openai/gpt-chat-latest → B (3:2)

Side B consolidates canonical path handling by introducing shared helpers (`tilde_http_path_to_canonical`, normalized ontology-root storage) and updates ranking, breadcrumb, and garden code to use normalized keys, fixing root-path inconsistencies and adding broad regression coverage. Side A correctly removes browser sentinel delegates by making pending-session agents optional and prevents shared delegate binding for browser users, but its scope is narrower than B's cross-cutting path normalization and routing improvements.