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Refactoring a shared service with an incomplete dependency tree breaks callers the refactor missed. In a large codebase, the actual scope of a “small” change rarely surfaces from the service itself. Ask maps every dependent across the knowledge graph using the Node Neighbors tool, organized by dependency type, so the full impact surfaces before touching a single line. Question: 
What depends on UserService?
Ask returns:
  • Every class, function, and module that imports or calls UserService
  • Every call site with its exact file path and line number, organized by dependency type
  • Transitive dependencies that could be affected by interface changes
Ask maps the full blast radius before the refactor begins. Build uses the same dependency map to generate a spec and diff scoped to every affected file.