feat: add Llama 3 tokenizer support#4
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Add comprehensive support for Meta's Llama 3 family (3.0 through 3.3), including all official special tokens and extended agent vocabulary. Implementation: - Add LLAMA3_PATTERN constant and llama3.tiktoken vocabulary - Support "llama3", "llama3.1", "llama3.2", "llama3.3" in from_pretrained() - Add all Meta standard tokens (begin_of_text, eot_id, python_tag, etc.) - Implement 54 agent tokens starting at 128300 (avoiding Meta's reserved range) - Align <|image|> token with official Meta 3.2-Vision ID (128256) - Export LLAMA3_AGENT_TOKENS Python API with all token constants Documentation: - Add Llama 3 to supported vocabularies table - Document Meta's official tokens and chat format - Add comprehensive special_tokens.md section for Llama 3 - Include Python usage examples for both OpenAI and Llama 3 models - Document version-specific tokens (3.1 tool use, 3.2 vision) This maintains full compatibility with the Llama 3 token allocation while extending the vocabulary with splintr's agent tokens for chat, reasoning, tool calling, and RAG applications.
Add test coverage for cl100k, o200k, and llama3 tokenizers in both Rust and Python implementations. Rust tests (tests/): - Encode/decode roundtrip validation - Special token handling - Batch encoding operations - Streaming decoder functionality - Edge case handling - Agent token constant validation Python tests (python/tests/): - Mirror Rust test coverage - PyO3 binding validation - Cross-language consistency checks Also includes uv.lock for Python dependency management.
Update version across all configuration files and enhance pre-commit hook to automatically update uv.lock when pyproject.toml changes.
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Summary
<|image|>token with official Meta Llama 3.2-Vision ID (128256)Changes
LLAMA3_PATTERN, bundled vocabulary,LLAMA3_AGENT_TOKENSPython API