depguard - Manifest-Based Dependency Conflict Detection for Sandboxed and Desktop R Sessions

Lightweight, offline-first checking of R package dependencies against the currently installed environment, without requiring a full project lockfile. Verifies a declared manifest of package versions, including version constraints declared by transitive dependencies, reports session-level snapshot differences (including stale versions still loaded in a running session), detects packages shadowed by another library, and offers single-package version rollback. Designed for hosted notebooks (e.g. Kaggle, Colab, Binder) where 'renv'-style lockfile ownership is impractical, and equally usable on a normal desktop.