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StrixDockerSandboxClient.delete() best-effort-kills the sandbox container via containers.get(id).kill() before delegating to the SDK's delete(), suppressing docker NotFound/APIError. But when the docker daemon socket is already going away — the normal case on a host/CI teardown — containers.get() -> inspect_container raises requests' ConnectionError, which is a *sibling* of docker.errors.APIError under requests.RequestException, not a subclass. So it escapes the APIError-only suppress and surfaces a full traceback on teardown even though the kill is meant to be best-effort. Add RequestException to the suppress so the best-effort kill is genuinely best-effort regardless of daemon reachability. Test: tests/test_docker_client_delete.py — the kill raising ConnectionError (and NotFound/APIError) is swallowed and delete() still delegates; unrelated errors still propagate; no-container_id is a no-op. The ConnectionError case fails against the pre-fix APIError-only suppress. Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>