tengu_immutable_falcon

A Claude Code feature flag, read out of the shipped bundle. It has been in the build since v2.1.321, including the newest one read.

Releases whose published page names tengu_immutable_falcon.

1. v2.1.321 9 Nov 2026
   Hooks get an extra processing step behind a remote switch

   Behind a remote switch, Claude Code adds a step that processes your hooks before checking them, and notes when hook_modules is used

   gate cited by this entry, found in this entry's text

Release	Resolved	This account	Anonymous	Compiled default
v2.1.321 read on another version	Not enough to say	no value returned	no value returned	off

Two arms, because they disagree: this account is the one account this site reads and anonymous is a baseline with no identity attached. A reading says nothing about your account, and off cannot rule out a rollout both readings sit outside of. What these readings can and cannot show.

The earliest release whose published evidence quoted tengu_immutable_falcon was v2.1.321, 9 Nov 2026. That is the oldest release this project wrote about it, so it is a floor on the name's age and not the release that introduced it. It is not a presence reading: which builds carried the name is the table below.

One row per release since the first build this name was read out of. Absent means the build was read and the name was not in it, never mined means no bundle for that release was ever archived, and a declared type or a default is only ever what that release's own bundle stated.

Read out of the published npm bundle release by release, and out of Anthropic's own documentation as this site captured it. Nothing on this page is a description anybody here wrote about what the feature flag does. All feature flags.