Claude Code v2.1.290 ·
Temporary files for fetched session history are now checked for tampering
Fetched session history is now saved in a private temporary folder and checked for changes before it is read
You'll noticeTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
SessionsArea: what it touches
ImprovementsKind: in v2.1.290,
ImprovementsSection of the release
What
When Claude Code fetches the history of a remote session, it saves it in temporary files before reading it back. Those files now get more protection:
- They go in a private temporary folder whose name starts with
cc-history-prefetch-.
- Each file is created fresh, and creation fails if the file already exists.
- A fingerprint of the content is taken while writing and checked again when reading.
If the fingerprint does not match, Claude Code skips that file. Before, it read the file without any check.
Why
Another program on the same machine can no longer quietly change these files between writing and reading.
See this entry in the whole of v2.1.290 →
