NEWS.md

In clarabel: Interior Point Conic Optimization Solver

clarabel 0.11.3

• clarabel_control() defaults now match Clarabel.rs exactly. Several had fallen behind upstream:
• Chordal decomposition is now enabled by default for semidefinite programs: chordal_decomposition_enable, chordal_decomposition_compact and chordal_decomposition_complete_dual are TRUE, and chordal_decomposition_merge_method is "clique_graph". On a semidefinite program with a decomposable sparsity pattern this is dramatically faster — on a banded example with a 120x120 semidefinite cone, 0.007 seconds against 422 seconds. Two consequences: the dual variables reported for semidefinite constraints are not in general the same as before, and data updates are blocked when a decomposition actually takes place. Linear, quadratic and second-order cone problems are unaffected and remain updatable. Pass chordal_decomposition_enable = FALSE for the previous behavior.
• reduced_tol_infeas_abs is now 5e-12, not 5e-5, matching upstream since Clarabel.rs v0.10.0. Smaller means less margin required, so the previous value was stricter than upstream; the change makes AlmostPrimalInfeasible and AlmostDualInfeasible marginally easier to reach on borderline problems.
• direct_solve_method is now "auto", not "qdldl", matching upstream since v0.11.0. This build links only the QDLDL solver, so "auto" resolves to the same code path and results are unchanged.
• Removed two direct_solve_method options that never worked: "cholmod" (never existed in Clarabel.rs; it is a Clarabel.jl option) and "mkl" (requires a Pardiso feature this build does not enable). The accepted values are "auto" and "qdldl".
• Corrected the documented defaults for tol_ktratio (1e-6, was documented as 1e-7) and iterative_refinement_reltol (1e-13, was documented as 1e-12). The code was already correct; only the help page was wrong.

clarabel 0.11.2

• Added persistent solver API for warm starts: clarabel_solver(), solver_solve(), solver_update(), solver_is_update_allowed()
• Robustified Rust interface: type coercion, error handling, CscMatrix validation, and regex ordering fixes
• Switched all R-side error messaging to cli::cli_abort() with markup
• Upgraded savvy crate from 0.8.13 to 0.9.2
• Added examples to clarabel_control() and solver functions
• Added vignette section on updating problem data (warm starts)
• Reduced CRAN test suite to LP and QP only; full suite runs locally via tinytest::at_home()
• Fixed macOS CRAN linker warning by forwarding MACOSX_DEPLOYMENT_TARGET to Rust cc crate during cargo build

clarabel 0.11.1

• Synced up to v0.11.1 of Clarabel.rs
• Fixed flang issues shown on CRAN for fedora-clang-rdevel

clarabel 0.10.1

• Minor fixes to fix CRAN issues

clarabel 0.10.0

• Synced up to v0.10.0 of Clarabel.rs
• Fixed up to use new r-src that detects R being used correctly (thank you, Ivan Krylov!)

clarabel 0.9.0.1

• Explicit system requirements for Rust and Cargo added.

clarabel 0.9.0

• Synced up to version 0.9.0 of Clarabel.rs
• Added all applicable tests from Clarabel.rs
• Updated documentation of cone specification
• Updated vignette
• Switched to savvy from rextendr

clarabel 0.5.1

• Clarabel now supports semidefinite programs (syncing up to version 0.5.1 of Clarabel.rs)
• Added tests
• Updated documentation of cone specification

clarabel 0.4.1

• First public release

clarabel documentation built on Aug. 23, 2026, 9:09 a.m.