During December 2024, Roman Adt addressed a critical configuration issue in the graphprotocol/graph-tooling repository by implementing a fix for the Substreams graft type manifest. He enhanced the manifest.graphql schema by adding a graft type with base and block fields, resolving the absence of graft type support in substreams manifests and enabling correct graft configurations for subgraph deployment. This work, utilizing GraphQL schema definition and Substreams, improved deployment reliability and maintainability. Roman’s contribution focused on precise schema updates and traceable commit documentation, reflecting a targeted engineering effort to resolve a specific bug rather than broad feature development during this period.