opentofu/docs/README.md
Martin Atkins e1af10b554 docs: README for the plugin-protocol directory
This is an initial partial description of the plugin protocol focused
mainly on explaining the purpose of the .proto files. In subsequent
updates we will also document the negotiation protocol, etc.

For this first pass the goal was just to publish some information that was
already available in an internal design document so that it's visible to
SDK implementers. It is focused on the .proto versioning strategy because
that was the main topic of the internal design documentation this was
based on.
2019-06-11 14:29:35 -07:00

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# Terraform Core Codebase Documentation
This directory contains some documentation about the Terraform Core codebase,
aimed at readers who are interested in making code contributions.
If you're looking for information on _using_ Terraform, please instead refer
to [the main Terraform CLI documentation](https://www.terraform.io/docs/cli-index.html).
## Terraform Core Architecture Documents
* [Terraform Core Architecture Summary](./architecture.md): an overview of the
main components of Terraform Core and how they interact. This is the best
starting point if you are diving in to this codebase for the first time.
* [Resource Instance Change Lifecycle](./resource-instance-change-lifecycle.md):
a description of the steps in validating, planning, and applying a change
to a resource instance, from the perspective of the provider plugin RPC
operations. This may be useful for understanding the various expectations
Terraform enforces about provider behavior, either if you intend to make
changes to those behaviors or if you are implementing a new Terraform plugin
SDK and so wish to conform to them.
(If you are planning to write a new provider using the _official_ SDK then
please refer to [the Extend documentation](https://www.terraform.io/docs/extend/index.html)
instead; it presents similar information from the perspective of the SDK
API, rather than the plugin wire protocol.)
* [Plugin Protocol](./plugin-protocol/): gRPC/protobuf definitions for the
plugin wire protocol and information about its versioning strategy.
This documentation is for SDK developers, and is not necessary reading for
those implementing a provider using the official SDK.
## Contribution Guides
* [Maintainer Etiquette](./maintainer-etiquette.md): guidelines and expectations
for those who serve as Pull Request reviewers, issue triagers, etc.