stan-dev/cmdstanr v0.9.0 on GitHub

General Improvements/Changes

Added compatibility for RTools45 (#1066)
cmdstanr will now use RTools with no additional toolchain updates needed on Windows (CmdStan 2.35+ only; #1065, #1054)
Improve error messages when calling sampler_diagnostics() with fixed_param=TRUE
Improve numerical stability in calculation of effective sample size during loo method (#1057)
Improve numerical stablity with very small log-ratios in calculation of effective sample size during loo method (#1015)
Add warning if input data/inits have been coerced to ints (#994)

Don't require fixed_param for models with zero parameters (only GQs) for CmdStan >= 2.36 (#1046)
Improve detection/handling of make (#1036)
Fix saving of model objects to network drive (#1038, thanks to @bschneidr)
Update usage of untar to fix installation errors (#1034)
Respect compilation flags in make/local when exposing functions or model methods (#1003)
Fix passing of include paths to CmdStan (#1000)
Fix passing of factor data to CmdStan (#999)
Fix extraction and passing of array data/parameters as model inits (#993)

Clarifications to usage of optimize and loo methods (#1060)
Add documentation for faster model saving with large models (#1042)
Remove mentions of rstan::read_stan_csv due to incompatibility with newer CmdStan outputs (#1018)
Document global option cmdstanr_print_line_numbers for printing line numbers (#1017)
Change usage of 'chapter' to 'section' in documentation (#1014)
Remove examples of updating removed array syntax as functionality no longer supported in CmdStan (#1008)
Change usages of 'sampling statement' -> 'distribution statement' (#987)

Full Changelog: v0.8.1...v0.9.0