What probably matters to youSection of the release
What
The attachments tool is one of the actions Claude can take, used for files you attach. A subagent is a helper Claude starts to work on part of a task. The tool's result is kept for use inside subagents only when the CLAUDE_CODE_ATTACHMENTS_BY_PATH environment variable is set. An environment variable is a named value you set in your shell before starting Claude Code. Before, a remote switch from Anthropic's servers could also turn this on.
The tool also now carries a short description of when to use it.
Why
If your account had the remote switch on, attachment results are no longer kept inside subagents unless you set CLAUDE_CODE_ATTACHMENTS_BY_PATH yourself.
Nothing here resolved what this flag was doing on this version, so nothing here should be read as on or off.
This account: no value returned · anonymous baseline: no value returned · compiled default in v2.1.323: not a boolean we can read
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.
