- Provide a dev shell.
- Provide a nix package.
- Provide a nix flake.
- Development environment based on direnv.
- Docs.
- Configure Gitpod to use direnv and nix.
- Configure Cachix out of the box, and document how to use it.
- Add direnv and nix to CI.
- Satisfy some linters that came from Precommix, even when Precommix was later discarded.
- Mark some tests as impure.
- Run only pure tests when building Copier with Nix.
- Add poetry loader to direnv.
- Update contribution guide.
