the start of direct messages.
711 
712**What it means**
713 
714Slack adds an agent such as Claude to a DM only when the DM is created, so your mention never reaches Claude. The rule is Slack's rather than a Claude setting, so your Claude admin can't change it.
715 
716**How to resolve**
717 
718Choose where to continue with Claude:
719 
720* **In a private channel with the same people**: Slack's notice offers to move this conversation to a private channel that includes Claude. Take that option, then mention `@Claude` in the new channel. If Claude doesn't answer there, or answers with a setup notice, see [Mentioning @Claude does nothing at all](#mentioning-@claude-does-nothing-at-all).
721* **In a one-to-one DM**: message Claude directly.
722 
704723## Related resources
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706725* [Control when Claude Tag responds](/docs/claude-tag/users/when-claude-responds): what makes Claude reply without an @-mention, and the controls that turn those replies off
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