# 36-haskell-map-set-modeling

This example shows intermediate Haskell domain modeling with `Map` and `Set`.

It includes:

- a release-access policy stored in maps and sets,
- team membership, service ownership, and environment grants,
- a CLI that reports required owners and unexpected approvers, and
- a test suite run by `nix flake check`.

Useful commands:

```bash
nix develop
cabal run
cabal run -- api:production:platform,security
cabal test

nix build
./result/bin/mini-access-policy api:production:platform,security

nix run . -- api:production:platform,security
nix flake check
```