devenv 2.0: A Fresh Interface to Nix
Summary
devenv 2.0 brings a fully interactive Nix developer experience with live terminal UI, background shell reloading, a native Rust process manager, and incremental evaluation caching, enabling faster feedback and more reliable dev loops. It also introduces polyrepo/out-of-tree workflows, automatic port allocation, SecretSpec-based secrets management, and an MCP server for tooling access.