Preparation of loo release 2.10

[florence-bockting]

Description

This PR prepares the loo release 2.10.
See file notes-release.md for further information.

TODOS

• update DESCRIPTION (version, date)
• update NEWS.md
• update release notes in GitHub based on updated NEWS.md
• run reverse dependency checks
  • see further information in Comment
• run withr::with_envvar(c("NOT_CRAN" = "true"), devtools::check_mac_release())
• run withr::with_envvar(c("NOT_CRAN" = "true"), devtools::check_win_devel())
• update cran-comments.md (send to Jonah)
• inform flocker author about release
• update date in DESCRIPTION file when doing the release

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.70%. Comparing base (57aab3e) to head (7710485).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #375   +/-   ##
=======================================
  Coverage   92.70%   92.70%           
=======================================
  Files          31       31           
  Lines        3029     3029           
=======================================
  Hits         2808     2808           
  Misses        221      221           

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[github-actions]

This is how benchmark results would change (along with a 95% confidence interval in relative change) if 7710485 is merged into master:

• ✔️loo_function: 1.88s -> 1.88s [-0.2%, +0.46%]
• ✔️loo_matrix: 1.65s -> 1.65s [-0.42%, +0.19%]
  Further explanation regarding interpretation and methodology can be found in the documentation.

[florence-bockting]

Note on reverse dependency checks:

The following packages failed to install when using revdepcheck::revdep_check(), therefore I created a fork of each package and run devtools::check() locally using loo version 2.10 as dependency. All packages passed the tests:

• bayesdfa
• footBayes
• TriDimRegression
• pcFactorStan
• rtmpt

[florence-bockting]

Output of withr::with_envvar(c("NOT_CRAN" = "true"), devtools::check_mac_release()):

* using log directory '/Volumes/PkgBuild/work/1782110718-279f6c629fe09119/packages/sonoma-arm64/results/4.6/loo.Rcheck'
* using R version 4.6.0 Patched (2026-04-24 r89963)
* using platform: aarch64-apple-darwin23
* R was compiled by
    Apple clang version 17.0.0 (clang-1700.3.19.1)
    GNU Fortran (GCC) 14.2.0
* running under: macOS Tahoe 26.5.1
* using session charset: UTF-8
* current time: 2026-06-22 06:45:39 UTC
* checking for file 'loo/DESCRIPTION' ... OK
* checking extension type ... Package
* this is package 'loo' version '2.10.0'
* package encoding: UTF-8
* checking package namespace information ... OK
* checking package dependencies ... OK
* checking if this is a source package ... OK
* checking if there is a namespace ... OK
* checking for executable files ... OK
* checking for hidden files and directories ... OK
* checking for portable file names ... OK
* checking for sufficient/correct file permissions ... OK
* checking whether package 'loo' can be installed ... [2s/2s] OK
* checking installed package size ... OK
* checking package directory ... OK
* checking 'build' directory ... OK
* checking DESCRIPTION meta-information ... OK
* checking top-level files ... OK
* checking for left-over files ... OK
* checking index information ... OK
* checking package subdirectories ... OK
* checking code files for non-ASCII characters ... OK
* checking R files for syntax errors ... OK
* checking whether the package can be loaded ... [0s/0s] OK
* checking whether the package can be loaded with stated dependencies ... [0s/0s] OK
* checking whether the package can be unloaded cleanly ... [0s/0s] OK
* checking whether the namespace can be loaded with stated dependencies ... [0s/0s] OK
* checking whether the namespace can be unloaded cleanly ... [0s/0s] OK
* checking loading without being on the library search path ... [0s/0s] OK
* checking whether startup messages can be suppressed ... [0s/0s] OK
* checking dependencies in R code ... OK
* checking S3 generic/method consistency ... OK
* checking replacement functions ... OK
* checking foreign function calls ... OK
* checking R code for possible problems ... [2s/2s] OK
* checking Rd files ... [0s/0s] OK
* checking Rd metadata ... OK
* checking Rd cross-references ... OK
* checking for missing documentation entries ... OK
* checking for code/documentation mismatches ... OK
* checking Rd \usage sections ... OK
* checking Rd contents ... OK
* checking for unstated dependencies in examples ... OK
* checking contents of 'data' directory ... OK
* checking data for non-ASCII characters ... [0s/0s] OK
* checking LazyData ... OK
* checking data for ASCII and uncompressed saves ... OK
* checking R/sysdata.rda ... OK
* checking installed files from 'inst/doc' ... OK
* checking files in 'vignettes' ... OK
* checking examples ... [1s/1s] OK
* checking for unstated dependencies in 'tests' ... OK
* checking tests ... [15s/8s] OK
  Running 'testthat.R' [15s/8s]
* checking for unstated dependencies in vignettes ... OK
* checking package vignettes ... OK
* checking re-building of vignette outputs ... [10s/16s] OK
* checking PDF version of manual ... [3s/4s] OK
* DONE
Status: OK
* using check arguments '--no-clean-on-error '
* elapsed time (check, wall clock): 0:49
* result classification: OK, errors:no, warnings:no, notes:no