From install to first window — 10 minutes

// A module declares everything in one descriptor — the shell builds the UI itself
core::ModuleDescriptor describe()
{
    core::ModuleDescriptor Module;
    Module.Id = QStringLiteral("documents");
    Module.Name = QStringLiteral("Documents");
    Module.Version = QStringLiteral("1.0.0");
    Module.ContractVersion = core::ModuleContractVersion;

    Module.Panels   = { /* document list, viewer */ };
    Module.Commands = { /* "New document", Ctrl+N */ };
    Module.Menus    = { /* menu items */ };
    Module.Themes   = { /* custom themes, if needed */ };

    return Module;
}

REGISTER_MODULE(describe())

// CMakeLists.txt — a single line:
// dockstudio_add_module(documents PLUGIN)