heb-diac-plane-1.0

Part of the Secryst phonological-layer family — a dedicated model for diacritization (HE), distributed as a Secryst IMF artifact and loadable through any Secryst crystal:

from secryst import Model
Model.load("heb-diac-plane-1.0")

• Artifact: heb-diac-plane-1.0.zip (0.20 GiB)

Measured quality

Full evaluation sets, zero skipped examples, the benchmark's own evaluator. Provenance for every number is the results record of the training project.

metric	value	provenance
der_total_greedy	12.48	interscript/interscript-models docs/RESULTS.md#run-021-heb-plane--1248-nakdimon-der-the-plane-family-generalizes-seq2seq-student-beaten-at-396pp-2026-10-07

Benchmark

Nakdimon test set, greedy decode, seq2seq_der — the exact protocol of the shipped seq2seq student:

model	Total DER	notes
heb-diac-plane-1.0 (this model)	12.48%	219 MB int8
heb-diac-1.1 (seq2seq student)	16.44%	larger artifact
DictaBERT (fine-tuned BERT baseline)	~35.6%	per-protocol reference

−3.96pp (24% relative error reduction) over the shipped student at the plane's on-device economics. Median per-example DER 9.8%; 223,872 scored positions.

Architecture

Plane-factorized nikud restoration: a ByT5-small-class byte-level encoder (no decoder) with a nikud-plane embedding and one classification head per character position over 135 order-preserving nikud classes. Decoding is K=2 mask-predict passes — fully parallel forwards with the predicted plane fed back; no KV cache, no autoregressive loop. Skeleton round-trip is byte-exact; nikud cluster order is preserved as written (the corpus has no uniform canon).

The artifact is a single self-contained int8 ONNX graph in the plane zip contract (metadata.yaml with member sha256s + plane.onnx + classes.json), loadable by interscript[ml] PlaneModel.from_zip. The canonical distribution is the sha256-verified release artifact; this repository mirrors those exact bytes.

Provenance: interscript-train run-021 — v4 combined corpus (nakdimon + sefaria + distilled v1/v2 + expanded_v2), 50,303 units, 2 epochs. The verdict ledger records a disclosed harness correction (window-stitching bug; first read 32.64%, corrected 12.48%).

License

BSD-3-CLAUSE

Provenance

Trained in the Secryst training monorepo and published through the interscript-ml distribution contract (models.yaml index, sha256-verified release assets, parity-gated artifacts). The canonical download channel is GitHub Releases; this repository is the Hugging Face mirror of the same bytes, pinned to the index revision.