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SNMP devices are config-defined by IP/hostname, not Steward Host records, so they had no presence on a host's page. Map them by address and embed a fragment (mirrors the Docker per-host fragment). - _devices_for_host(devices_cfg, address, name): case-insensitive match of a device's configured host to the Steward host's address or name (tolerates non-dict / host-less entries). - Route /plugins/snmp/host/<id>: renders the matched device(s) + latest readings, or nothing when none map (so hosts without SNMP carry no empty card). - snmp/host_panel.html: per-device card (name · address · reachability) with a readings grid (K/M scaling) and a History link to the full device page. - hosts/detail.html embeds it after the Docker fragment, gated on snmp enabled. - Unit test for the matching helper (by address, by name, no-match, blank). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_016Jg27rgypiW2efULXJDtMC