1. Import style inconsistency (minor)
    - Line 131: import_optional is used inside the __call__ method but not at module level
    - Consider whether llguidance could be imported at module load time (if always available for granite formatters) or if lazy loading is intentional for performance
  2. Docstring incompleteness
    - _GuidanceLogitsProcessor.__init__ has a docstring but the class docstring says "Apply... to batch_scores" — it should clarify that it's a logits processor callback
    - Current: "A HuggingFace logits processor that enforces an llguidance grammar." (good enough, but could add a line about usage context)
  3. Error message ambiguity (line 305)
    - Old: Two separate error checks for missing tokenizer and model
    - New: One unified error mentioning both
    - The new error at line 333 requires both when constrained_decoding_prefix is used, but this is only enforced inside the nested conditional. Consider lifting this validation earlier or documenting
  the dependency more clearly.
  4. Type annotation edge case
    - Line 291: tokenizer: PreTrainedTokenizerBase | None = None but at line 311 it assumes tokenizer is not None without a guard when computing vocab_size. Guard added at line 312 (if ll_tokenizer is 
  None) mitigates this, but the logic flow could be clearer.
  5. Testing coverage not shown
    - Diff doesn't include test updates. PR says tests pass, but verify:
        - Unit tests for _GuidanceLogitsProcessor in the new location
      - Integration tests with ll_tokenizer parameter
      - Edge case: what happens if both tokenizer and ll_tokenizer are None and constrained decoding is requested?