Pure dependency-free core with self-contained JSON writer/parser. Absolute paths (incl. drive-relative) rejected at the add boundary; \uXXXX decoded to UTF-8 with surrogate pairs; malformed input returns nullopt.
Rename CMake project/module to reaper_reasampler, delete mpe_model/mpe_view, add minimal pure bank_model lib + placeholder CTest. main.cpp loads, logs to console, keeps the action-registration seam commented with the forever-stable CEREBELLUM_REASAMPLER_ action-id prefix.
daniel