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Sweep 22 Oct 2026 · 21:04Z Build v2.1.309 528 read Stable v2.1.308 Latest v2.1.309 Next v2.1.309 Feeds RSS JSON llms.txt llms-full.txt Unofficial
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Claude Code v2.1.85 ·

Built-in MCP Server Toggle [Gradual Rollout]

Entry
JSON All of v2.1.85
EntryKind: in v2.1.85,
Bug FixesSection of the release
What

A mechanism to toggle built-in MCP servers on/off.

Status

Feature-flagged behind tengu_builtin_mcp_toggle.

Details
  • Tracks the server name and whether it's being enabled or disabled
  • Related to managing a disabledMcpServers list in application state
  • When enabled, users will be able to selectively disable built-in MCP servers
Evidence

MCP toggle tracking (gated by tengu_builtin_mcp_toggle, search for "disabledMcpServers")

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

See this entry in the whole of v2.1.85 →

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