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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 v2.1.301 ·

SDK-provided MCP servers are left out of some permission rule handling

When Claude Code applies permission rules to MCP servers added while it runs, it now skips servers supplied through the Agent SDK

Under the hood Internal Changes
JSON All of v2.1.301
Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
SDKArea: what it touches
Internal ChangesKind: in v2.1.301,
Internal ChangesSection of the release

Unclear What skipping SDK-supplied servers here changes for a person using them is not clear.

What

MCP servers are add-ons that give Claude extra tools. Some are added while Claude Code is running. When Claude Code applies rules to those servers, it now skips any supplied by a program built on the Agent SDK, Anthropic's kit for running Claude Code from your own code.

Why

This changes which servers added while Claude Code runs have policy rules applied to them.

How sure we are
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubtWhat skipping SDK-supplied servers here changes for a person using them is not clear.

See this entry in the whole of v2.1.301 →

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