diff --git a/crates/ml-alpha/cuda/rl_q_pi_distill_grad.cu b/crates/ml-alpha/cuda/rl_q_pi_distill_grad.cu
index 32cc8e812..55ad7b004 100644
--- a/crates/ml-alpha/cuda/rl_q_pi_distill_grad.cu
+++ b/crates/ml-alpha/cuda/rl_q_pi_distill_grad.cu
@@ -39,8 +39,10 @@
 #define RL_Q_DISTILL_LAMBDA_INDEX            486
 #define RL_Q_DISTILL_TEMPERATURE_INDEX       487
 #define RL_Q_DISTILL_KL_EMA_INDEX            488
-
-#define KL_EMA_ALPHA                         0.05f
+// audit-isv 2026-05-24: KL_EMA_ALPHA was hardcoded 0.05f — caught
+// by scripts/audit-isv.sh on the first manifest-driven dogfood
+// run. ISV-resident now per SP20 §0.1.
+#define RL_Q_DISTILL_KL_EMA_ALPHA_INDEX      493
 
 extern "C" __global__ void rl_q_pi_distill_grad(
     const float* __restrict__ q_logits,        // [B × N_ACTIONS × Q_N_ATOMS]
@@ -167,8 +169,9 @@ extern "C" __global__ void rl_q_pi_distill_grad(
 
     if (b == 0 && a == 0) {
         const float kl_prev = isv[RL_Q_DISTILL_KL_EMA_INDEX];
+        const float alpha   = isv[RL_Q_DISTILL_KL_EMA_ALPHA_INDEX];
         const float kl_new  = (kl_prev == 0.0f) ? s_kl
-            : (1.0f - KL_EMA_ALPHA) * kl_prev + KL_EMA_ALPHA * s_kl;
+            : (1.0f - alpha) * kl_prev + alpha * s_kl;
         isv[RL_Q_DISTILL_KL_EMA_INDEX] = kl_new;
     }
 }
diff --git a/crates/ml-alpha/src/rl/isv_slots.rs b/crates/ml-alpha/src/rl/isv_slots.rs
index 56e7520bf..00a6942d9 100644
--- a/crates/ml-alpha/src/rl/isv_slots.rs
+++ b/crates/ml-alpha/src/rl/isv_slots.rs
@@ -45,7 +45,9 @@
 //! | 489-490     | 2 negative-tail tracking slots (raw + EMA) for adaptive RATIO | apply_reward_scale + rl_reward_clamp_controller |
 //! | 491-492     | 2 controller-anchor slots (KL distill target + reward_scale MIN) | rl_isv_write (seed) + adaptive controllers |
 //!
-//! Total: 93 slots; `RL_SLOTS_END = 493`.
+//! | 493         | Q→π distill KL_EMA blend alpha                          | rl_isv_write (seed) + rl_q_pi_distill_grad |
+//!
+//! Total: 94 slots; `RL_SLOTS_END = 494`.
 
 /// Discount factor γ. Controller input: mean trade duration / anchor.
 /// Bootstrap 0.99.
@@ -724,6 +726,13 @@ pub const RL_Q_DISTILL_KL_TARGET_INDEX: usize = 491;
 /// Seeded by `rl_isv_write`.
 pub const RL_REWARD_SCALE_MIN_INDEX: usize = 492;
 
+/// Q→π distill KL_EMA blend α — was hardcoded `0.05f` in
+/// `rl_q_pi_distill_grad.cu`. Caught by `scripts/audit-isv.sh` on
+/// the first manifest-driven dogfood run pre-SP20. Per SP20 §0.1
+/// every numerical constant in new (and existing, when discovered)
+/// kernels is ISV-resident. Seeded 0.05 (preserves prior behavior).
+pub const RL_Q_DISTILL_KL_EMA_ALPHA_INDEX: usize = 493;
+
 /// Last RL-allocated slot index (exclusive). The integrated trainer
 /// extends `ISV_TOTAL_DIM` to at least this value at trainer init time.
-pub const RL_SLOTS_END: usize = 493;
+pub const RL_SLOTS_END: usize = 494;
diff --git a/crates/ml-alpha/src/trainer/integrated.rs b/crates/ml-alpha/src/trainer/integrated.rs
index d7a5e9935..28be1c903 100644
--- a/crates/ml-alpha/src/trainer/integrated.rs
+++ b/crates/ml-alpha/src/trainer/integrated.rs
@@ -1251,7 +1251,7 @@ impl IntegratedTrainer {
         // (slot, value) pair — pure device write, no HtoD per
         // `feedback_no_htod_htoh_only_mapped_pinned`.
         {
-            let isv_constants: [(usize, f32); 35] = [
+            let isv_constants: [(usize, f32); 36] = [
                 // Static seeds for the adaptive reward-clamp controller —
                 // these are the initial values that
                 // `rl_reward_clamp_controller` will replace once it
@@ -1283,6 +1283,9 @@ impl IntegratedTrainer {
                 // one more order of magnitude before pegging when
                 // mean_abs_pnl spikes.
                 (crate::rl::isv_slots::RL_REWARD_SCALE_MIN_INDEX,         1e-4),
+                // Q→π distill KL_EMA blend α (was hardcoded 0.05f in
+                // rl_q_pi_distill_grad.cu, caught by audit-isv.sh dogfood).
+                (crate::rl::isv_slots::RL_Q_DISTILL_KL_EMA_ALPHA_INDEX,   0.05),
                 (crate::rl::isv_slots::RL_KL_TARGET_INDEX,              0.01),
                 (crate::rl::isv_slots::RL_IMPROVEMENT_THRESHOLD_INDEX,  0.99),
                 (crate::rl::isv_slots::RL_PLATEAU_PATIENCE_INDEX,    1000.0),