Claude Code has a new internal module that checks whether a project directory's files are actually reachable and kept in sync by its cloud-session configuration. It walks symbolic links, checks whether paths are contained within the home directory, and checks for network shares, then classifies problems it finds as root_linked, inside_home, or unexamined (with reasons like too many entries, unreadable, or on a network share).
It also defines a fixed set of folder names, such as agent-memory, cache, projects, mcp-discovery-cache, plugins, and cowork_plugins, that are treated as Claude Code's own configuration tree for the purposes of this sync check.
This helps identify cases where a project's files won't actually be captured by cloud-session sync, for example because they're symlinked outside the expected location or live on a network share, so problems can be flagged rather than silently missing data.