diff --git a/application/account_new_risk_gate_support.py b/application/account_new_risk_gate_support.py
index 2fa2189..fb56ac4 100644
--- a/application/account_new_risk_gate_support.py
+++ b/application/account_new_risk_gate_support.py
@@ -2,6 +2,7 @@
 
 from __future__ import annotations
 
+import json
 import math
 import os
 from collections.abc import Mapping
@@ -15,6 +16,7 @@
     NewRiskDisposition,
     evaluate_new_risk_admission,
 )
+from quant_platform_kit.risk.contracts import RuntimeRiskLimits
 from quant_platform_kit.risk.cycle_new_risk_health import (
     CycleNewRiskHealthEvidence,
     apply_cycle_new_risk_health_axes,
@@ -24,10 +26,14 @@
 )
 
 ACCOUNT_NEW_RISK_GATE_ENV = "ACCOUNT_NEW_RISK_GATE"
+_MAX_DAILY_LOSS_ENV_KEYS = ("SCHWAB_MAX_DAILY_LOSS_USD", "MAX_DAILY_LOSS_USD")
 
 _DEFAULT_STRATEGY_PROFILE = "soxl_soxx_trend_income"
 _DEFAULT_DOMAIN = "us_equity"
 
+# Minimal carrier for gate-only daily-loss axis; not a production RRL binding.
+_DAILY_LOSS_LIMIT_CARRIER_SYMBOL = "SPY"
+
 _cycle_snapshot: InjectedReconciliationSnapshot | None = None
 
 
@@ -48,6 +54,14 @@ def _coerce_optional_float(value: object) -> float | None:
     return number
 
 
+def _positive_limit_or_none(value: object) -> float | None:
+    """Accept only finite positive limits; never invent a production default."""
+    number = _coerce_optional_float(value)
+    if number is None or number <= 0.0:
+        return None
+    return number
+
+
 def _resolve_equity_usd(portfolio: Mapping[str, Any], execution: Mapping[str, Any] | None) -> float | None:
     """Map Schwab account equity from broker liquidation value or plan portfolio."""
     for key in ("total_equity", "total_strategy_equity"):
@@ -200,6 +214,83 @@ def _resolve_drawdown_from_peak(
     return max(0.0, 1.0 - (equity_usd / peak_equity_usd))
 
 
+def _resolve_explicit_daily_loss_usd(
+    projection: Mapping[str, Any],
+    portfolio: Mapping[str, Any],
+    execution: Mapping[str, Any] | None,
+) -> float | None:
+    """Pass through an explicit daily_loss_usd fact only; never invent one."""
+    for source in (projection, portfolio, _mapping_or_empty(execution)):
+        if "daily_loss_usd" in source:
+            return _coerce_optional_float(source.get("daily_loss_usd"))
+    return None
+
+
+def _max_daily_loss_from_runtime_target_json() -> float | None:
+    """Read max_daily_loss_usd from RUNTIME_TARGET_JSON when present; soft-omit on errors."""
+    raw_target = os.environ.get("RUNTIME_TARGET_JSON")
+    if raw_target is None or not str(raw_target).strip():
+        return None
+    try:
+        payload = json.loads(raw_target)
+    except (TypeError, ValueError):
+        return None
+    if not isinstance(payload, dict):
+        return None
+    policy = payload.get("runtime_risk_limits")
+    if not isinstance(policy, dict) or "max_daily_loss_usd" not in policy:
+        return None
+    return _positive_limit_or_none(policy.get("max_daily_loss_usd"))
+
+
+def resolve_max_daily_loss_usd(
+    portfolio: Mapping[str, Any] | None = None,
+) -> float | None:
+    """Resolve an explicit max_daily_loss_usd; omit the axis when unset.
+
+    Priority: account_new_risk_snapshot / portfolio key → RUNTIME_TARGET_JSON →
+    SCHWAB_MAX_DAILY_LOSS_USD / MAX_DAILY_LOSS_USD. No approved production default.
+    """
+    if portfolio is not None:
+        projection = _mapping_or_empty(portfolio.get("account_new_risk_snapshot"))
+        for source in (projection, portfolio):
+            if "max_daily_loss_usd" in source:
+                return _positive_limit_or_none(source.get("max_daily_loss_usd"))
+    policy_limit = _max_daily_loss_from_runtime_target_json()
+    if policy_limit is not None:
+        return policy_limit
+    for key in _MAX_DAILY_LOSS_ENV_KEYS:
+        raw = os.environ.get(key)
+        if raw is None or not str(raw).strip():
+            continue
+        limit = _positive_limit_or_none(raw)
+        if limit is not None:
+            return limit
+    return None
+
+
+def runtime_risk_limits_for_daily_loss_axis(
+    max_daily_loss_usd: float | None,
+) -> RuntimeRiskLimits | None:
+    """Build admission-only limits carrying ``max_daily_loss_usd``, or omit.
+
+    SPY/1.0 caps are a minimal legal RuntimeRiskLimits carrier for the gate only —
+    not a production RRL binding and not an exposure raise.
+    """
+    if max_daily_loss_usd is None:
+        return None
+    symbol = _DAILY_LOSS_LIMIT_CARRIER_SYMBOL
+    return RuntimeRiskLimits(
+        allowed_symbols=(symbol,),
+        product_leverage_factors={symbol: 1},
+        nominal_caps={symbol: 1.0},
+        total_nominal_exposure_cap=1.0,
+        total_effective_exposure_cap=1.0,
+        max_positions=1,
+        max_daily_loss_usd=max_daily_loss_usd,
+    )
+
+
 def build_snapshot_from_portfolio(
     portfolio: Mapping[str, Any],
     *,
@@ -235,6 +326,7 @@ def build_snapshot_from_portfolio(
         if "realized_vol" in projection
         else _coerce_optional_float(portfolio.get("realized_vol")),
         production_drift_status=_resolve_production_drift_status(portfolio, projection),
+        daily_loss_usd=_resolve_explicit_daily_loss_usd(projection, portfolio, execution),
     )
 
