SPEC — detz v0.1.0

moloapp pin: 12e45e8 264 classes in ../tai.py (grep ^class). Full parity table per docs/.md. Target tree: src/{cli,config,util,shell,seal,store,llm,agent,comms,plexer,tui,mcp,cap}. Build: -std=c++23 -Wall -Wextra, outputs only in build/.