Why Copying .codex Isn't Enough: Building a Cross-Platform Codex Session Migrator (opens in new tab)

When I moved Codex work between computers, I expected the migration process to be simple: copy the old .codex directory to the new machine and reopen Codex. The files were there, but the result was not what I expected. Historical projects did not reliably appear, sessions could be missing from the interface, and paths stored on macOS made no sense on Windows. That problem led me to build Codex Migrate, an open-source Rust desktop application and CLI for migrating, repairing, backing up, and e...