heb-diac-plane-2.0: index entry + card + golden

cards/heb-diac-plane-2.0.md

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+# heb-diac-plane-2.0
+
+Hebrew nikud diacritization, plane-factorized (run-022): ByT5-**base**
+encoder + per-character nikud-class head, K=3 mask-predict decode,
+int8 (dynamic QInt8) ONNX, 416 MB. Trained on hebrew-v4 (nakdimon +
+sefaria + distilled + expanded) on HF Jobs.
+
+## Metrics (runtime protocol)
+
+| benchmark | value |
+|---|---|
+| nakdimon test DER (greedy, int8, py runtime) | **8.18** (1.0: 12.48) |
+| phonikud heb-g2p-benchmark CER / no-stress (via nikud_ipa rules) | 0.2393 / 0.1389 |
+
+## Features
+
+- `translate(text, preserve_diacritics=True)` — user-supplied nikud is
+  pinned inside the decode and round-trips byte-exactly (leading marks
+  included).
+- Language-generic plane contract (`kind: plane`); same runtime as the
+  Arabic plane family.
+- nikud→IPA composition: `interscript.ml.nikud_ipa.plane_to_ipa`.
+
+## Provenance
+
+- Training: TODO.sota/04 (run-022, HF Jobs a100-large); corpus
+  `Interscript/hebrew-v4` (private); recipe mirrors run-021 at
+  byt5-base/4ep/K=3.
+- Artifact sha256: `9c8f0432294ebae6abc847ddb79572c1ab979f4851f03d44a9bb6495ba767a9e`.
+- License: BSD-3-Clause (code + weights).