 
@@ -245,7 +337,8 @@ def evaluate_portfolio_new_risk_admission(
 ) -> NewRiskAdmissionResult:
     try:
         snapshot = build_snapshot_from_portfolio(portfolio, execution=execution)
-        return evaluate_new_risk_admission(snapshot)
+        limits = runtime_risk_limits_for_daily_loss_axis(resolve_max_daily_loss_usd(portfolio))
+        return evaluate_new_risk_admission(snapshot, limits)
     except AccountNewRiskGateError:
         return NewRiskAdmissionResult(
             disposition=NewRiskDisposition.NEW_RISK_PROHIBITED,
@@ -291,7 +384,8 @@ def evaluate_cycle_new_risk_admission() -> NewRiskAdmissionResult:
             reason_codes=("EQUITY_UNKNOWN_FAIL_CLOSED",),
         )
     try:
-        return evaluate_new_risk_admission(_cycle_snapshot)
+        limits = runtime_risk_limits_for_daily_loss_axis(resolve_max_daily_loss_usd())
+        return evaluate_new_risk_admission(_cycle_snapshot, limits)
     except AccountNewRiskGateError:
         return NewRiskAdmissionResult(
             disposition=NewRiskDisposition.NEW_RISK_PROHIBITED,
diff --git a/pyproject.toml b/pyproject.toml
index 1878bd4..d4a8337 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -19,7 +19,7 @@ dependencies = [
     "google-cloud-storage",
     "google-auth",
     "numpy",
-    "quant-platform-kit @ git+https://github.com/QuantStrategyLab/QuantPlatformKit.git@a90937621a7a05c9f72d0ca8a29be3fcb18a327c",
+    "quant-platform-kit @ git+https://github.com/QuantStrategyLab/QuantPlatformKit.git@1826204e2927f4812a69348dd9c3d5235265be88",
     "us-equity-strategies @ git+https://github.com/QuantStrategyLab/UsEquityStrategies.git@4a3943883cd6b5bbfe32a559e56a91b40a81b7ce",
 ]
 
@@ -61,5 +61,5 @@ include = [
 
 [tool.uv]
 override-dependencies = [
-  "quant-platform-kit @ git+https://github.com/QuantStrategyLab/QuantPlatformKit.git@a90937621a7a05c9f72d0ca8a29be3fcb18a327c",
+  "quant-platform-kit @ git+https://github.com/QuantStrategyLab/QuantPlatformKit.git@1826204e2927f4812a69348dd9c3d5235265be88",
 ]
diff --git a/qsl.toml b/qsl.toml
index 15c2d27..5cf67dd 100644
--- a/qsl.toml
+++ b/qsl.toml
@@ -5,7 +5,7 @@ upgrade_ring = "ring_d"
 allow_legacy = false
 
