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DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

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Claude Code v2.0.77 6 Jan 2026

Enterprise MCP Exclusive Mode

What

Enterprises can now configure MCP servers in exclusive mode, preventing users from adding custom MCP servers.

Usage: Configured via enterprise policy. When active, users see:

Cannot add MCP server: enterprise MCP configuration is active and has exclusive control over MCP servers

Details

Allows enterprises to lock down MCP server configuration
Users cannot add MCP servers via /mcp command or config files when active
Provides clear error messaging about why server addition is blocked

Evidence

jd() at line 398745 (MCP server add function, contains "enterprise MCP configuration is active and has exclusive control over MCP servers")

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

See this entry in the whole of v2.0.77 →