- Adds a flake.nix with nixpkgs-unstable and flake-utils inputs
- Packages the llmfit TUI binary using rustPlatform.buildRustPackage
- Uses the checked-in Cargo.lock for reproducible builds
- Includes a devShell with the Rust toolchain
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>