The agent names the physical disk(s) under each storage place from /sys, udev and /proc/mounts only
(partition -> disk, dm/LVM thin -> slaves, loop -> backing file), keys them (eui / serial:<bus>:<model>
:<serial> / vendor WWN) and says proven or unknown (vm, network, usb_bridge, weak_wwn, no_serial).
GET /disks and the hub report's storage_targets gain kind, physical_disks, identity,
identity_reason (golden updated; the hub copy changes in the same session). POST /disks/same-disk
maps two guest paths to places the agent itself made and answers {different, proven, reason};
an absent drive is unmapped, never the root disk. Tests on fixture trees for every spike case,
red-proofed. CHANGELOG entry follows the release (release-complete gate).
Claude-Session: https://claude.ai/code/session_012qRErfCoiTkvDK9N5XHbzb
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