docs(installer): cite the wrapper live-step gate (#1816, sage-3747)

agents/gladstone/work/hostcheck-item5/BUILD.md

@@ -239,3 +239,13 @@ F1-F5 source verdicts and inspect this delta. Queue row still pending from Sage.
 | `scripts/case2-precheck.sh` | 19 | 0 |
 | `scripts/case2-unit.sh` | 1 | 1 |
 | `scripts/stack-copy.sh` | 3 | 0 |
+
+## F6 gate citation (sage-3747)
+
+Added scripts/stack-copy.sh:3 to the F6 wrapper step's explicit Mos-go requirement.
+This is doc-only; commands and tests are unchanged. Sage ruled the delete-after-
+setup missing-file negative meets mos-1537, so no fixture change is needed.
+Morgana-0213 found the fixture/F6 deltas CLEAN statically. No Node/tests run;
+Morgana's eventual run waits for Sage's row and CLEAR after the 220+216 landing.
+Numstat for this follow-up: host-run-sheet.md +1/-1; BUILD.md +9/-0.
+Static receipt: git diff --check passed.

docs/guides/host-run-sheet.md

@@ -243,7 +243,7 @@ When a run doesn't exit 0, send Mos the exit and the last lines of `/var/log/mos
 
 After `case2-install.sh` succeeds, create the human CLI wrapper before running
 `stack-copy.sh check --units external`. Creating this wrapper is a separate live
-step requiring Mos's go; the install does not create it. Run only on that go:
+step requiring Mos's go (`scripts/stack-copy.sh:3`); the install does not create it. Run only on that go:
 
 ```sh
 sudo -u mosaic -H /bin/sh <<'MOSAIC_WRAPPER'