checkpoint.hpp

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#pragma once
 
/**
 * Checkpoint — root abstract interface for all checkpoint I/O.
 *
 * Marker base for the checkpoint hierarchy. Each domain layer
 * (quantum_system, charge_density, wavefunction) extends this
 * with its own snapshot type and save/load signatures.
 */
 
namespace q3 {
 
class Checkpoint {
  public:
    virtual ~Checkpoint() = default;
};
 
} // namespace q3