Description:`nf-diff` is a Nextflow plugin that compares two workflow runs by reconstructing them from local history and cache, generating a comprehensive HTML report showing differences across parameters, configuration, processes, performance, outputs, and more. It solves the problem of tracking what changed between runs without re-execution, making it valuable for workflow developers, CI/CD pipelines, and teams auditing pipeline changes. The plugin supports multiple output formats (HTML, JSON, Markdown) and integrates with GitHub Actions for automated PR comparisons.