diff --git a/prod/clean_arch/violet/shadow_journal.py b/prod/clean_arch/violet/shadow_journal.py
index 87eeeff..5c21bff 100644
--- a/prod/clean_arch/violet/shadow_journal.py
+++ b/prod/clean_arch/violet/shadow_journal.py
@@ -40,6 +40,14 @@ class DecisionRow(StrictModel):
     ars_score: float = Field(allow_inf_nan=False)
     bucket_idx: int = Field(ge=0, le=255)        # UInt8
     actuated: int = Field(ge=0, le=1)
+    # V3.4 full-sizing breakdown (Nullable(Float64) in DDL): NULL on the base-only
+    # path, populated when live SizingFactors drive the decision. ge=0.0 — leverage
+    # and all four multipliers are non-negative by BLUE's construction.
+    base_leverage: Optional[float] = Field(default=None, ge=0.0, allow_inf_nan=False)
+    dc_lev_mult: Optional[float] = Field(default=None, ge=0.0, allow_inf_nan=False)
+    regime_size_mult: Optional[float] = Field(default=None, ge=0.0, allow_inf_nan=False)
+    market_ob_mult: Optional[float] = Field(default=None, ge=0.0, allow_inf_nan=False)
+    esof_size_mult: Optional[float] = Field(default=None, ge=0.0, allow_inf_nan=False)
 
 
 class VioletDecisionJournal:
@@ -70,6 +78,13 @@ class VioletDecisionJournal:
                 ars_score=float(decision.ars_score),
                 bucket_idx=int(decision.bucket_idx),
                 actuated=1 if decision.actuated else 0,
+                # getattr-with-None: duck-typed decisions (and the base-only path)
+                # may omit the breakdown; it stays NULL rather than raising here.
+                base_leverage=getattr(decision, "base_leverage", None),
+                dc_lev_mult=getattr(decision, "dc_lev_mult", None),
+                regime_size_mult=getattr(decision, "regime_size_mult", None),
+                market_ob_mult=getattr(decision, "market_ob_mult", None),
+                esof_size_mult=getattr(decision, "esof_size_mult", None),
             )
         except ValidationError as exc:
             self.rows_rejected += 1
diff --git a/prod/clean_arch/violet/test_violet_shadow_journal.py b/prod/clean_arch/violet/test_violet_shadow_journal.py
index 3622002..86c1433 100644
--- a/prod/clean_arch/violet/test_violet_shadow_journal.py
+++ b/prod/clean_arch/violet/test_violet_shadow_journal.py
@@ -71,3 +71,47 @@ def test_negative_exposure_rejected():
     )
     assert j.journal(bad, mono_ns=1) is False
     assert j.rows_rejected == 1
+
+
+_BREAKDOWN_COLS = (
+    "base_leverage", "dc_lev_mult", "regime_size_mult",
+    "market_ob_mult", "esof_size_mult",
+)
+
+
+def test_full_factor_breakdown_round_trips_into_row():
+    captured = []
+    j = VioletDecisionJournal(sink=lambda t, r: captured.append(r), session_id="s")
+    dec = _decision(
+        base_leverage=4.0, dc_lev_mult=1.5, regime_size_mult=1.2,
+        market_ob_mult=1.4, esof_size_mult=0.95,
+    )
+    assert j.journal(dec, mono_ns=1) and j.rows_emitted == 1
+    row = captured[0]
+    assert set(row.keys()) == _ddl_columns()        # parity holds with new columns
+    assert row["base_leverage"] == 4.0 and row["dc_lev_mult"] == 1.5
+    assert row["regime_size_mult"] == 1.2 and row["market_ob_mult"] == 1.4
+    assert row["esof_size_mult"] == 0.95
+
+
+def test_base_only_path_leaves_breakdown_null():
+    captured = []
+    j = VioletDecisionJournal(sink=lambda t, r: captured.append(r), session_id="s")
+    assert j.journal(_decision(), mono_ns=1)        # no breakdown supplied
+    row = captured[0]
+    assert all(row[c] is None for c in _BREAKDOWN_COLS)
+
+
+def test_negative_breakdown_multiplier_rejected_at_source():
+    j = VioletDecisionJournal(sink=lambda t, r: None, session_id="s")
+    # ShadowDecision itself guards ge=0.0, so build a duck-typed decision that
+    # smuggles a negative multiplier past the engine to prove the row guard catches it.
+    bad = SimpleNamespace(
+        scan_number=1, asset="BTCUSDT", side="SHORT", vel_div=-0.2,
+        fraction=0.2, conviction_leverage=9.0, notional_fraction=1.8,
+        target_exposure=1.0, ars_score=1.0, bucket_idx=1, actuated=True,
+        base_leverage=4.0, dc_lev_mult=-0.5, regime_size_mult=1.0,
+        market_ob_mult=1.0, esof_size_mult=1.0,
+    )
+    assert j.journal(bad, mono_ns=1) is False
+    assert j.rows_rejected == 1
diff --git a/prod/clickhouse/violet/22_violet_decisions.sql b/prod/clickhouse/violet/22_violet_decisions.sql
index e4a8307..dad94d8 100644
--- a/prod/clickhouse/violet/22_violet_decisions.sql
+++ b/prod/clickhouse/violet/22_violet_decisions.sql
@@ -19,7 +19,16 @@ CREATE TABLE IF NOT EXISTS dolphin_violet.violet_decisions
     `target_exposure`     Float64,
     `ars_score`           Float64,
     `bucket_idx`          UInt8,
-    `actuated`            UInt8
+    `actuated`            UInt8,
+    -- V3.4 full-sizing breakdown: conviction = base × dc × regime(ACB) × ob × esof,
+    -- capped @9. NULL on the legacy base-only path (no live SizingFactors); populated
+    -- when the launcher feeds live factor planes. Additive columns — on a pre-existing
+    -- table apply the matching `ALTER TABLE ... ADD COLUMN IF NOT EXISTS` instead.
+    `base_leverage`       Nullable(Float64),
+    `dc_lev_mult`         Nullable(Float64),
+    `regime_size_mult`    Nullable(Float64),
+    `market_ob_mult`      Nullable(Float64),
+    `esof_size_mult`      Nullable(Float64)
 )
 ENGINE = MergeTree
 ORDER BY (asset, ts)