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+---
+name: Refactor
+about: Propose an API change
+title: "[Refactor]"
+labels: ''
+assignees: ''
+
+---
+
+## Checklist  
+
+- [ ] I’ve verified this refactor maintains backward compatibility with all user-facing APIs.  
+- [ ] For large-scale refactors, I’ve prepared a phased implementation plan.  
+
+## Current Limitations  
+
+Describe existing design flaws or technical debt:  
+
+**Example:**  
+"`realhf/base/topology.py` currently only supports 3D parallelism for dense models, which limits extensibility for context parallelism or expert parallelism."  
+
+## Proposed Refactor  
+
+Explain the improvement and its benefits:  
+
+**Example:**  
+"Adopt Megatron-Core’s parallel state management instead of thecustom topology implementation. This would reduce maintenance overhead and improve support for emerging parallelism techniques"  
+
+## Alternatives Considered  
+
+Briefly summarize and compare other potential approaches (if applicable).  
+
+## Additional Context  
+
+Add references, screenshots, or related discussions.