What
When a connected Slack MCP server is detected, Claude Code now offers channel autocomplete with #channel-name syntax.
Details
- Automatically discovers connected Slack MCP servers
- Searches for channels using the Slack MCP tool (supports public and private channels)
- Parses channel names from MCP tool responses and provides autocomplete suggestions
- Channel references use the
#channel-nameformat in the input
Evidence
Slack channel integration (search for "Failed to fetch Slack channels") — AQK() at line ~592144
Strings lifted out of the shipped bundle, so the claim above can be checked against them.