Show HN: RealDiff – runtime behavior diffing for pull requests (six languages)
Summary
RealDiff provides runtime behavior diffs for pull requests across six languages, comparing base and PR revisions to detect changes in behavior that static diffs miss. It learns a noise baseline from multiple runs and reports the first behavioral change within each call tree, including frontier analysis and findings. The project includes multi-language instrumentation, a cross-language CLI, demos, and GitHub/Azure integration for automated PR analysis.