Sweep 19 Sep 2026 · 02:36Z Build v2.1.278 500 read Stable v2.1.267 Latest v2.1.278 Next v2.1.278 Feeds RSS JSON llms.txt Unofficial
Claude Code v2.1.271 ·

New MCP exclusive-lock message for managed servers

New warning message explains when a lock file restricts Claude Code to only organization-managed MCP servers

TierYou'll noticehow much it should matter to you
Useful1my rating, 1 to 5
Signal1worth watching, 1 to 5
AreaMCPwhat it touches
KindImprovementsin v2.1.271,
You'll notice

New warning message explains when a lock file restricts Claude Code to only organization-managed MCP servers

What

Claude Code now has user-facing text explaining that a special lock file can restrict which MCP (Model Context Protocol) servers are allowed to load, limiting things to only the organization's managed servers until the lock file is fixed or removed and Claude Code is restarted.

Why

This makes it clear to users why non-managed MCP servers suddenly stop loading, and tells them what to do about it: fix or remove the lock file and restart.

See this entry in the whole of v2.1.271 →