docs: extension readme

extension/README.md

@@ -0,0 +1,34 @@
+## Pop Chain Extension
+
+_A Chain Extension for Polkadot SDK Runtimes_
+
+The pop-chain-extension crate introduces a versatile chain extension for seamless integration with any Polkadot SDK runtime. Unlike being confined to a single pallet, it offers a flexible, runtime-agnostic solution that adapts to any feature exposed by the runtime. Optimized for smart contracts, it enables backward-compatible dispatch of runtime calls and state queries, ensuring robust and future-proof functionality.
+
+### Key Features
+
+**Precise Weight Charging**: Handles accurate weight charging ensuring secure execution.
+
+**I/O handling**:
+
+_Motivation: versioning, enabling contracts to interact with different versions of the runtime, providing backward compatibility._
+
+- **Error Handling**: Supports flexible error processing returned by the runtime and send back to the smart contracts.
+
+- **Input Handling**: Supports flexible input processing for interacting with the runtime.
+
+**Rich Logging for Debugging**: Provides detailed logging capabilities with customizable log targets, aiding developers in debugging and monitoring contract interactions with the runtime.
+
+### Learn more
+
+The Pop Chain Extension is integrated into Pop's runtime, serving as the foundation for the [Pop API ink! library](../pop-api).
+
+Check out how the extension is [configured in the Testnet runtime](../runtime/devnet/src/config/api) and find out how the api modules come into play as well!
+
+### Support
+
+Be part of our passionate community of Web3 builders. [Join our Telegram](https://t.me/onpopio)!
+
+Feel free to raise issues if anything is unclear, if you have ideas or want to contribute to Pop!
+
+For any questions related to ink! you can also go to [Polkadot Stack Exchange](https://polkadot.stackexchange.com/) or
+ask the [ink! community](https://t.me/inkathon/).

pop-api/README.md

@@ -46,13 +46,7 @@ Check out the ink! smart contract [examples](./example) using the API.
 ### Learn more
 
 The true strength of the API lies in the Pop runtime, where a single, unified chain extension provides flexible and
-efficient access to all runtime features, while specialized API modules deliver stable, intuitive interfaces for
-developers. Together, these elements make the API a powerful tool for creating decentralized applications on Polkadot.
-
-Want to explore how it all works? Check out:
-
-- [Chain Extension Implementation](../extension)
-- [API Modules](../pallets/api)
+efficient access to all runtime features. Go check out the [extension](../extension) if you want to learn more!
 
 ### Support