Why Null Review if OCR exists?
Choose by the workflow your team needs to operate.
OCR is a capable review tool
Alibaba Open Code Review provides CLI/agent workflows, rule matching, file search and model-provider integration. If your team needs that workflow and can maintain the surrounding system, evaluate OCR directly.
Null organizes the surrounding workflow
Shared context
A pinned ContextPack instead of reconstructing the request.
Tenant ownership
Roles, service databases and repository scopes.
Decision history
Review, recheck, CI and controlled actions in one trail.
The intended benefit is less integration work for teams that need these controls. This is a product-scope comparison, not evidence that OCR cannot be extended or that Null has better model quality. Validate the benefit in a pilot.
Sources and validation
Alibaba Open Code Review: README and source · Open Code Review