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model : add Tencent Hy 4 (hy_v4) preview architecture support (#28127)

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* model: add Tencent Hy 4 (hy_v4) preview architecture support

Adds support for the Tencent Hy 4 model (Hugging Face architecture
HYV4ForCausalLM, GGUF arch hy_v4):

Add HF -> GGUF conversion script (conversion/hy_v4.py) and wire it into the conversion registry
Register hy_v4 GGUF constants, arch enum, and writer support
Implement the hy-v4 model graph, hparams, vocab and context changes
Register the new arch in llama-arch and models registry
Extend arch tests to cover hy_v4

Assisted by Claude Opus 5

* Update convert_hf_to_gguf_update.py

Co-authored-by: fairydreaming <166155368+fairydreaming@users.noreply.github.com>

* Update conversion/base.py

Co-authored-by: fairydreaming <166155368+fairydreaming@users.noreply.github.com>

* convert : move hy_v4 entry to the same place as in convert_hf_to_gguf_update.py

* model : apply changes related to n_ff_exp becoming per-layer in Hy4-preview

* n_layer_all

---------

Co-authored-by: fairydreaming <166155368+fairydreaming@users.noreply.github.com>
Co-authored-by: Stanisław Szymczyk <sszymczy@gmail.com>
Co-authored-by: Sigbjørn Skjæret <sigbjorn.skjaeret@huggingface.co>
This commit is contained in:
HongHuang
2026-09-04 14:31:36 +02:00
committed by GitHub
co-authored by fairydreaming Stanisław Szymczyk Sigbjørn Skjæret
parent 5266f24da7
commit 49c0dc82b8
18 changed files with 1124 additions and 6 deletions
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gguf-py/gguf/gguf_writer.py
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@@ -1055,6 +1055,9 @@ class GGUFWriter:
def add_hyper_connection_epsilon(self, value: float) -> None:
self.add_float32(Keys.HyperConnection.EPSILON.format(arch=self.arch), value)
def add_hyper_connection_magnitude(self, value: float) -> None:
self.add_float32(Keys.HyperConnection.MAGNITUDE.format(arch=self.arch), value)
def add_hyper_connection_low_rank(self, value: int) -> None:
self.add_uint32(Keys.HyperConnection.LOW_RANK.format(arch=self.arch), value)