# 43-haskell-tree-rollouts This example shows rollout planning with `Data.Tree`. It includes: - one tree-shaped rollout plan with environments and services, - functions that render the tree and enumerate root-to-leaf deployment paths, and - a test suite run by `nix flake check`. Useful commands: ```bash nix develop cabal run cabal test nix build ./result/bin/mini-tree-rollouts nix run nix flake check ```