Transparent and Assisted Linear Modeling Engine R package OLSengine version 1.1.1 Unified estimation, diagnostics, and reporting for ordinary least squares (OLS) regression, ANOVA/t-tests, logistic regression, panel data (fixed/random effects with Hausman test), instrumental variables (2SLS with weak instrument diagnostics), and difference-in-differences. Designed for applied researchers in social sciences with integrated "Methodological Customs" that audit assumptions and provide literature references. All methods implemented in pure base R without external dependencies beyond stats and graphics packages. Software Depends: R (>= 3.5.0) Imports: stats, graphics Suggests: knitr, rmarkdown Manuel Soto-Pérez <msoto@up.edu.mx> Comprehensive R Archive Network (CRAN) Manuel Soto-Pérez [aut, cre] (ORCID: <https://orcid.org/0000-0002-2298-2047>) MIT + file LICENSE (https://CRAN.R-project.org/package=OLSengine/LICENSE) 2026-07-31 application/tgz https://CRAN.R-project.org/package=OLSengine doi:10.32614/CRAN.package.OLSengine