 [qsl.requires]
-quant_platform_kit = "a90937621a7a05c9f72d0ca8a29be3fcb18a327c"
+quant_platform_kit = "1826204e2927f4812a69348dd9c3d5235265be88"
 us_equity_strategies = "4a3943883cd6b5bbfe32a559e56a91b40a81b7ce"
 
 [qsl.compat]
diff --git a/strategy_runtime.py b/strategy_runtime.py
index 35b9bdf..40a4b99 100644
--- a/strategy_runtime.py
+++ b/strategy_runtime.py
@@ -243,7 +243,7 @@ def _build_runtime_risk_capabilities(
             "max_positions",
             "exit_parameters",
         }
-        optional_policy_keys = {"small_account_hold"}
+        optional_policy_keys = {"small_account_hold", "max_daily_loss_usd"}
         policy_keys = set(policy)
         if (
             not expected_policy_keys.issubset(policy_keys)
@@ -340,6 +340,9 @@ def _build_runtime_risk_capabilities(
             )
             return {**capabilities, "runtime_risk_limits": object()}, "unavailable:runtime_binding_mismatch"
         try:
+            daily_loss_kwargs: dict[str, Any] = {}
+            if "max_daily_loss_usd" in policy:
+                daily_loss_kwargs["max_daily_loss_usd"] = policy.get("max_daily_loss_usd")
             limits = RuntimeRiskLimits(
                 allowed_symbols=tuple(policy["allowed_symbols"]),
                 product_leverage_factors=policy["product_leverage_factors"],
@@ -347,6 +350,7 @@ def _build_runtime_risk_capabilities(
                 total_nominal_exposure_cap=policy["total_nominal_exposure_cap"],
                 total_effective_exposure_cap=policy["total_effective_exposure_cap"],
                 max_positions=policy["max_positions"],
+                **daily_loss_kwargs,
             )
         except (TypeError, ValueError):
             return {**capabilities, "runtime_risk_limits": object()}, "unavailable:invalid_runtime_risk_limits"
diff --git a/tests/test_account_new_risk_gate.py b/tests/test_account_new_risk_gate.py
index c506f9f..4cf1d06 100644
--- a/tests/test_account_new_risk_gate.py
+++ b/tests/test_account_new_risk_gate.py
@@ -41,6 +41,9 @@ class AccountNewRiskGateSupportTests(unittest.TestCase):
     def tearDown(self) -> None:
         set_cycle_snapshot(None)
         os.environ.pop(ACCOUNT_NEW_RISK_GATE_ENV, None)
+        os.environ.pop("SCHWAB_MAX_DAILY_LOSS_USD", None)
+        os.environ.pop("MAX_DAILY_LOSS_USD", None)
+        os.environ.pop("RUNTIME_TARGET_JSON", None)
 
     def test_missing_equity_prohibits_fail_closed(self) -> None:
         portfolio = {"market_values": {"SOXL": 0.0}, "liquid_cash": 100.0}
@@ -121,6 +124,56 @@ def test_snapshot_maps_total_equity_from_portfolio(self) -> None:
         snapshot = build_snapshot_from_portfolio({"total_equity": 12_345.0})
         self.assertEqual(snapshot.equity_usd, 12_345.0)
 
