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HanifKoh
09530ef7c4
The mixed-colour metadata options are parallel per-slot arrays in the project config. A project saved before they were sized per slot stores a single value for the gradient ones, and one saved before they existed stores none. The GUI sizes all seven to the filament count when it opens a project; the CLI kept the stored arrays and exported one-element defaults for absent ones, so a project it exported carried one-element arrays where the GUI writes one entry per filament. Slicing is unaffected, every reader treats a missing entry as not mixed / no gradient, but the GUI-vs-CLI comparison reported the four gradient keys on every mixed-filament project. The resize helper moves from PresetBundle.cpp, where it was file-local, to PrintConfig.cpp next to set_filament_dev_options(). It creates an option the config lacks before sizing it, a no-op for the bundle's project config where all seven always exist. The CLI calls it with its filament count once the project and loaded filaments are merged, after the check that every mixed slot has a filament of its own.
OrcaSlicer tests
Building, running and writing tests is documented on the wiki, under How to Test.
Two files here rather than there, because coding agents only read what is in the repository: