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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

Background-session start errors can be withheld

You'll notice
Useful1 Signal1
Sessions

Failing to fork work into the background may show a fixed message instead of the real error.

What

When the confirm dialog for forking work into the background fails to start the session, some connections now show a fixed message instead of the underlying error text.

Details
  • The message is "Couldn't start the background session (detail withheld on this connection)."
  • Which connections redact is decided by a check on the connection type; the helper behind that check is not resolved in this build.
Evidence

Couldn't start the background session (detail withheld on this connection).

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

See this entry in the whole of v2.1.248 →