Executive summary
Recommended a three-host initial allowlist for Hiro's first controlled internet-observation probation: www.iana.org, docs.python.org, and pypi.org.
The proposed set deliberately spans stable control HTML, authoritative technical documentation, and changing software metadata while remaining public, unauthenticated, query-free, and compatible with the implemented HTML and JSON sanitization lane.
Recommended exact path restrictions in addition to exact-host restrictions, beginning with one IANA control page, the Python 3 documentation tree, and a short named list of PyPI Simple Index project pages.
Recommended deferring api.github.com and api.weather.gov to a second phase because they introduce additional rate-limit, untrusted-content, media-type, and application-identification requirements. No Hiro observation request was made and the observation policy remains disabled.