+    def test_explicit_daily_loss_at_limit_prohibits_buy(self) -> None:
+        portfolio = {
+            "total_equity": 50_000.0,
+            "metadata": {"total_equity_source": "broker_liquidation_value"},
+            "account_new_risk_snapshot": {
+                "daily_loss_usd": 100.0,
+                "max_daily_loss_usd": 100.0,
+            },
+        }
+        with patch(
+            "application.account_new_risk_gate_support.resolve_production_drift_status_from_store",
+            return_value=None,
+        ):
+            snapshot = build_snapshot_from_portfolio(portfolio)
+            result = evaluate_portfolio_new_risk_admission(portfolio)
+        self.assertEqual(snapshot.daily_loss_usd, 100.0)
+        self.assertEqual(result.disposition, NewRiskDisposition.NEW_RISK_PROHIBITED)
+        self.assertIn("DAILY_LOSS_LIMIT_EXCEEDED", result.reason_codes)
+        self.assertTrue(new_risk_buy_prohibited(result))
+
+    def test_unconfigured_daily_loss_limit_omits_axis(self) -> None:
+        portfolio = {
+            "total_equity": 50_000.0,
+            "metadata": {"total_equity_source": "broker_liquidation_value"},
+            # daily_loss fact absent / invalid must not invent a prohibit when
+            # no max_daily_loss_usd is configured.
+            "account_new_risk_snapshot": {"daily_loss_usd": float("nan")},
+        }
+        with patch(
+            "application.account_new_risk_gate_support.resolve_production_drift_status_from_store",
+            return_value=None,
+        ):
+            result = evaluate_portfolio_new_risk_admission(portfolio)
+        self.assertEqual(result.disposition, NewRiskDisposition.ALLOW_NEW_RISK)
+        self.assertNotIn("DAILY_LOSS_UNKNOWN_FAIL_CLOSED", result.reason_codes)
+        self.assertNotIn("DAILY_LOSS_LIMIT_EXCEEDED", result.reason_codes)
+
+    def test_configured_limit_without_daily_loss_fact_fails_closed(self) -> None:
+        portfolio = {
+            "total_equity": 50_000.0,
+            "metadata": {"total_equity_source": "broker_liquidation_value"},
+            "account_new_risk_snapshot": {"max_daily_loss_usd": 100.0},
+        }
+        with patch(
+            "application.account_new_risk_gate_support.resolve_production_drift_status_from_store",
+            return_value=None,
+        ):
+            result = evaluate_portfolio_new_risk_admission(portfolio)
+        self.assertEqual(result.disposition, NewRiskDisposition.NEW_RISK_PROHIBITED)
+        self.assertIn("DAILY_LOSS_UNKNOWN_FAIL_CLOSED", result.reason_codes)
 
     def test_snapshot_maps_production_drift_status_from_account_new_risk_snapshot(self) -> None:
         snapshot = build_snapshot_from_portfolio(
diff --git a/uv.lock b/uv.lock
index 3f81574..218e818 100644
--- a/uv.lock
+++ b/uv.lock
@@ -17,7 +17,7 @@ resolution-markers = [
 ]
 
 [manifest]
-overrides = [{ name = "quant-platform-kit", git = "https://github.com/QuantStrategyLab/QuantPlatformKit.git?rev=a90937621a7a05c9f72d0ca8a29be3fcb18a327c" }]
+overrides = [{ name = "quant-platform-kit", git = "https://github.com/QuantStrategyLab/QuantPlatformKit.git?rev=1826204e2927f4812a69348dd9c3d5235265be88" }]
 
 [[package]]
 name = "anyio"
@@ -186,7 +186,7 @@ requires-dist = [
     { name = "pytest", marker = "extra == 'test'" },
     { name = "pytest-cov", marker = "extra == 'test'" },
     { name = "pytz" },
-    { name = "quant-platform-kit", git = "https://github.com/QuantStrategyLab/QuantPlatformKit.git?rev=a90937621a7a05c9f72d0ca8a29be3fcb18a327c" },
+    { name = "quant-platform-kit", git = "https://github.com/QuantStrategyLab/QuantPlatformKit.git?rev=1826204e2927f4812a69348dd9c3d5235265be88" },
     { name = "requests" },
     { name = "ruff", marker = "extra == 'test'" },
     { name = "schwab-py" },
@@ -1320,7 +1320,7 @@ wheels = [
 [[package]]
 name = "quant-platform-kit"
 version = "1.0.0"
-source = { git = "https://github.com/QuantStrategyLab/QuantPlatformKit.git?rev=a90937621a7a05c9f72d0ca8a29be3fcb18a327c#a90937621a7a05c9f72d0ca8a29be3fcb18a327c" }
+source = { git = "https://github.com/QuantStrategyLab/QuantPlatformKit.git?rev=1826204e2927f4812a69348dd9c3d5235265be88#1826204e2927f4812a69348dd9c3d5235265be88" }
 
 [[package]]
 name = "requests"