happy-llm/docs/chapter5/code/tokenizer_k/special_tokens_map.json

{
    "bos_token": "<|im_start|>",
    "eos_token": "<|im_end|>",
    "unk_token": "<unk>",
    "pad_token": "<|im_end|>",
    "additional_special_tokens": [
        "<s>",
        "</s>"
    ]
}