You'll notice
Useful2 Signal2
In a proxied sandbox Claude is told to try requests and read errors rather than guess reachability.
What's wrong with this entry?
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What
When a sandbox is configured with an egress proxy, the model is now told to just attempt a request and read the error rather than guess what is reachable, and pointed at the sandbox violations block for details.
Details
- Only added when the proxy configuration is present and non-empty; sandboxes without one see the previous preamble.
Evidence
Network egress goes through a filtering proxy.
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.
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v2.1.236
macOS sandbox re-applies read and delete denials inside writable folders
Both mention sandbox
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v2.1.236
Sandbox proxy no longer writes to sockets that have gone away
Both mention sandbox
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v2.1.236
IPv6 hosts through the proxy
Both mention sandbox