A semantic map for C# repositories
An open-source developer has released Graphify C#, a headless indexing tool designed to give coding agents compiler-resolved information about C# programs. The project uses Microsoft's Roslyn compiler platform and MSBuild to analyze source and emit a deterministic JSON graph containing declarations and relationships between them.
The tool targets a recurring weakness in agent-assisted programming: plain-text search can locate matching names, but it cannot reliably determine which overloaded method a call resolves to, whether a symbol belongs to a particular project or which concrete class implements an interface. Graphify C# asks Roslyn to resolve those relationships and records calls, references, implementations, inheritance and overrides as directed edges.
Its repository says the indexer accepts Visual Studio solution files, C# project files and SDK-style file-based applications. The relevant SDKs, NuGet packages and MSBuild inputs must be available on the machine doing the analysis. It does not require compiled project DLLs, a database or an IDE. The project is distributed under the MIT license.
JSON output and explicit limits
Graphify C# produces a single JSON document with nodes, edges and hyperedges. Developers can inspect that output directly, query it with command-line tools such as jq, process it from another program or pass it to the separate Graphify graph-analysis application. Source locations and provenance remain attached to graph data so an agent can trace evidence back to code.
The project also includes a skill file that explains to compatible coding agents when to refresh the index and how to follow semantic edges. A watcher mode keeps a Roslyn workspace warm and prepares changed projects in the background, while a normal invocation serves as a refresh barrier and returns after a complete snapshot is current. A rebuild option invalidates the incremental cache.
The author stresses that the graph represents static compiler evidence, not a complete account of runtime behavior. Reflection, dependency injection, dynamic dispatch, native callbacks and code outside the loaded compilation can create relationships that will not appear as direct edges. Consequently, a method with no inbound edge is not automatically safe to delete. Unsupported semantic patterns are reported as diagnostics instead of being silently omitted.
Graphify C# occupies a narrower role than a full IDE or broad dependency-analysis product. It focuses on exporting the semantic-navigation layer in a format agents and other automation can consume. Its value will depend on how accurately it handles real repositories and evolving C# syntax, but the release gives developers a new open-source option for grounding agent decisions in compiler analysis rather than spelling matches.
