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Sweep 22 Oct 2026 · 04:32Z Build v2.1.308 527 read Stable v2.1.308 Latest v2.1.308 Next v2.1.308 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.300 ·

An MCP server list check can now be answered by a single on/off switch

A check that matched MCP servers against a remote list can now read a single on/off switch instead, depending on how it is called

Under the hood Internal Changes
JSON All of v2.1.300
Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
MCPArea: what it touches
Internal ChangesKind: in v2.1.300,
Internal ChangesSection of the release

Unclear What being on the list turns on for an MCP server is not stated.

What

MCP servers are outside programs that give Claude Code extra tools. Claude Code has a check that compares a server against a list supplied remotely. That check now takes an extra option. When the option is set, the check ignores the list and reads a single on/off switch, tengu_peppy_riddle. It reports the switch's value as whether the server is listed.

The switch is off unless it is turned on remotely. The flag server has returned on for this site's account and for an anonymous check. When the extra option is not set, the check still uses the list as before.

Why

A feature that was turned on server by server can now be turned on for all servers at once, or for none.

Read from
Feature flag
tengu_peppy_riddle Off by default, switched on for this account

The shipped code defaults this off, and the flag server returned on for the one account this site reads on this version. That is the reading that makes the entry above worth a second look, and it still says nothing about your account.

This account: on · anonymous baseline: on · compiled default in v2.1.300: off

These values were read against a different version of Claude Code, so treat them as the nearest reading available instead of one taken on this release.

tengu_tender_truffle Not enough to say

Nothing here resolved what this flag was doing on this version, so nothing here should be read as on or off.

This account: no value returned · anonymous baseline: no value returned · compiled default in v2.1.300: not a boolean we can read

These values were read against a different version of Claude Code, so treat them as the nearest reading available instead of one taken on this release.

Read once, for one account on one subscription tier, against v2.1.300. It isn't a statement about your account. What a flag value here can and cannot tell you

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 being on the list turns on for an MCP server is not stated.
The name it cites is new in this buildNew in this build: tengu_peppy_riddle

See this entry in the whole of v2.1.300 →

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