diff --git a/crates/ml/src/cuda_pipeline/sp14_isv_slots.rs b/crates/ml/src/cuda_pipeline/sp14_isv_slots.rs
index 980a7461b..cc523f8bc 100644
--- a/crates/ml/src/cuda_pipeline/sp14_isv_slots.rs
+++ b/crates/ml/src/cuda_pipeline/sp14_isv_slots.rs
@@ -97,15 +97,7 @@ pub const AUX_PRED_HORIZON_BARS_INDEX:    usize = 450;
 pub const AVG_WIN_HOLD_TIME_BARS_INDEX:   usize = 451;
 
 // ── Aux horizon producer constants ────────────────────────────────────
-// SP22 H1 (2026-05-12) — bumped sentinel from 60 → 200. The adaptive
-// `aux_horizon_update_kernel` was collapsing H back to ~1.7 (the
-// observed avg winning hold time) because positions don't last long
-// in our volume-bar setup. Result: aux head predicts 2-bar-ahead
-// sign which is HFT microstructure noise, and aux_dir_acc pins at
-// 28-47% (BELOW RANDOM!) across all cycles in v9/v10. To test H1,
-// we force H=200 (≈156s @ volume bars) and disable the adaptive
-// update so the label stays at a learnable horizon.
-pub const SENTINEL_AUX_PRED_HORIZON_BARS:    f32 = 200.0;  // SP22 H1 fixed horizon
+pub const SENTINEL_AUX_PRED_HORIZON_BARS:    f32 = 60.0;  // Pearl-A bootstrap
 pub const SENTINEL_AVG_WIN_HOLD_TIME_BARS:   f32 = 0.0;   // Pearl-A bootstrap
 pub const AUX_PRED_HORIZON_BARS_MIN:         f32 = 1.0;   // floor (cannot predict past)
 pub const AUX_PRED_HORIZON_BARS_MAX:         f32 = 240.0; // ceiling (rollout buffer guard)
diff --git a/crates/ml/src/trainers/dqn/trainer/training_loop.rs b/crates/ml/src/trainers/dqn/trainer/training_loop.rs
index 5839ede3d..365f87132 100644
--- a/crates/ml/src/trainers/dqn/trainer/training_loop.rs
+++ b/crates/ml/src/trainers/dqn/trainer/training_loop.rs
@@ -457,18 +457,13 @@ impl DQNTrainer {
                 let hold_at_exit_ptr      = collector.hold_at_exit_per_sample_dev_ptr();
                 let trade_profitable_ptr  = collector.trade_profitable_per_sample_dev_ptr();
                 let total_samples = (collector.alloc_episodes() * collector.alloc_timesteps()) as i32;
-                // SP22 H1 (2026-05-12) — adaptive horizon update DISABLED.
-                // The producer was collapsing H back to ~1.7 bars (avg winning
-                // hold time on volume bars), making the aux label "predict
-                // ~2-bar-ahead sign" = HFT noise. v9/v10 aux_dir_acc pinned
-                // at 28-47% (BELOW RANDOM) across all cycles. SP22 H1 test:
-                // force H = SENTINEL_AUX_PRED_HORIZON_BARS = 200 throughout
-                // training. If aux_dir_acc rises above 50%, longer-horizon
-                // labels are learnable; if it stays below, the aux head
-                // architecture itself can't learn directional signal at any
-                // horizon (escalates to SP22 H2/H4).
-                let _ = (hold_at_exit_ptr, trade_profitable_ptr);
-                // Note: total_samples used by launch_reward_cap_update below.
+                if let Err(e) = fused.trainer().launch_aux_horizon_chain(
+                    hold_at_exit_ptr,
+                    trade_profitable_ptr,
+                    total_samples,
+                ) {
+                    tracing::warn!(epoch, "launch_aux_horizon_chain failed (non-fatal): {e}");
+                }
                 // Class A P0-A (2026-05-08): adaptive REWARD_POS/NEG_CAP
                 // — per-epoch boundary launch. Sweeps the per-sample
                 // `step_ret_per_sample` + `trade_close_per_sample` buffers
diff --git a/docs/dqn-wire-up-audit.md b/docs/dqn-wire-up-audit.md
index 0f8962c30..ee4a03442 100644
--- a/docs/dqn-wire-up-audit.md
+++ b/docs/dqn-wire-up-audit.md
@@ -16210,48 +16210,3 @@ configuration. New SP arc needed:
 - **Validation method**: each hypothesis gets its own atomic smoke
   with one variable changed; compare against v9 baseline (174 peak val,
   WR=50.1%).
-
-## 2026-05-12 — SP22 H1 experiment: pin aux horizon at 200 bars
-
-### Hypothesis
-
-`aux_dir_acc` pins at 28-47% (BELOW RANDOM) across v9/v10 cycles
-because the adaptive `aux_horizon_update_kernel` collapses
-ISV[AUX_PRED_HORIZON_BARS_INDEX=450] back to ~1.7 bars (the observed
-`avg_winning_hold_time`). The aux head label becomes
-`(p[bar+2] > p[bar])` — HFT-scale microstructure noise. With unlearnable
-labels, the supervised aux supervision can't teach directional features
-to the trunk → the WR=50% plateau in v5-v9.
-
-### Experiment scope
-
-1. Bump `SENTINEL_AUX_PRED_HORIZON_BARS` from 60.0 → 200.0
-   (~156s @ volume bars at 0.78s/bar — multi-bar context window).
-2. Disable `launch_aux_horizon_chain` call so H stays pinned at the
-   sentinel throughout training.
-
-### Predicted outcomes
-
-- H1 CONFIRMED if `aux_dir_acc` rises above 50% at H=200. Fix: replace
-  adaptive H with a fixed long horizon, or change H's driver from
-  avg_win_hold_time to something less collapsible.
-- H1 FALSIFIED if `aux_dir_acc` stays ≤50% at H=200. Aux head can't
-  learn direction at any horizon — escalate to SP22 H2 (action-space
-  pathology) or H4 (feature representation gap).
-
-### Files changed
-
-- `crates/ml/src/cuda_pipeline/sp14_isv_slots.rs`:
-    `SENTINEL_AUX_PRED_HORIZON_BARS: 60.0 → 200.0`
-- `crates/ml/src/trainers/dqn/trainer/training_loop.rs`:
-    `launch_aux_horizon_chain` call DISABLED (preserves sentinel).
-
-### Cost + kill criteria
-
-1 smoke, ~30 min wall-clock. Kill at cycle 2 if `aux_dir_acc` trend
-is clear (per `feedback_kill_runs_on_anomaly_quickly`).
-
-### Reverts
-
-If H1 falsified → revert both files, proceed to H2/H3/H4 per the SP22
-plan at `docs/plans/2026-05-12-sp22-wr-plateau-investigation.md`.