piguard is legitimately in the request path as the reverse proxy; only the stale endpoint forms (piguard:4000, koala:4000) are wrong. Per brain#6 review amendment #3 / tapir#18 follow-on.
Phase 1 of the ubiquitous-language system (tapir#18). Tapir-specific terms verified against domain/ports code + README/VISION; homelab-core terms (brain sink, LiteLLM gateway) derived from brain#5 glossary. Tooling-free pilot.