I Found Anthropic's Source Map in a Production...

On March 31, 2026, I was reviewing a Claude Code release when I found something unexpected: a complete JavaScript source map — a .js.map file — shipped inside the production bundle. Source maps are development artifacts. They contain the original, pre-minified source code, internal file paths, variable names, and architectural structure. In a production bundle, they're a blueprint of your codebase handed to anyone who looks. This wasn't an Anthropic-specific failure. Source map leakage is one of