storage identity build B: live proof, R-1068/R-1079/R-1082/R-1084 closed, R-1093/R-1094 opened, D15, golden 0.318.0 record, backup page

A fresh one-disk install (512 GB VM, installer 1.33.0, agent 0.158.1 + golden 0.318.0 vouched): data volume 100 GiB, data
area 213 GiB registered as the default drive with no press, Jellyfin with no extra step, nothing of the area in a whole-box
copy; partitions formatted and used; the honest backup offer on a VM; /mnt/sys_drive never offered (no box had it).
16 §13 build B status; capability map D15; poster facts (drawing needs a refresh, STATUS); the backup page HU+EN now that
it is true; REPORT-storage-identity-buildB-2026-10-16.md.

Claude-Session: https://claude.ai/code/session_012qRErfCoiTkvDK9N5XHbzb

documentation/architecture/capability-map-detail/D.md

@@ -268,3 +268,29 @@ the installer (R-1079).
 
 ---
 
+<a id="d15"></a>
+## D15 — The one-disk box's own data area; partitions as places
+
+*Map row: [D15](../00-capability-map.md#d15) · added 2026-10-16.*
+
+**Scenario:** a household with one disk installs a media app and expects it to work with no extra step — and expects its
+films not to fill every whole-box copy. A household with a split disk wants to use the free part without wiping the rest.
+
+**Components:** installer 1.33.0 (step 3 sizes the data volume by the ruled table; step 5b runs the bundle's root helper
+`felhom-internal-place`), agent v0.158.1 (mounts the place like a drive, kind `internal`; lists partitions; the signed
+`add_internal_place` for an old box), controller v0.318.0 (binds and registers it as the default drive; the partition
+wizard). Design: `architecture/16-storage-physical-identity.md` §5–§7, §9, §13; sizes: `audits/storage-identity-buildB-2026-10-15/SPACE-CHECK.md`.
+
+**Status:** **PROVEN-LIVE** (2026-10-16) on a fresh 512 GB one-disk VM from the public ISO and installer: data volume 100 GiB,
+data area 213 GiB, registered as the default drive with no press, Jellyfin installed with no extra step onto it, a whole-box
+copy holds nothing of it; partitions formatted and used through the wizard; formatting the whole disk under a used part
+refused in words.
+
+**Unit only:** the old-box signed job (no box with ≥ 20 GiB free thin space was at hand), the D4 sentence (R-1068's other
+half). **Known gaps:** an empty part asks for the typed confirmation (R-1093); the whole-disk refusal sentence (R-1094); a
+part next to a mounted part can only be used, not formatted (the root wrapper trusts no „Felhom's own" claim, `16` §13).
+
+**Evidence:** `audits/storage-identity-buildB-2026-10-15/README.md`.
+
+---
+