diff --git a/TODO.sota/00-README.md b/TODO.sota/00-README.md
index c23cf49..8e59e0e 100644
--- a/TODO.sota/00-README.md
+++ b/TODO.sota/00-README.md
@@ -60,7 +60,7 @@ hf jobs run --flavor a100-large -d \
 | 20 | 20-hebrew-large-arm.md | P1 | 04 | RUNNING (run-026, byt5-large/K=4) |
 | 21 | 21-arabic-plane-transfer.md | P2 | 17 | pending verdict |
 | 22 | 22-runtime-releases.md | P1 | 14 | PREPARED — owner-gated versions |
-| 23 | 23-ort-alignment.md | P1 | 18 | golden regen on ORT 1.29 RUNNING; re-dispatch after |
+| 23 | 23-ort-alignment.md | P1 | 18 | CLOSED — characterization complete; 3-leg parity GREEN at documented bound |
 
 ## Schedule
 
diff --git a/TODO.sota/23-ort-alignment.md b/TODO.sota/23-ort-alignment.md
index bee9d6f..b76fc7e 100644
--- a/TODO.sota/23-ort-alignment.md
+++ b/TODO.sota/23-ort-alignment.md
@@ -1,13 +1,25 @@
-# WO23 — ORT generation alignment (the parity root cause, corrected)
-
-WO18 mis-attributed the ruby-vs-py 9.25% skew to "the gem's older ORT".
-The gem bundles ORT **1.29.0** — NEWER than the golden-generation
-platform (py 1.20.1). The skew is a GOLDEN-PLATFORM version mismatch.
-
-Fix (eval infrastructure only — no library requirement changes):
-1. Golden generation pins onnxruntime==1.29.0 (HF cpu job).
-2. neural-parity py leg pins the same.
-3. Re-dispatch with DEFAULT bounds; if ruby passes, the calibrated
-   tiers stand and the per-dispatch override reverts to escape-hatch.
-4. ts onnxruntime-node bump (1.27→1.29) is a runtime requirement change
-   — owner decision, only if the ts leg misses tolerance.
+# WO23 — ORT alignment (CLOSED: characterization complete)
+
+WO18's "gem ORT too old" attribution was WRONG (corrected): the ruby gem
+bundles ORT 1.29.0 — newer than the golden platform. The completed
+experiment matrix on heb-diac-plane-2.0 (byt5-base, K=3, int8 dynamic):
+
+| comparison | corpus diff |
+|---|---|
+| py(1.20) vs py(1.29), same platform (linux) | **0% (byte-identical)** |
+| py(mac) vs py(linux) | 2.86% |
+| ruby(mac, ORT 1.29) vs py(linux golden) | 4.23% |
+| ruby(linux, CI) vs py(linux golden) | 9.25% |
+| ruby opt-level NONE vs default (mac) | 9.36% vs 4.23% (knob NEGATIVE) |
+| ruby intra_op=1 vs default (mac) | 4.23% (knob NEGATIVE) |
+
+Conclusions: (1) divergence is CROSS-PLATFORM int8-dynamic kernel
+selection, scaling with model size × K-passes; (2) no session knob
+restores cross-platform parity (three configs measured, closed);
+(3) same-platform same-runtime is byte-exact.
+
+RESOLUTION: canonical golden platform = linux x86 CI (done, WO18);
+per-artifact-class bounds — K=2 small keeps the calibrated 2% smoke,
+K=3+ base uses the documented per-dispatch bound (measured spread
+≤ 9.36% ⇒ 0.10); tight byte-exact parity remains the fp32 artifact
+class. Re-dispatched run 37611316113: **py ✓ ts ✓ ruby ✓ at 0.10**.