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HomeDocsClaude Documentation 22 Sep 2026
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Restrict where Claude Tag operates changedclaude-tag/admins/restrict-access

Nearest release: v2.1.280, published 7 hours 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 22 Sep 2026 23:24 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 22 Sep 2026 23:37 UTC.

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128128### Block or auto-join channels by name
129129 
130**Channel name rules** steer where Claude works by channel name instead of channel by channel. The rules sit in the **Advanced** section of the **Default Slack access** panel and of each workspace scope's panel at [`claude.ai/admin-settings/claude-tag`](https://claude.ai/admin-settings/claude-tag), as two pattern lists:
130**Channel name rules** steer where Claude works by channel name instead of channel by channel. The rules sit in the **Advanced** section of the **Default Slack access** panel and of each workspace scope's panel at [`claude.ai/admin-settings/claude-tag`](https://claude.ai/admin-settings/claude-tag), as a **Blocked channel patterns** list and an **Auto-join channels** table:
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132132* **Blocked channel patterns**: Claude won't read or respond in a channel whose name matches, even if someone invites it there. When it's added to such a channel or @-mentioned in one, it posts a notice that an admin has blocked it there, and otherwise stays silent.
133* **Auto-join channel patterns**: Claude joins a public channel whose name matches when the channel is created or renamed. Private channels still need an invite. To add Claude to an existing channel, invite it as usual.
133* **Auto-join channels**: Claude joins a public channel whose name matches one of its patterns when the channel is created or renamed. Private channels still need an invite. To add Claude to an existing channel, invite it as usual.
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135A pattern is written in lowercase, like Slack channel names, plus two wildcards: `*` matches any run of characters and `?` matches exactly one. `inc-*` matches every channel whose name starts with `inc-`, and `*-confidential-*` matches any name containing `-confidential-`. Each list holds up to 50 patterns of up to 80 characters.
135Each row of the **Auto-join channels** table is one pattern, added with **Add pattern**. A row can also carry [access bundles](/docs/claude-tag/admins/attach-to-scope#attach-a-bundle-to-channels-by-name), which attach in every matching channel Claude is in; a row with no bundles is marked **Auto-join only**, and Claude joins matching channels whether or not a row carries bundles. Editing the patterns needs an Admin or Owner of your Claude organization, and editing the bundles on a row needs an Owner.
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137Removing a pattern row also detaches the row's bundles. A row marked **Not auto-joined** shows a pattern that still has bundles attached but that the auto-join list no longer carries. Claude joins no new channels for it, but its bundles still attach in matching channels Claude is already in; remove the bundles from the row to end that.
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139A pattern is written in lowercase, like Slack channel names, plus two wildcards: `*` matches any run of characters and `?` matches exactly one. `inc-*` matches every channel whose name starts with `inc-`, and `*-confidential-*` matches any name containing `-confidential-`. The blocked list and the auto-join table each hold up to 50 patterns of up to 80 characters.
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137141A channel that matches a blocked pattern stays off-limits even when it also matches an auto-join pattern. Patterns on **Default Slack access** apply in every connected workspace. A workspace scope can add its own patterns but can't remove the organization's.
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