Package addrs contains types that represent "addresses", which are references to specific objects within a Terraform configuration or state.

Package configs contains types that represent Terraform configurations and the different elements thereof.

Package experiments contains the models and logic for opt-in experiments that can be activated for a particular Terraform module.

Package getproviders is the lowest-level provider automatic installation functionality.

Package modsdir is an internal package containing the model types used to represent the manifest of modules in a local modules cache directory.

Package plans contains the types that are used to represent Terraform plans.

Package states contains the types that are used to represent Terraform states.

Package tfdiags is a utility package for representing errors and warnings in a manner that allows us to produce good messages for the user.

Package typeexpr is a fork of github.com/hashicorp/hcl/v2/ext/typeexpr which has additional experimental support for optional attributes.