What
When Claude saves a batch of documents to a directory you approved, it now rechecks before every individual write that the directory still resolves to the same place, instead of only checking after the whole batch. If it moved, the save aborts and nothing is written.
Details
- The target directory is opened once through a locked handle and revalidated before each document write.
- On mismatch the tool fails with an error telling the model to retry so the directory is checked again; the message reported is "out_dir no longer resolves where it did when the save was approved - nothing was saved; retry so it is checked again."
- Applies unconditionally to this save path.
Evidence
out_dir no longer resolves where it did when the save was approved \u2014 nothing was saved; retry so it is checked again.
Strings lifted out of the shipped bundle, so the claim above can be checked against them.