Anthropic's Claude Code Reverse-Engineered: A New Era in Software Security

A security researcher cleverly leveraged LLMs Grok and Claude to reverse-engineer Anthropic's Claude Code, a terminal-based AI coding agent. Exploiting the LLMs' powerful code translation capabilities, they deconstructed Claude Code's 5MB `cli.mjs` file into smaller chunks, reverse-engineering each piece to reconstruct the tool's source code structure. This breakthrough highlights the new challenges and opportunities LLMs present in software security, foreshadowing a dramatic shift in future software development. The ease with which source-available software can now be replicated poses significant risks to software security and business models.