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DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

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Claude Code v2.1.248

Attaching a session file under a directory-sync mount is gone

Under the hood
Useful1 Signal3
Directory Sync

The directory-sync client can no longer attach a session file to a mount path.

What

The directory-sync client no longer has the call that attached a session file to a mount path, along with its upload request and its guard against mount paths the server would reject. The capability is removed, not renamed.

Evidence

dir-sync: refused to attach a session file under a mount path or id the server would reject

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Related

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

See this entry in the whole of v2.1.248 →