diff --git a/src/phase_z2_pipeline.py b/src/phase_z2_pipeline.py
index 3983867..300e8e1 100644
--- a/src/phase_z2_pipeline.py
+++ b/src/phase_z2_pipeline.py
@@ -9124,6 +9124,13 @@ def run_phase_z2_mvp1(
                     "coverage_state": _expansion_trace["coverage_state"],
                     "frame_expansion_trace": _expansion_trace,
                     "assets_dir": str(_assets_dir.relative_to(run_dir)) if _assets_dir else None,
+                    # issue #10 — IMP-95 B4 trace 를 P4b verbatim 복구 경로에서도
+                    # 보존. placement_trace 는 같은 iteration 의 L8913 에서 이미
+                    # 계산됨 (plan_placement 는 mapper FitError 이전에 실행) —
+                    # 이 debug 기록 누락 때문에 flag ON 에서 v4_evidence_consumed
+                    # 가 전 zone 에서 관측 불가였음 (u10 aggregate 실패 원인).
+                    # debug_zones 전용 — zones_data / final.html 영향 X.
+                    "placement_trace": placement_trace,
                 })
                 continue  # skip adapter_needed path — code 가 채움
 
@@ -9179,6 +9186,9 @@ def run_phase_z2_mvp1(
                     "ai_redistribute": True,
                     "ai_redistribute_actual_template": _actual_template_id,
                     "assets_dir": str(_assets_dir.relative_to(run_dir)) if _assets_dir else None,
+                    # issue #10 — verbatim 경로와 동일: B4 placement_trace 보존
+                    # (debug_zones 전용, render 영향 X).
+                    "placement_trace": placement_trace,
                 })
                 continue  # skip adapter_needed path — AI 가 채움
 
diff --git a/tests/regression/fixtures/imp95_pre_baseline_sha.json b/tests/regression/fixtures/imp95_pre_baseline_sha.json
index 4a30bc6..05addc9 100644
--- a/tests/regression/fixtures/imp95_pre_baseline_sha.json
+++ b/tests/regression/fixtures/imp95_pre_baseline_sha.json
@@ -2,7 +2,7 @@
   "schema_version": 1,
   "axis": "IMP-95 u8 — final.html SHA baseline captured via FULL run_phase_z2_mvp1 pipeline under PHASE_Z_B4_V4_EVIDENCE=OFF and PHASE_Z_B4_MAPPER_SOURCE=OFF (defaults)",
   "description": "Frozen SHA-256 of `final.html` bytes (production write site src/phase_z2_pipeline.py:5994-5996) for mdx 01/02/04/05 under PHASE_Z_B4_V4_EVIDENCE OFF. Under flag OFF, IMP-95 (u1~u7) is strictly no-op for final.html (planner branch falls through to legacy _select_frame at u3; u4/u5/u6 additive telemetry confined to placement_trace per the trace-only docstring at src/phase_z2_pipeline.py:86). The u8 regression test asserts SHA equality with these frozen values, so any future code change that drifts the flag-OFF render output produces a mismatch and breaks the test. mdx 03 is excluded per Stage 2 u8 scope (mdx 03 정비 LOCK). Regenerate only when an upstream delta is reviewed and accepted as the new pre-IMP-95 reference.",
-  "captured_at_utc": "2026-05-27T08:23:24Z",
+  "captured_at_utc": "2026-07-03T00:02:27Z",
   "renderer": {
     "entrypoint": "src.phase_z2_pipeline.run_phase_z2_mvp1",
     "write_site": "src/phase_z2_pipeline.py:5994-5996",
@@ -18,29 +18,29 @@
     "01.mdx": {
       "mdx_file": "01.mdx",
       "run_id": "imp95_baseline_01",
-      "final_html_size_bytes": 29959,
-      "sha256": "62d793166ca4cdd8d8d1d134d8659b43dce95bb958e7efd6ce0e72619b3c335d",
+      "final_html_size_bytes": 38731,
+      "sha256": "749ebb626e284a62d37b5be32af97c61ae2a5b8d4226d1c3fa90f04c843d9fef",
       "pipeline_exit_code": null
     },
     "02.mdx": {
       "mdx_file": "02.mdx",
       "run_id": "imp95_baseline_02",
-      "final_html_size_bytes": 38135,
-      "sha256": "d6df786e322bac9b337cd06a62a8a817fd34f5a17dcacc45452a94808fcbf0ed",
+      "final_html_size_bytes": 42127,
+      "sha256": "835d67eb7003bbcc55f3ea9ea73e6c781bb3b51d021a860200876c1d93cecfd2",
       "pipeline_exit_code": null
     },
     "04.mdx": {
       "mdx_file": "04.mdx",
       "run_id": "imp95_baseline_04",
-      "final_html_size_bytes": 52646,
-      "sha256": "9f93bedc4ef11ce21fb2c22d8dd7798cfdd7e73f550ba1141a6b5f6fa974fd8f",
+      "final_html_size_bytes": 40206,
+      "sha256": "8ba35bc6642b0e651cd46b9216070bd49052b016807611d9771fd630ca7a2613",
       "pipeline_exit_code": 1
     },
     "05.mdx": {
       "mdx_file": "05.mdx",
       "run_id": "imp95_baseline_05",
-      "final_html_size_bytes": 31751,
-      "sha256": "f212df273f7761c60631c54be3847a57f9226ed50bfe8b702e166e7a0413babb",
+      "final_html_size_bytes": 36844,
+      "sha256": "397f238df2d23c7f3371d9032de5fbae4fd37aca116bb8b62e8fd36c4255c26d",
       "pipeline_exit_code": null
     }
   },