dsh-code-impact

In TypeScript and JavaScript projects, tracing a single Git change through the module graph to find affected declarations, files, and tests is slow and error-prone when done by hand. dsh-code-impact performs this analysis in a strictly read-only manner within the DeepSeek Harness: it compares HEAD against the working tree (or any two refs), builds a temporary reverse module dependency graph, and returns changed declarations, impacted files, edge-by-edge propagation paths, file-line evidence, and ranked test candidates. Version 0.2 understands JSONC configs, tsconfig extends, project references, path aliases, and package exports/imports, reusing unchanged snapshots within a single call without maintaining any persistent index, running tests, or writing files.

It suits teams that need a fast impact assessment of TS/JS changes in CI pipelines or local pre-commit hooks, as well as scenarios where a model-reasoning agent needs structured impact context without pulling in a heavyweight static-analysis stack. All results carry explicit truncation markers and warnings; exceeding repository-scale limits returns a clear error code rather than a fabricated partial report.