relUrls() picked MusicBrainz link relations by substring (u.includes("bandcamp.com")) with
no scheme check, so a non-http(s) resource or a look-alike host (https://evilbandcamp.com,
javascript:...bandcamp.com...) could be returned and become an injected link's href. Now:
isHttpUrl() accepts http/https only, and matching is by PARSED hostname (=== host ||
endsWith "."+host). Resolver-only; extension unaffected; pure + unit-tested (18 total green).
Source: plan/steward-linker-security SCOUT 2026-06-17.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>