docs: register Opus-selected original P19 reachability audit scope

docs/plans/original-completion-2026-10-02/progress_snapshot.json

@@ -152,13 +152,13 @@
   },
   "current_package_state_counts": {
     "completed": 1,
-    "in_progress": 27,
-    "planned": 2
+    "in_progress": 28,
+    "planned": 1
   },
   "current_delivery_state_counts": {
     "completed": 14,
-    "in_progress": 24,
-    "planned": 50
+    "in_progress": 25,
+    "planned": 49
   },
   "completed_current_deliveries": [
     "P00-01",
@@ -9713,7 +9713,7 @@
     "execution": "the-tree-p06-01 Runner; recorded Claude decision, one Codex implementer",
     "current_gate_status": "not implemented or executed; formal completion not accepted"
   },
-  "next_closure_plan_id": "P24-02",
+  "next_closure_plan_id": "P19-03",
   "p24_03_formal_closure": "docs/plans/original-completion-2026-10-02/execution/p24-03-formal-closure-r01/closure.json",
   "new_engine_run_scope": "Supplemental positive metadata diagnostic r01 failed cleanup preparation/log isolation; r02 passed17checks unchanged source and entire default profile. No duplicated full game regression.",
   "current_closure_targets": {
@@ -10476,5 +10476,13 @@
       "artifact": "FORMAL_FINAL.json"
     },
     "whole_original_acceptance": false
+  },
+  "current_p19_03_reachability": {
+    "state": "contract_preparation",
+    "spec": "docs/plans/original-completion-2026-10-02/execution/p19-03/TASK_SPEC.json",
+    "actual_opus": "dc342e4d69154660bef7e688a70fd783",
+    "original_unit_credit": 0,
+    "source_anchor": "1b07b87d3736e777932315a4bdde8b70cbf9cb23",
+    "P04_existing_questions": "preserved; no duplicate question or fake answer"
   }
 }