reportgenerator

Run ReportGenerator with -reports pointing to your coverage.cobertura.xml files, -targetdir for the output folder, and -reporttypes set to HtmlSummary or Html. As a local tool, invoke it with dotnet tool run reportgenerator.

Pass a glob pattern or semicolon-separated list to -reports, such as "**/coverage.*.xml", and set -reporttypes to Cobertura. ReportGenerator merges all matching inputs into a single consolidated output file.

ReportGenerator supports HTML variants, Markdown summaries including GitHub-flavored, machine-readable formats like Cobertura, OpenCover, lcov, and SonarQube, plus SVG badges, JSON, CSV, and plain text summaries.

Prefer a local tool manifest for reproducible CI runs: create it with dotnet new tool-manifest, then install dotnet-reportgenerator-globaltool. Global installation works for ad-hoc local use but is less reproducible across agents.

Skip it when raw coverage files already satisfy your needs and no human-readable or merged output is required. It renders reports from existing coverage data; it does not collect coverage itself.

Generate the MarkdownSummaryGithub format, then append the produced SummaryGithub.md file to $GITHUB_STEP_SUMMARY in your workflow step. Add Badges to the report types if you also want README coverage badges.