fix: update README.md

README.md

@@ -1,54 +1,4 @@
 # Lattice SDK C++
 
-[![Version](https://img.shields.io/github/v/release/anduril/lattice-sdk-cpp)](https://github.com/anduril/lattice-sdk-cpp/releases)
-
-The official [Anduril](https://www.anduril.com/) Lattice SDK for C++.
-
-## Documentation
-
-See the documentation for [Lattice C++ SDK](https://docs.anduril.com/guide/sdks/cpp).
-
-## Requirements
-
-> [!WARNING]  
-> It's very important that the versions of libprotobuf match the version that it was compiled with as C++ requires very specific [guarantees](https://protobuf.dev/support/cross-version-runtime-guarantee/#cpp).
-> 
-The current requirements are:
-* `gRPC == 1.68.0`
-* `Protobuf == 29.0.0`
-* `CMake >= 3.16`
-
-As an alternative, we also provide the underlying Protobuf files in the `protos` directory if you wish to compile these yourselves with specific versions of Protobuf/gRPC.
-
-Alternatively, use specific versions of Protobuf or gRPC by compiling the Protobuf files in the [`protos` directory](https://github.com/anduril/lattice-sdk-cpp/tree/master/protos).
-
-## Installation
-
-The only supported way of install the C++ SDK is by fetching the package using CMake. Please use a fixed version of `GIT_TAG` to ensure that
-you are not impacted by dependency updates of `gRPC` or `Protobuf`. The latest version is available [here](https://github.com/anduril/lattice-sdk-cpp/releases/latest).
-
-### CMakeLists.txt
-
-```cmake
-cmake_minimum_required(VERSION 3.14.0)
-project(lattice-sdk-example)
-
-# Download the SDK from github and add it as part of the project
-include(FetchContent)
-FetchContent_Declare(
-  lattice-sdk-cpp
-  GIT_REPOSITORY https://github.com/anduril/lattice-sdk-cpp.git
-  GIT_TAG v1.0.0
-)
-FetchContent_MakeAvailable(lattice-sdk-cpp)
-
-# Other build instructions
-....
-
-# Link SDK with your sample application.
-target_link_libraries(sample_app lattice-sdk-cpp)
-``` 
-
-## Support
-
-For support with this library please reach out to your Anduril representative. 
+> [!IMPORTANT] 
+> As of 07/24/2025, this repository has been archived and will no longer receive any updates. The Protobuf files used to generate the files here are now available via the [Buf Schema Registry](https://buf.build/anduril/lattice-sdk). The specific plugin used to generate this repository is [grpc/cpp@1.68.0](https://buf.build/anduril/lattice-sdk/sdks/main:grpc/cpp?version=v1.68.0). For any additional support please reach out to your Anduril representative.