Config-driven Rack application serving the Relaton API v3 contract over a dataset directory. Sister implementation of the npm package @relaton/api; both are pinned by the shared conformance corpus.
gem install relaton-api
RELATON_DATA_DIR=./data rackup examples/config.ru
Structure and rules: autoload-only loading (no require_relative inside lib/), routes as a registry (OCP), model-driven responses via the relaton gem. See TODO.api/11-… in relaton/api.relaton.org for the roadmap.