feat: update Rust-Python integration guidelines for consistency in class implementations

Author: kosiew

AGENTS.md

@@ -47,11 +47,16 @@ When generating Rust code for DataFusion, follow these guidelines:
 
 3. Follow the standard Rust style conventions from rustfmt
 
-## Rust-backed Classes
+## Rust-Python Integration
 
-Some Python classes in this project are thin wrappers around Rust
-implementations. If a change affects such a class, update the Rust code
-first and then adjust the Python wrappers accordingly.
+**Important:** Some classes in this repository have their core implementations in Rust with Python bindings. For any changes related to these classes in Python:
+
+1. **Always update the Rust implementation first** before making corresponding changes to the Python bindings
+2. Ensure the Rust changes are properly tested in Rust before updating Python code
+3. Update Python bindings to reflect the new Rust API
+4. Add or update Python tests to cover the new functionality
+
+This ensures consistency between the Rust core and Python interface, and prevents binding mismatches.
 
 ## Code Organization
 - Keep functions focused and under about 50 lines.

GEMINI.md

@@ -33,7 +33,7 @@ The repository is organized as follows:
 
 ## Important Development Note
 
-Some classes in this repository have their core implementations in Rust.
+Some Python classes in this repository have their core implementations in Rust.
 For any changes related to these classes in Python, ensure the corresponding updates are first made in the Rust implementation.
 
 ## How to Build and Test