What problem does it solve? Before writing new tests, developers need to know which source files have no test coverage, but running coverage tools requires a green build and a full test run that can take many minutes. This Skill answers that question statically in seconds by parsing source and test files to build a source-to-test pairing map, with no build, no dependency resolution, and no compilation. ## Core Features & Use Cases - Dual analysis engines: A Roslyn-based C# analyzer with strict namespace disambiguation for .NET-only repos, and a tree-sitter polyglot analyzer supporting Python, TypeScript/JavaScript, Go, Java, Rust, Ruby, and C#. - Prioritized JSON worklist: Emits untested files ordered by declaration count (API surface), each with a suggested_test_path derived from existing project references, plus source-to-test pairing maps and orphan test detection. - Use Case: An agent preparing to generate tests runs the analyzer on a large repository, receives a ranked list of untested files with suggested test paths, and picks the highest-API-surface file to test first without reading the entire codebase. ## Quick Start Run the find-untested-sources analyzer on this repository and show me the top untested source files with their suggested test paths.
