Sem semantic engine cuts monorepo graph times, outperforms git diff for AI agents

Sem is an open-source semantic code engine that builds detailed entity graphs to power intelligent diffs, dependency analysis, and codebase context. Recent updates dramatically improved performance for massive monorepos—cutting cold graph build times from impractical durations to roughly 7.5 minutes for 71,000 files—while a benchmark showed sem diff achieves 95.9% accuracy versus 41.5% for git diff when used with AI agents. The tool now also integrates cargo-semver-checks into its CI pipeline and offers a Homebrew install option.