diff --git a/docs/plans/original-completion-2026-10-02/checkpoints/p08-01-feasibility-r01/feasibility.json b/docs/plans/original-completion-2026-10-02/checkpoints/p08-01-feasibility-r01/feasibility.json
new file mode 100644
index 0000000..f326864
--- /dev/null
+++ b/docs/plans/original-completion-2026-10-02/checkpoints/p08-01-feasibility-r01/feasibility.json
@@ -0,0 +1,29 @@
+{
+  "scope": "Read-only feasibility of a different original unit; no implementation or acceptance",
+  "plan_id": "P08-01",
+  "source_head": "256253343ff01c38ef80b76820c9918d5b20f865",
+  "source_pins": {
+    "docs/traceability/original/BASELINE.txt": "75e4bdbdeb379c9269553f0c776bdb9cc96e01f2d6aa5ca650d132c63a8aeb1a",
+    "docs/plans/original-completion-2026-10-02/decisions.json": "ad0673051b0fa601e525f05128e0b11e2dddd9d4bae6a3e0170bbf47da35efe9",
+    "scripts/data/facility_definition.gd": "e90d56f7eab69c2a75238de465925c1c6df57ee6d44b3b81e7f6fcfd069af0a1",
+    "scripts/world/world_service.gd": "add67a0799f961a7dce1d382ea6dac67022fbd013f8c4c6b11321df96f37944a",
+    "scripts/construction/construction_service.gd": "c737eb7aa927097da677ac23ad649ef871af1dea54bcb8103348b88c5303ea25",
+    "docs/plans/original-completion-2026-09-29/execution/original_facility_mapping.json": "df0c933220449c8bb3e0fd942ad6f1dee49075abdd6587c4856022e12e3665cf"
+  },
+  "source_requirements": [
+    "Original chapter10 lists dimensions/layers and VIP high-floor requirement; magic cannon is specified on outer wall without rectangular dimensions.",
+    "The historical30-item map is identification input, not proof of current construction."
+  ],
+  "observed_model_limits": [
+    "FacilityDefinition MapZone has ANY/ABOVE_GROUND/BOUNDARY/UNDERGROUND, not a high-floor placement contract.",
+    "Construction validate_placement requires a valid definition, footprint, resource_state and cost; fresh default definition supplies gold100/material1/build60 without approved provenance."
+  ],
+  "not_selected_for_implementation": [
+    "All30 current construction acceptance cannot be claimed by adding geometry metadata alone.",
+    "High-floor eligibility and exterior-only footprint semantics require authority; do not choose a numeric threshold or proxy rectangular size.",
+    "Adding missing facility definitions with generic cost/build/staff/mana defaults would fabricate required production values."
+  ],
+  "safe_future_work": "Original literal geometry can be preserved as unaccepted input; actual30 construction integration must retain unknown parameters and obtain decisions.",
+  "game_modified": false,
+  "original_unit_complete": false
+}
diff --git a/docs/plans/original-completion-2026-10-02/plan_validation.json b/docs/plans/original-completion-2026-10-02/plan_validation.json
index fcf3585..53d4d2e 100644
--- a/docs/plans/original-completion-2026-10-02/plan_validation.json
+++ b/docs/plans/original-completion-2026-10-02/plan_validation.json
@@ -254,6 +254,6 @@
     "validate_facility_value_contracts.py": "91640e2a76cd6cc9186f7b85c0bf379b24b6cac0d48962815235ee628e7ae43e",
     "validate_plan.py": "23678227d9b3c556f1bd903f4b5b3147c4a82ce5085e10055481026803451b80",
     "validator_update_checks.json": "f997d0f3de2cea29550840b1d5cb23647d64f81329de46758551e2b6c8fecc27",
-    "work_packages.json": "f3bbd913709adec4b1057d5c1a7d9395f243fbda91c83a817f8b7360c2084c99"
+    "work_packages.json": "98943e9d766e6ab21a343d707c565bfc81f6de17a067534fd006b1e6c0fd7d58"
   }
 }
diff --git a/docs/plans/original-completion-2026-10-02/work_packages.json b/docs/plans/original-completion-2026-10-02/work_packages.json
index 6e92481..a2725ca 100644
--- a/docs/plans/original-completion-2026-10-02/work_packages.json
+++ b/docs/plans/original-completion-2026-10-02/work_packages.json
@@ -6738,7 +6738,16 @@
         "work": "未定義13件と闇市場を含め、正規ID・寸法・層・地上地下・高層・背面条件を固定する。",
         "acceptance": "30件の原本対応と個別建設条件が一致し、類似施設で代用しない。",
         "state": "planned",
-        "evidence": []
+        "evidence": [],
+        "selection_audit": {
+          "path": "docs/plans/original-completion-2026-10-02/checkpoints/p08-01-feasibility-r01/feasibility.json",
+          "sha256": "6c360ba3708a2ed9d50ca64a9acd275a960e94a06a281f28cf194195e186bd6f",
+          "scope": "Pre-selection feasibility only; delivery implementation not started; no original acceptance."
+        },
+        "remaining_gaps": [
+          "全30の現在の正規定義・個別建設条件と原本対応の検証。",
+          "VIP高層と外壁砲台の配置意味を原本/承認規約で確定。一般既定の費用・工期・人数・マナを未定義施設の本番値へ転記しない。"
+        ]
       },
       {
         "id": "P08-02",