Documents the PRJ/CONFIG-based Makefile build, external deps
(Armadillo, JsonCpp, JUCE), and the Rbm/Layer/AStack (DeepStack/RnnStack)
core architecture plus the three entry points (main.cpp, poet.cpp, gui.cpp).
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_019113s2pJdTtsUqsBdFgQAk