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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 v2.1.227 ·

Two new remote feature flags: artifact auto-read guard and URL watching

Two new server flags control automatic artifact reading and subscribing to watched URLs.

Nothing to try yet Notable In Development
JSON All of v2.1.227
Nothing to try yetTier: how much it should matter to you
2Useful: my rating, 1 to 5
4Signal: worth watching, 1 to 5
ArtifactsArea: what it touches
In DevelopmentKind: in v2.1.227,
What probably matters to youSection of the release

One flag guards automatic artifact reads (on by default), the other gates URL watch subscriptions and is off.

What

Two server-controlled flags appeared. tengu_cobalt_plinth_moss (fallback on) gates the guard around automatically reading artifacts; with it off, the path logs artifact_guard_autoread with "gate_off" and does nothing. tengu_scalable_quiche (fallback off) gates subscribing to a watched URL or trigger; with it off, the subscribe call returns skipped with reason "flag_off" unless that item is already being watched.

Details
  • Neither flag name existed in 2.1.226; actual values come from remote config, so the fallbacks apply only when config is unavailable.
Evidence

tengu_scalable_quiche

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

Read from
Feature flag
tengu_cobalt_plinth_moss On for this account, and not off by default

The flag server returned on for the one account this site reads, and nothing in this release compiles it off by default. The compiled default is shown below, and says which it is when we cannot read one: a fifth of gates compile in a string or a number rather than on or off, and most published releases have no gate table behind them at all. No client can see what the server returns for your account.

This account: on · anonymous baseline: on · compiled default in v2.1.227: on

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_scalable_quiche 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 v2.1.227: 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 v2.1.227. 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_cobalt_plinth_moss, 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 nothing at all, having stopped carrying it for tengu_cobalt_plinth_moss, 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
One source agreesOne thing we can check says the same as this entry.
The name it cites is new in this buildNew in this build: tengu_cobalt_plinth_moss

See this entry in the whole of v2.1.227 →

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