When publishing a brand-new artifact (one with no existing slug or create path yet), Claude Code can now call a new step that reserves the artifact's address ahead of time, before the actual publish request is sent. This only happens under specific conditions: no slug or create path already exists, and multi-file artifacts are enabled while another related condition is not.
Reserving the address in advance helps ensure the artifact's final location is settled before publishing begins, reducing the chance of conflicts during publish.
tengu_cobalt_plinth_bracken Off by default, switched on for this accountThe 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 v2.1.273: 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 v2.1.273. It isn't a statement about your account. What a flag value here can and cannot tell you