2.8.4 - released 2024-12-11

Changelog

Fixed exit code of the audit command not being meaningful (now 1 for vulnerabilities and 2 for abandoned, 3 for both) (#12203)
Fixed issue on plugin upgrade when it defines multiple classes (#12226)
Fixed duplicate errors appearing in the output depending on php settings (#12214)
Fixed InstalledVersions returning duplicate data in some instances (#12225)
Fixed installed.php sorting to be deterministic (#12197)
Fixed bump-after-update failing when using inline constraints (#12223)
Fixed create-project command to now disable symlinking when used with a path repo as argument (#12222)
Fixed validate --no-check-publish to hide publish errors entirely as they are irrelevant (#12196)
Fixed audit command returning a failing code when composer audit fails as this should not trigger build failures, but running audit as standard part of your build is probably a terrible idea anyway (#12196)
Fixed curl usage to disable multiplexing on broken versions when proxies are in use (#12207)

Full Changelog: https://github.com/composer/composer/compare/2.8.3...2.8.4