Update CLAUDE.md development workflow

- Fix typo in 'commit'
- Add PR guidelines and common development tasks
- Update native code build command to use 'make clean-native native'

Author: xerial

CLAUDE.md

@@ -98,4 +98,19 @@ The project uses Docker-based cross-compilation toolchains (see `docker/` direct
 2. **Memory Safety**: Uses direct ByteBuffers for efficient memory operations - be aware of buffer boundaries
 3. **Thread Safety**: Snappy compression/decompression methods are thread-safe as they don't maintain state
 4. **OSGi Support**: The project includes OSGi bundle configuration in build.sbt
-5. **Compatibility**: Multiple stream formats are supported - ensure you use matching read/write formats (see compatibility matrix in README.md)
+5. **Compatibility**: Multiple stream formats are supported - ensure you use matching read/write formats (see compatibility matrix in README.md)
+
+## Development Workflow
+
+### Pull Request Guidelines
+- Use squashed commits when merging PRs to maintain clean commit history
+- Run tests before creating PR: `./sbt test`
+- Check code formatting: `./sbt scalafmtCheckAll`
+
+### Common Development Tasks
+- When making changes to native code, rebuild with `make clean-native native`
+- For Java/Scala changes, use `./sbt ~test` for continuous testing
+- Always test on multiple JDK versions if possible (8, 11, 17, 21)
+
+### Native Code Testing
+- Use make clean-native native for testing native code