Source Intelligence

DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

All of v2.1.227 Home All releases olderv2.1.226 v2.1.228newer
Claude Code v2.1.227

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

Not switched on
Useful2 Signal4
Artifacts Notable

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

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

Feature flag
tengu_cobalt_plinth_moss 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 v2.1.227: 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.

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: 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.

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

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.

See this entry in the whole of v2.1.227 →