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 v2.1.238 Home All releases olderv2.1.237 v2.1.239newer
Claude Code v2.1.238

The tengu_ethereal_nova gate's built-in default is now on

Under the hood
Useful2 Signal4
Internals Notable

A feature switch that used to default off now defaults on when the server says nothing.

Feature flag
tengu_ethereal_nova 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 v2.1.238: off

Read once, for one account on one subscription tier, against v2.1.238. It isn't a statement about your account. What a flag value here can and cannot tell you

What

Separately visible in the bundle, the fallback value for this feature switch changed from false to true, so with no server-side answer it now resolves on for accounts that also pass the capability check it is combined with. The bundle only shows the fallback; the live value still comes from remote config.

Details
  • The check reads return rQ() && it("tengu_ethereal_nova", !0);, so the capability check in front of it still has to pass.
Evidence

return rQ() && it("tengu_ethereal_nova", !0);

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

See this entry in the whole of v2.1.238 →