Run Chromium and Rootless Podman in Claude Code’s Linux Sandbox

Claude Code 2.1.305 adds sandbox.allowNestedUserNamespaces for Linux and WSL2, enabling tools such as headless Chromium and rootless Podman to run inside the Bash sandbox. Learn how to enable it and why it weakens the sandbox’s file protections. The hosts also cover fixes and quality-of-life updates in 2.1.304–2.1.306, including gateway retries, /usage fixes, and retry-watchdog configuration.