A source code leak from Anthropic's Claude Code 2.1.88 update exposed over 512,000 lines of TypeScript code, revealing planned features and AI instructions.

The leak occurred after Anthropic released Claude Code version 2.1.88, which accidentally included a package with a source map file containing the full TypeScript codebase

Over 512,000 lines of code were exposed, with users discovering the leak on X and sharing the source files publicly

Leaked data reportedly includes upcoming features, Anthropic's internal instructions for the AI bot, and details about its 'memory' architecture

The incident was covered by major tech outlets including Ars Technica and VentureBeat