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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 ·

A new switched-off check for one tool in the arbiter permission mode

A new check covers one specific tool in a permission mode named arbiter and stays off unless the server turns it on

Nothing to try yet In Development
JSON All of v2.1.300
Nothing to try yetTier: how much it should matter to you
3Useful: my rating, 1 to 5
5Signal: worth watching, 1 to 5
PermissionsArea: what it touches
In DevelopmentKind: in v2.1.300,
What probably matters to youSection of the release

Unclear What this check turns on or changes when it applies is not clear.

What

A new check looks at the tool name and whether the session's permission mode is the one named "arbiter". A second check matches it against one specific tool. Both sit behind the tengu_jaunty_umbrella server-side switch, which falls back to off when the server sends nothing.

The flag server returned off for this site's account and for the anonymous baseline. No reading has been taken under this release yet.

Why

In practice this is a feature that is off by default, in the part of Claude Code that decides whether a tool may run.

Read from
Feature flag
tengu_jaunty_umbrella Off in both readings

The flag server returned off for the account this site reads and for the anonymous baseline. A reading of off cannot rule out a rollout these two readings sit outside of.

This account: off · anonymous baseline: off · 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.

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

What has happened since
Flag reading moved The flag server now returns on for tengu_jaunty_umbrella, read as this account. A reading is one sample. Claude Code evaluates its flags remotely, so no client sees the targeting rule behind a value and this says nothing about your account.
Flag reading moved The flag server now returns off for tengu_jaunty_umbrella, read as this account. A reading is one sample. Claude Code evaluates its flags remotely, so no client sees the targeting rule behind a value and this says nothing about your account.
Flag reading moved The flag server now returns on for tengu_jaunty_umbrella, read as this account. A reading is one sample. Claude Code evaluates its flags remotely, so no client sees the targeting rule behind a value and this says nothing about your account.
Flag reading moved The flag server now returns off for tengu_jaunty_umbrella, read as this account. A reading is one sample. Claude Code evaluates its flags remotely, so no client sees the targeting rule behind a value and this says nothing about your account.
Flag reading moved The flag server now returns on for tengu_jaunty_umbrella, read as this account. A reading is one sample. Claude Code evaluates its flags remotely, so no client sees the targeting rule behind a value and this says nothing about your account.
Flag reading moved The flag server now returns off for tengu_jaunty_umbrella, read as this account. A reading is one sample. Claude Code evaluates its flags remotely, so no client sees the targeting rule behind a value and this says nothing about your account.
Flag reading moved The flag server now returns on for tengu_jaunty_umbrella, read as this account. A reading is one sample. Claude Code evaluates its flags remotely, so no client sees the targeting rule behind a value and this says nothing about your account.
Flag reading moved The flag server now returns off for tengu_jaunty_umbrella, read as this account. A reading is one sample. Claude Code evaluates its flags remotely, so no client sees the targeting rule behind a value and this says nothing about your account.

See this across every release →

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 this check turns on or changes when it applies is not clear.
The name it cites is new in this buildNew in this build: tengu_jaunty_umbrella

See this entry in the whole of v2.1.300 →

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