Comment by tstrimple

This does sound sus. I have CC update other project's claude.md files all the time. I've got a game engine that I'm tinkering with. The engine and each of the game concepts I play around with have their own claude.md. The purpose of writing the games is to enhance the engine, so the games have to be familiar with the engine and often engine features come from the game CC rather than the engine CC. To keep the engine CC from becoming "lost" about features implemented each game project has instructions to update the engine's claude.md when adding / updating features. The engine CC bootstraps new game projects with a claude.md file instructing it how to keep the engine in sync with game changes as well as details of what that particular game is designed to test or implement within the engine. All sorts of projects writing to other project's claude.md files.