Show HN: Shannon's Revenge – detect Claude in your codebase for DoD compliance (github.com)

On February 27, 2026, the Department of War identified Anthropic as a supply chain risk, necessitating that defense contractors certify they have no commercial dealings with the AI firm. In response, developers have created "Shannon's Revenge," a GitHub scanning tool designed to aid compliance by detecting code influenced by Anthropic's AI model, Claude. Named after Claude Shannon, the father of information theory, the tool inspects commit metadata to find 'Claude signatures' through various detection methods, such as co-authored commits, Claude Code markers, and specific keyword patterns. This initiative is significant for the AI and machine learning community as it highlights the growing need for transparency and accountability in AI deployments, especially within government and defense sectors. The tool operates under GitHub API rate limits and offers several scanning options, including organization-wide scans and custom detection patterns via JSON configuration files. While the tool is capable of flagging direct Claude involvement in code, it cannot guarantee complete detection of all indirect uses, illustrating the complexities of tracking AI influence in software development.