You can call any method that has no arguments in data-sly-test.In your case check if your item has these methods.

the error indicates that the class can't found. Either the code is not deployed, or the bundle is not active.can you check at /system/console/services whether the service is available?

for the main-modes I would go for ${wcmmode.edit}, no need for extra libs

When using Resource you can reuse without a UI in mind, when using request you can also access request-info.

here you see the source code, first it tries via request and then resource:sling-org-apache-sling-scripting-sightly-models-provider/SlingModelsUseProvider.java at master · apache/sling-org-apache…

here you can find the right version of the uber-jar:  Index of /groups/public/com/adobe/aem/uber-jar

"I think the default adaptable is request "It is really about what is done first, request or resource. Nothing about priority here

see here an example: htl-examples/MyServiceConfiguration.java at master · heervisscher/htl-examples · GitHub @AttributeDefinition(name = "Multiple-Values", description = "Multi Configuration values")String[] getStringValues();

Also you are mixing annotations (osgi and felix)import org.osgi.service.component.annotations.Component;import org.apache.felix.scr.annotations.Properties;import org.apache.felix.scr.annotations.Property;

you are missing a " here: <div data-sly-repeat.result=${model.result}">