Unclear It is not clear which load errors count as recognised.
What
A session's transcript is the file where Claude Code saves a conversation so it can be resumed later. On Windows, reading it sometimes failed with an EBADF error even though the file opened normally, and resuming gave no reason why.
- Claude Code now recognises Windows errors with code EBADF from a read, including when the error is wrapped inside another error.
- When
--resumefails this way, by session ID or by.jsonlfile path, the old one-line error ("Unable to load transcript from file" or "Failed to resume session") now gets an explanation. It says "Windows reported an error (EBADF) when Claude Code read this session's transcript file, although the file had opened normally." It adds that security, encryption or endpoint-management software may be intercepting file reads, and suggests excluding the transcript or.claudefolder, or allowing Claude Code, in that software. - These failures are now logged as load errors rather than reported as crashes.
/resume <id>now shows a message starting "Failed to resume: " and logs the failure when a session fails to load with a recognised error. Before, it failed with no message.
Why
Windows users whose sessions would not resume now get a likely cause and a concrete fix, usually an exclusion in their security software.
Names in the bundle/resume
The entry above is what we published on the day. These lines were added later, as Anthropic's own pages caught up, and they sit beside the original rather than replacing it.
Added since
A small documentation edit on Manage sessions touched a line naming /resume after this was published.
Once you name a session through a CLI route or from claude.ai, return to it with `claude --resume <name>` or `/resume <name>`; a desktop-app session resumes in the [desktop app](/docs/en/desktop#work-in-parallel-with-sessions). See [Resume…sessions see the edit
Confirmed since
Anthropic's documentation has since written up /resume, on Continue local sessions from any device with Remote Control.
* **Some commands are local-only**: commands that only run in the terminal interface, such as `/plugin` or `/resume`, work only from the local CLI, whether or not you pass an argument. The following work from mobile and web:remote-control see the edit
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubt
It is not clear which load errors count as recognised.
Anthropic's documentation agrees
Anthropic's documentation has since written up /resume, on Continue local sessions from any device with Remote Control.