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What
When running with the Linux sandbox enabled, Claude now starts a Unix-socket observer that monitors for filesystem violations (writes to paths that should be denied). Violations are reported in real time rather than only being caught after the fact.
Details
- Creates a temporary socket file under
/tmp/srt-obs-* - Receives structured violation events (syscall name, path, command) from the sandbox kernel module
- Applies
ignoreViolationsfilters (by path prefix and by command name) - The monitor socket path is passed to the sandbox so it can report outbound writes
- If the socket fails to start, violation monitoring is disabled but the sandbox itself continues running
Evidence
Linux sandbox monitor (search for "Started Linux seccomp violation monitor" and "[Sandbox Linux Monitor]")
Strings lifted out of the shipped bundle, so the claim above can be checked against them.