Penalized AFT Estimation via Coordinate Descent R package aftPenCDA version 0.1.0 Provides penalized accelerated failure time (AFT) model estimation for right-censored and partly interval-censored survival data using induced smoothing and coordinate descent algorithms. Supported penalties include broken adaptive ridge (BAR), LASSO, adaptive LASSO, and SCAD. Core estimation routines are implemented in 'C++' via 'Rcpp' and 'RcppArmadillo' for computational efficiency. The methodology is related to Zeng and Lin (2008) <doi:10.1093/biostatistics/kxm034>, Xu et al. (2010) <doi:10.1002/sim.2576>, Dai et al. (2018) <doi:10.1016/j.jmva.2018.08.007>, and Choi et al. (2025) <doi:10.48550/arXiv.2503.11268>. Software Imports: Rcpp, stats LinkingTo: Rcpp, RcppArmadillo Suggests: testthat (>= 3.0.0), knitr, rmarkdown Suyeon Seon <seonsy429@gmail.com> Comprehensive R Archive Network (CRAN) Suyeon Seon [aut, cre], Taehwa Choi [aut], Dipankar Bandyopadhyay [aut], Dongha Kim [aut], Seongoh Park [aut] GPL-3 2026-04-07 application/tgz https://CRAN.R-project.org/package=aftPenCDA doi:10.32614/CRAN.package.aftPenCDA