claude: srt: sandbox runtime

The blog post introduces 'srt', Anthropic's open-source sandbox runtime that adds network isolation to the existing filesystem isolation provided by 'cco'. The post outlines how to use 'srt' for secure command execution, detailing its configuration options and contrasting it with 'cco'. With features like auto-allow modes and strict permissions, 'srt' aims to enhance security for developers while simplifying the command execution process.