diff --git a/crates/ml-alpha/cuda/rl_confidence_gate.cu b/crates/ml-alpha/cuda/rl_confidence_gate.cu
index 6a2562e03..b8862c596 100644
--- a/crates/ml-alpha/cuda/rl_confidence_gate.cu
+++ b/crates/ml-alpha/cuda/rl_confidence_gate.cu
@@ -34,6 +34,15 @@
 #define RL_HOLD_TARGET_FRAC_INDEX      575
 #define RL_HOLD_FRAC_EMA_INDEX         576
 #define RL_CONF_GATE_MAX_HOLD_FRAC_INDEX 584
+// Phase 7b F5 (2026-06-05) Option A — interop with state-conditional
+// action availability mask. When F5 master gate (slot 823) is engaged
+// AND position is flat, F5 has DELIBERATELY forced the agent into an
+// opening action by masking Hold (and other invalid actions) in
+// pi_logits. Overriding that back to Hold here neutralizes F5's
+// surfer→trend choice-set forcing and prevents F5-G1 from achieving
+// `hold_frac_flat == 0`. The suppression is gated on F5-engaged AND
+// flat — in-position safety overrides are preserved verbatim.
+#define RL_F5_STATE_MASK_ENABLED_INDEX 823
 #define THRESHOLD_MIN                  0.05f
 #define THRESHOLD_MAX                  0.95f
 #define HOLD_EMA_ALPHA                 0.1f
@@ -118,7 +127,14 @@ extern "C" __global__ void rl_confidence_gate(
     const float lcb = (mu - v_min) - lambda * sigma;
     const float conf = fmaxf(0.0f, fminf(lcb / span, 1.0f));
 
-    if (conf < threshold) {
+    // Phase 7b F5 (2026-06-05) Option A — suppress Hold override when
+    // F5 is engaged and we are flat. F5 has masked Hold (and other
+    // invalid actions) in pi_logits, so the sampled action is a
+    // deliberate F5-allowed opening. The early-return at line above
+    // (`position_lots != 0 → return`) already restricts us to flat
+    // here, so checking only the F5 master gate is sufficient.
+    const bool f5_engaged = (isv[RL_F5_STATE_MASK_ENABLED_INDEX] > 0.5f);
+    if (conf < threshold && !f5_engaged) {
         actions[b] = ACTION_HOLD;
         isv[RL_CONF_GATE_FIRED_COUNT_INDEX] += 1.0f;
     }
diff --git a/crates/ml-alpha/cuda/rl_frd_gate.cu b/crates/ml-alpha/cuda/rl_frd_gate.cu
index bb18c8b3e..a7d378cdc 100644
--- a/crates/ml-alpha/cuda/rl_frd_gate.cu
+++ b/crates/ml-alpha/cuda/rl_frd_gate.cu
@@ -35,6 +35,15 @@
 #define RL_FRD_GATE_FIRED_COUNT_INDEX  518
 #define RL_GATE_WARMUP_STEPS_INDEX    524
 #define RL_STEP_COUNTER_ISV_INDEX     548
+// Phase 7b F5 (2026-06-05) Option A — interop with state-conditional
+// action availability mask. When F5 master gate (slot 823) is engaged
+// AND position is flat, F5 has DELIBERATELY forced the agent into an
+// opening action by masking Hold (and other invalid actions) in
+// pi_logits. Overriding that back to Hold here neutralizes F5's
+// surfer→trend choice-set forcing and prevents F5-G1 from achieving
+// `hold_frac_flat == 0`. The suppression is gated on F5-engaged AND
+// flat — in-position safety overrides are preserved verbatim.
+#define RL_F5_STATE_MASK_ENABLED_INDEX 823
 
 extern "C" __global__ void rl_frd_gate(
     int*                 __restrict__ actions,      // [B] IN/OUT
@@ -60,6 +69,15 @@ extern "C" __global__ void rl_frd_gate(
     const int position_lots = *(const int*)(pos_state + b * pos_bytes);
     if (position_lots != 0) return;
 
+    // Phase 7b F5 (2026-06-05) Option A — short-circuit before quality
+    // computation when F5 is engaged and we are flat. F5 has masked
+    // Hold in pi_logits so the sampled opening is deliberate; overriding
+    // here would neutralize F5-G1 (`hold_frac_flat == 0` from flat).
+    // The early `position_lots != 0 → return` above already restricts
+    // us to flat, so checking the F5 master gate alone is sufficient.
+    const bool f5_engaged = (isv[RL_F5_STATE_MASK_ENABLED_INDEX] > 0.5f);
+    if (f5_engaged) return;
+
     // Horizon 2 logits for this batch.
     const float* h2 = frd_logits + b * (FRD_N_HORIZONS * FRD_N_ATOMS) + FRD_H2_OFFSET;