nodes_textgen: Implement use_default_template for LTX

[rattus128]

#13448 (Fix confirmed by OP)

This subclass inherits the schema directly without accepting the new argument to execute.

Example Test Conditions:

Before:

got prompt
CLIP/text encoder model load device: cuda:0, offload device: cpu, current: cpu, dtype: torch.float16
!!! Exception during processing !!! TextGenerateLTX2Prompt.execute() got an unexpected keyword argument 'use_default_template'
Traceback (most recent call last):
  File "/home/rattus/ComfyUI/execution.py", line 534, in execute
    output_data, output_ui, has_subgraph, has_pending_tasks = await get_output_data(prompt_id, unique_id, obj, input_data_all, execution_block_cb=execution_block_cb, pre_execute_cb=pre_execute_cb, v3_data=v3_data)
                                                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/rattus/ComfyUI/execution.py", line 334, in get_output_data
    return_values = await _async_map_node_over_list(prompt_id, unique_id, obj, input_data_all, obj.FUNCTION, allow_interrupt=True, execution_block_cb=execution_block_cb, pre_execute_cb=pre_execute_cb, v3_data=v3_data)
                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/rattus/ComfyUI/execution.py", line 308, in _async_map_node_over_list
    await process_inputs(input_dict, i)
  File "/home/rattus/ComfyUI/execution.py", line 296, in process_inputs
    result = f(**inputs)
             ^^^^^^^^^^^
  File "/home/rattus/ComfyUI/comfy_api/internal/__init__.py", line 149, in wrapped_func
    return method(locked_class, **inputs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/rattus/ComfyUI/comfy_api/latest/_io.py", line 1789, in EXECUTE_NORMALIZED
    to_return = cls.execute(*args, **kwargs)
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: TextGenerateLTX2Prompt.execute() got an unexpected keyword argument 'use_default_template'

Prompt executed in 0.23 seconds

After:

got prompt
Model Gemma3_12BModel_ prepared for dynamic VRAM loading. 23235MB Staged. 0 patches attached. Force pre-loaded 290 weights: 1497 KB.
Generating tokens:  35%|███▍      | 89/256 [00:02<00:04, 38.35it/s]
Prompt executed in 2.56 seconds

[coderabbitai]

📝 Walkthrough

Walkthrough

This change adds a new optional use_default_template parameter (defaulting to True) to the execute methods of two text generation node classes in comfy_extras/nodes_textgen.py: TextGenerate and TextGenerateLTX2Prompt. The parameter is passed through to the parent class's execute method and controls template behavior during tokenization via the skip_template flag. The underlying prompt formatting logic remains unchanged. The modification is minimal, affecting only the method signatures and parameter forwarding.

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately describes the main change: adding use_default_template parameter support to the LTX subclass (TextGenerateLTX2Prompt).
Description check	✅ Passed	The description directly references the issue and provides before/after logs showing the specific error being fixed and successful execution afterward.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

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