docs(verdicts): run-018 plane v2 clears the rung gate - 3.5905, new on-device frontier (size -45%, latency -67%)

Author: Ronald Tse

TODO.sota-2026/04-stoicheia-diffusion-wo.md

@@ -1,6 +1,6 @@
 # 04 — WO (queued, unscheduled): plane-factorized char-level masked diffusion
 
-Status: ENTERED (2026-10-03, owner: "make it work - ultimately the best SOTA") — in build
+Status: RUNG GATE CLEARED (2026-10-04) — teacher-tier phase in flight
 
 ## Entry design decision (2026-10-03)
 
@@ -70,3 +70,22 @@ lacunae / re-segments / **accentuates** / punctuates. Beats Ithaca
 4. Entry criteria: (a) 01 (run-009) lands and re-ranks the teacher
    frontier; (b) owner authorizes a new architecture line; (c) a
    decode-parity design exists for non-AR models (IMF v2 question).
+
+
+## Results (measured)
+
+**run-017 (v1, 350k units, 1 epoch, K=4):** full-set Total DER
+4.7615 / Morph 3.0530 — 0.19pp off the 4.5701 rung. Grid (subset,
+labeled): quality monotonically improving 3.295→2.991→2.934 across
+checkpoints (UNDERtrained, not overfit); K flat 2/4/8.
+
+**run-018 (v2, 551k units uncapped, 2 epochs, K=2):** full-set
+**Total DER 3.5905 / Morph 2.2149** — the 4.5701 rung gate CLEARED by
+0.98pp (21% relative error reduction). ONNX int8 artifact: 219 MB
+(-45% vs the shipped 491 MB seq2seq int8static) and 1,145 ms/window
+on the same machine where the shipped artifact takes 3,459 ms (-67%).
+**The plane model is the new on-device frontier on all three axes.**
+Gap to the teacher tier (2.2864): 1.30pp.
+
+**Teacher-tier phase (run-019):** same recipe on the ByT5-LARGE
+encoder — the SOTA-dedicated gate (beat 2.2864) is the target.

docs/RESULTS.md

@@ -1025,3 +1025,24 @@ much as the knowledge. Paradigm-table aux is closed (no dose tuning,
 no convention-normalization retry recorded as future work; a lexical
 lever, if ever revisited, must be rendered into benchmark-convention
 running text). The frontier mover on record remains the r7 news mix.
+
+## run-018 plane v2 — the 4.5701 rung CLEARED: new on-device frontier on all axes (2026-10-04)
+
+The plane-factorized encoder (Stoicheia WO, TODO.sota-2026/04) at its
+second configuration clears the student rung decisively:
+
+| model | full-set DER | int8 size | CPU ms/window |
+|---|---|---|---|
+| ara-diac-small-2.1 (shipped) | 4.5701 | 491 MB | 3,459 |
+| **plane v2 (run-018, K=2)** | **3.5905** | **219 MB** | **1,145** |
+| r7 teacher | 2.2864 | — | — |
+
+−0.98pp DER (−21% relative), −45% size, −67% latency — all three
+on-device axes at once. v1→v2 came from the grid's evidence: uncapped
+corpus (551,431 units), 2 epochs, K=2 (K flat across 2/4/8; the
+parallel-refinement depth is not where quality lives — bidirectional
+conditioning is). Architecture: ByT5-small encoder + diacritic-plane
+embedding + per-position haraqat classification; Mask-Predict
+self-conditioning; one ONNX graph, host-side K-pass loop, no KV
+cache. Morph DER 2.2149. Teacher-tier phase (ByT5-large encoder,
+run-019) attacks the 2.2864 SOTA-dedicated gate next.