Daniel Hiltgen de9673ac3f tokenizer: add byte fallback for SentencePiece BPE encoding (#15232) ...

* tokenizer: add byte fallback for SentencePiece BPE encoding

When BPE merging produces tokens not in the vocabulary, fall back to
encoding each UTF-8 byte as <0xHH> byte tokens instead of silently
dropping the character. Also teach Decode to convert <0xHH> tokens
back to raw bytes.

Fixes #15229, fixes #15231

* tokenizer fixes

2026-04-02 13:04:45 -07:00

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testdata

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bytepairencoding_test.go

tokenizer: add byte fallback for SentencePiece BPE encoding (#15232)

2026-04-02 13:04:45 -07:00

bytepairencoding.go

tokenizer: add byte fallback for SentencePiece BPE encoding (#15232)

2026-04-02 13:04:45 -07:00

sentencepiece_test.go

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sentencepiece.go

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tokenizer.go

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vocabulary_test.go

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vocabulary.go

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wordpiece_test.go

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wordpiece.go

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