Update README.md

crates/sdk/README.md

@@ -5,3 +5,20 @@ The Software Development Kit (SDK) for building zero-knowledge applications with
 ## Overview
 
 The SP1 SDK provides a high-level interface for developers to write zero-knowledge programs in Rust. It abstracts away the complexity of zero-knowledge proof systems while providing full access to Rust's standard library and ecosystem.
+
+## Features
+
+- Write ZK programs in standard Rust
+- Full `std` library support
+- Easy-to-use macros and annotations
+- Seamless integration with most Rust crates
+- Built-in precompiles for common operations
+
+## Usage
+
+Add the SDK to your project's `Cargo.toml`:
+
+```toml
+[dependencies]
+sp1-sdk = { git = "https://github.com/succinctlabs/sp1.git" }
+```