Tabspaces is an Emacs Lisp package that creates buffer-isolated workspaces using Emacs' built-in tab-bar and project.el packages. It allows users to maintain separate buffer lists for each tab, effectively creating isolated workspaces that integrate with version-controlled projects. The package provides session saving/restoring capabilities, echo area display options, and integrates with popular Emacs buffer management frameworks like consult, ivy, and ibuffer. While the GitHub repository is marked as a read-only archived mirror (with development moved to Codeberg), the code demonstrates strong Emacs Lisp craftsmanship, particularly in its sophisticated session management system with extensible buffer kind registration and robust workspace isolation mechanisms.