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Gradle will do its best to avoid reconciliation. That does depend on the type of change to A; if it's internal, no need to recompile consumers of the class. However, if the ABI changes (consumers binary view if the class’ interface) then consumers will need to be compiled.

if the changes (to either A or B) do not affect the public ABI, incremental compile avoidance should already work - at least for Java. for other languages it's trickier, e.g. https://youtrack.jetbrains.com/issue/KT-24203

So for kotlin, the things wont work as expected 😞 thank you guyz!