E4192

Compiler diagnostic name: invalid_moon_pkg_config.

Invalid configuration in moon.pkg.

moon.pkg accepts only package-level configuration fields understood by the build system. Unknown or misplaced keys are rejected so spelling mistakes do not silently change how a package is built.

This error is produced while the build system reads package configuration, before ordinary moon check diagnostic rendering is available, so it is not monitored by a source-level error-code example.