try to fix roadblocks

docs/ordinary-game-startup.md

@@ -118,3 +118,10 @@ Before requesting `System.MakeScreenshot("$logs:err-ordinary-prison")`, the help
 [121730](evidence/game-2026-09-19-121730-prison-view/report.json) passes ordinary Chat startup and the optional capture. The [unaltered player view](evidence/game-2026-09-19-121730-prison-view/ordinary-prison-view.png) shows the prisoner inside the authored walls with the correct escape objective and instructions. The exact native BMP is retained beside a documented lossless PNG conversion. The image also exposed tall wheat inside the yard; the first bounded decal candidate in [122353](evidence/game-2026-09-19-122353-yard-candidate/report.json) clears only a small central patch and is not yet full-yard treatment. Neither capture supplies player-input or full-route acceptance.
 
 [125906 integrated startup](evidence/game-2026-09-19-125906-integrated-prison/report.json) passes after the admission-budget, interaction-feedback, optional aircraft-target and stock-scale yard changes. The native player view remains correct. The scale-ten vanilla decal clears a larger irregular patch while wheat remains near and within parts of the enclosure; complete yard clearance is not claimed. This is ordinary-game startup and initial-view evidence only.
+
+Roadblock props remain replicated independently of player distance so an admin
+viewing the island through Game Master can see the same barriers as nearby
+players. This is limited to the ten props per post (at most 300); guard and
+vehicle streaming is unchanged. A post is counted only after all ten props have
+valid replication nodes. Local Workbench validation does not by itself prove
+remote-client visibility.