# GPU Acceleration Migration Checklist

## ✅ Pre-Migration Preparation

- [ ] Review existing CUDA-specific code
- [ ] Identify all files that import CUDA modules
- [ ] Document current CUDA usage patterns
- [ ] Create backup of existing code
- [ ] Test current functionality

## ✅ Code Migration

### Import Statements
- [ ] Replace `from high_performance_cuda_accelerator import ...` with `from gpu_acceleration import ...`
- [ ] Replace `from fastapi_cuda_zk_api import ...` with `from gpu_acceleration import ...`
- [ ] Update all CUDA-specific imports

### Function Calls
- [ ] Replace `accelerator.field_add_cuda()` with `gpu.field_add()`
- [ ] Replace `accelerator.field_mul_cuda()` with `gpu.field_mul()`
- [ ] Replace `accelerator.multi_scalar_mul_cuda()` with `gpu.multi_scalar_mul()`
- [ ] Update all CUDA-specific function calls

### Initialization
- [ ] Replace `HighPerformanceCUDAZKAccelerator()` with `GPUAccelerationManager()`
- [ ] Replace `ProductionCUDAZKAPI()` with `create_gpu_manager()`
- [ ] Add proper error handling for backend initialization

### Error Handling
- [ ] Add fallback handling for GPU failures
- [ ] Update error messages to be backend-agnostic
- [ ] Add backend information to error responses

## ✅ Testing

### Unit Tests
- [ ] Update unit tests to use new interface
- [ ] Test backend auto-detection
- [ ] Test fallback to CPU
- [ ] Test performance regression

### Integration Tests
- [ ] Test API endpoints with new backend
- [ ] Test multi-backend scenarios
- [ ] Test configuration options
- [ ] Test error handling

### Performance Tests
- [ ] Benchmark new vs old implementation
- [ ] Test performance with different backends
- [ ] Verify no significant performance regression
- [ ] Test memory usage

## ✅ Documentation

### Code Documentation
- [ ] Update docstrings to be backend-agnostic
- [ ] Add examples for new interface
- [ ] Document configuration options
- [ ] Update error handling documentation

### API Documentation
- [ ] Update API docs to reflect backend flexibility
- [ ] Add backend information endpoints
- [ ] Update performance monitoring docs
- [ ] Document migration process

### User Documentation
- [ ] Update user guides with new examples
- [ ] Document backend selection options
- [ ] Add troubleshooting guide
- [ ] Update installation instructions

## ✅ Deployment

### Configuration
- [ ] Update deployment scripts
- [ ] Add backend selection environment variables
- [ ] Update monitoring for new metrics
- [ ] Test deployment with different backends

### Monitoring
- [ ] Update monitoring to track backend usage
- [ ] Add alerts for backend failures
- [ ] Monitor performance metrics
- [ ] Track fallback usage

### Rollback Plan
- [ ] Document rollback procedure
- [ ] Test rollback process
- [ ] Prepare backup deployment
- [ ] Create rollback triggers

## ✅ Validation

### Functional Validation
- [ ] All existing functionality works
- [ ] New backend features work correctly
- [ ] Error handling works as expected
- [ ] Performance is acceptable

### Security Validation
- [ ] No new security vulnerabilities
- [ ] Backend isolation works correctly
- [ ] Input validation still works
- [ ] Error messages don't leak information

### Performance Validation
- [ ] Performance meets requirements
- [ ] Memory usage is acceptable
- [ ] Scalability is maintained
- [ ] Resource utilization is optimal