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Clicking the DNS cell in the targets list opened the generic target dialog: there was no DNS modal at all. There is one now, and it renders through the same `dns-tab` the target page uses, so the records, the type filters, the provider labels and the refresh are one component in two places. DNS is also a relation. `dns_record` links two targets on a mail host, a zone contact, an address or an SPF include - and only when the estate owns the name. On the four unrelated estates here the only shared DNS values are Google's MX hosts and an `include:mail.zendesk.com` that briefly linked Shopify to HackerOne, which is the landlord problem in a new dress: a SaaS sender is authorised by everyone. A mail host, a zone contact or an include counts when its registrable domain is a target of the project, so `mail.zendesk.com` says nothing and `serviceproviders.uber.com` says everything. Measured: adding ubereats.com links it to uber.com on the SOA contact alone, past nameservers (UltraDNS) and MX (Google) that say nothing. An NS record is left to the WHOIS nameserver relation, so a fact appears once, and an address that cdncheck flagged is not a shared machine. `is_shared_host` folds the nameserver, shared-edge and mail-provider lists into one judgement, so `aspmx.l.google.com`, `awsdns-hostmaster.amazon.com` and `gold.foundationdns.com` are all recognised as rented. The DNS and BGP modals carry a Shared with block through one `related-targets` component: the other targets and the evidence, filtered to the kinds that modal is about. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01YYop31s6BqDUt4TBs5mbwa