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Missing APX Field in APC Projects Means Status Is Unknown, Not Installed

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A project's .apc/project.json may include an apx field, and its absence or a null value means the project has not declared its APX status rather than confirming installation. The article argues that treating unknown as installed leads to brittle automation, while treating it as declined could hide useful local tooling. An explicit value of installed signals that APX is available for the project, whereas declined signals a deliberate choice to avoid suggesting or running APX there. When the field is missing, the recommended approach is a local availability check only when APX would help the current task. Because APX is installed per machine and project metadata travels with Git, maintainers should set the field deliberately rather than assume it.

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