Worked on strengthening the post-compile analysis path in sbt/zinc to improve build stability when optional dependencies are missing. Focused on robust inner-class handling, the solution introduced a fallback mechanism that parses classfiles directly when reflection fails, preventing NoClassDefFoundError during analysis. Enhanced error handling and logging in the ClassToAPI component allowed the system to surface warnings and skip problematic inner classes, isolating issues and reducing crash scenarios. All changes were implemented in Scala and Java, with targeted tests ensuring resilience across module boundaries. This work deepened backend development expertise, particularly in API design and error handling for complex build systems.