Reproduce with build_companion_104.py --workspace <workspace> --output <fresh directory under installation/gameplay-fixes-20261030>. Requires immutable 1.0.3-r5 archives, reviewed Iris/portal overlays, local native dependencies and JDK25. The builder regenerates all changed production classfiles and the Iris template. Run validate_companion_104.py on the resulting candidate. Tests/stubs are not production files. No profile or original mod archive is modified.
