Add MiniMax H3 prompt rewriter workflow

models/minimax/lightx2v-minimax-h3-prompt-rewriter-8b-comfyui/README.md

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+# MiniMax H3 Prompt Rewriter 8B ComfyUI
+
+## Summary
+
+ComfyUI workflow bundle for turning raw MiniMax H3 ideas into the structured prompt format used by the prompt rewriter model.
+
+## Model Family
+
+- `minimax`
+
+## Status
+
+- `imported-only`
+
+## Source
+
+- Model card: <https://huggingface.co/Codes4Fun/lightx2v_MiniMax-H3-Prompt-Rewriter-8B_ComfyUI>
+- Workflow file: <https://huggingface.co/Codes4Fun/lightx2v_MiniMax-H3-Prompt-Rewriter-8B_ComfyUI/resolve/main/comfyui-minimax-h3-rewriter-8b.json>
+- Source README notes that this is a merge of `lightx2v/MiniMax-H3-Prompt-Rewriter-LoRA-8B` with `Qwen/Qwen3-VL-8B-Instruct`
+- Date imported: `2026-08-21`
+
+## Developer notes
+
+- The workflow is a helper, not a generator. It rewrites prompts for MiniMax H3-style video and audio/video tasks.
+- The source graph includes a `TextGenerate` node plus a `CLIPLoader` wired to `qwen3vl_8b_rewriter_bf16_comfyui.safetensors`.
+- Most of the rest of the graph looks like stock ComfyUI plumbing.
+
+## Our notes
+
+- Useful if you want cleaner MiniMax prompts without hand-tuning the long format every time.
+- Less interesting than a direct generation workflow, but still practical and easy to slot into a MiniMax H3 prep chain.
+
+## Required custom nodes
+
+- MiniMax-compatible `TextGenerate` node from the source workflow
+- standard ComfyUI core nodes used by the graph
+
+## Notes
+
+- Good helper workflow for prompt preparation.
+- Not a standalone video model.