Checklist v4 from contracts: step 31, each wheel by hand

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01DDwfd6Ki8UfG4hK6W5YpJz

assets/contracts/checklists/z27ag-captures.json

@@ -1,6 +1,6 @@
 {
   "id": "z27ag-captures",
-  "version": 3,
+  "version": 4,
   "title": "Z27AG decoding captures",
   "about": "docs/impl/plans/Z27AG-CAPTURES.md",
   "mark_format": "<step> <action>[ #<n>] start|end for a span, <step> <action>[ #<n>] for a point",
@@ -445,6 +445,30 @@
               "hold_s": 10
             }
           ]
+        },
+        {
+          "id": "31",
+          "title": "One wheel at a time, by hand",
+          "do": "Ignition on, engine off, neutral. A front: hold the other front still (open differential: in neutral the turned wheel spins the gearbox, not its partner) and spin this one briskly by hand, forward, about one turn a second; start as it turns, end as you stop. A rear, if you raise it: rears turn freely, no holding needed. Fronts are enough if the rears are not up.",
+          "finds": "which word of 235 is which wheel, one at a time (the drives already point to bytes 0-1 front right, 2-3 front left, 4-5 rear right, 6-7 rear left); also the slowest speed the ABS reports",
+          "actions": [
+            {
+              "label": "front left by hand",
+              "hold_s": 10
+            },
+            {
+              "label": "front right by hand",
+              "hold_s": 10
+            },
+            {
+              "label": "rear left by hand",
+              "hold_s": 10
+            },
+            {
+              "label": "rear right by hand",
+              "hold_s": 10
+            }
+          ]
         }
       ]
     },