Tamper-Evident Audit Logging for Regulated Environments R package regulog version 0.2.1 Provides tamper-evident, hash-chained audit logging for analytical applications. Every log entry is linked via an 'SHA-256' hash to its predecessor, making insertions, deletions, and modifications detectable. Covers user attribution, timestamp integrity, mandatory reason capture, chain verification, structured export, and 'shiny' session instrumentation. For more details see <https://reprostats.org/regulog/>. Suitable for any context where accountability and traceability matter: regulated environments (21 CFR Part 11, EU Annex 11), internal tooling, data pipelines, and multi-user 'shiny' applications. Ships with optional qualification scripts (IQ, OQ, PQ) for use in validated computerised systems. Software Imports: digest, jsonlite, utils Suggests: covr, dplyr, ggplot2, haven, knitr, readr, rmarkdown, shiny, testthat (>= 3.0.0), tidyr, withr Ndoh Penn <ndohpenn9@gmail.com> Comprehensive R Archive Network (CRAN) Ndoh Penn [aut, cre] (ORCID: <https://orcid.org/0009-0003-9054-465X>) MIT + file LICENSE (https://CRAN.R-project.org/package=regulog/LICENSE) 2026-07-16 application/tgz https://CRAN.R-project.org/package=regulog doi:10.32614/CRAN.package.regulog en-GB