diff --git a/docs/dqn-wire-up-audit.md b/docs/dqn-wire-up-audit.md
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@@ -2,6 +2,44 @@
 
 **Status:** Populated during Plan 1 Task 6 (A.5 orphan audit). Updated on every commit per Invariant 7.
 
+## 2026-05-08 — SP17 Phase 3.3: Phase 3 close-out + memory pearl
+
+Phase 3.3 finalises the SP17 dueling-Q diagnostic chain:
+
+**Canonical HEALTH_DIAG line format** (per-epoch, alongside `v_a_means`):
+
+```
+HEALTH_DIAG[N]: dueling [v_share=(d=X m=Y o=Z u=W)] [a_var=(d=A m=B o=C u=D)] [clip=K]
+```
+
+The 9 ISV slots [474..483) are emitted in this single line, matching the plan's exact format spec at line 1064-1066. Reader parsing pattern:
+
+| Field | Slot | Meaning | Health interpretation |
+|---|---|---|---|
+| `v_share=(d= ...)` | 478..482 | Per-branch `\|E[V]\| / (\|E[V]\| + \|E[A_centered, picked]\|)` | ≈0.5 = healthy split; →1.0 with a_var→0 = pre-SP17 V-dominated regression |
+| `a_var=(d= ...)` | 474..478 | Per-branch `Var_a(A_centered)` over actions | >0 = policy discriminates; →0 = "all actions equivalent, V dominates" |
+| `clip=K` | 482 | Adaptive `p99(\|A_centered\|) × 1.5` | Settles in [0.5, 5.0] for healthy training; outside = degenerate distribution |
+
+**Phase 4 smoke gate** (Plan Phase 4): the L40S 5-epoch smoke checks
+- `a_var > 0.01` per branch throughout (regression detector)
+- `v_share ∈ [0.3, 0.7]` per branch (balanced dueling)
+- `clip ∈ [0.5, 5.0]` (magnitude scale healthy)
+
+**Memory pearl**: `pearl_sp4_histogram_warp_tile_undercount.md` documents the test-data trap discovered in Phase 3.2's GPU oracle test for `advantage_clip_bound`. The kernel uses non-atomic per-warp tile binning per `feedback_no_atomicadd`; the documented "1/(256×32) loss" qualifies "for uniformly distributed signals". Lockstep-uniform synthetic test data violates that assumption and undercounts dramatically. Fix: add per-element jitter to test data. Real `|A_centered|` in production is continuous so the issue is test-only.
+
+**Phase 3 commit chain** (atomic per Phase per `feedback_no_partial_refactor`):
+
+| Commit | Phase | Producer | LOC | Tests |
+|---|---|---|---|---|
+| `1e70cd5e5` | 3.1 | A_var_ema (4 branches) | +649 | 1 GPU oracle (Var matches closed-form) |
+| `b6b17d46b` | 3.2 | V_share + advantage_clip_bound | +1208 | 2 GPU oracles (V_share closed-form, p99 × safety) |
+
+All 13 SP17 GPU oracle tests pass on RTX 3050 Ti in 2.4s.
+
+**Atomicity envelope**: Phase 3 is observability-only. NO consumer path is modified — no kernel reads V_share, a_var, or clip_bound to alter behaviour. The clip bound is producer-tracked but NOT yet wired as an actual clip on any kernel; that's Phase 5 follow-up. The Phase 1 mean-zero contract (commits `eabcf8d52` through `6f53d676f`) is what makes `A_centered` a meaningful signal; this Phase observes it.
+
+**Plan**: `docs/superpowers/plans/2026-05-08-sp17-dueling-q-network.md` Phase 3.
+
 ## 2026-05-08 — SP17 Phase 3.2: V_share + advantage_clip_bound producers (additive observability)
 
 Phase 3.2 lands the remaining two SP17 dueling-Q diagnostic producers atomically with kernel + launcher + Rust wrapper + extended HEALTH_DIAG emit + GPU oracle tests per `feedback_wire_everything_up`.