{
  "schema": "studycommons.hero.provenance.v2",
  "asset_role": "Study Commons public Daily Read hero",
  "slug": "the-buddy-bench-short-story",
  "generation_id": "img-07483f613d374c8cd7706bc8",
  "generator": "QwenImage21Pipeline",
  "model": "Qwen/Qwen-Image-2.1-Turbo",
  "model_revision": "fc13ba1986fcb905854dc8de2f52eee395f49b5b",
  "model_license": "Qwen Research License, non-commercial research/evaluation only; commercial use requires separate permission",
  "model_index_sha256": "97e2febeb19d93cb41fa44807cde8bd42757950b5dffeacdb0331fb2d390cf20",
  "checkpoint_sha256": "37230cd77d377c0be0acc06d628fd8a6e978e23eb2c530b73fa98df54ef62557",
  "renderer_source_sha256": "9668ef4c512a6a71ad2a84ae250b936f143c43d321d1e5dd93967307d41edea2",
  "prompt": "Wide 16:9 realistic warm editorial illustration for a middle elementary school original fiction story. A sturdy refurbished BLUE wooden buddy bench with a SINGLE SMALL YELLOW STAR painted on one end in a safe leafy Canadian public school playground. A friendly Grade 4 boy and a younger Grade 2 girl in a purple knit hat meet near the bench, he offers a welcoming open-hand gesture toward classmates playing four square in the soft-focus distance. Faces natural, gentle and not posed, authentic school playground, early autumn afternoon, kind human warmth, accurate human anatomy, tasteful storybook photographic realism, strong composition with ample room for a mobile crop. No words or bench lettering, no readable signs, no text, no labels, no logos, no watermark.",
  "prompt_sha256": "885b42dea18179cf61b1740e766f521df1ac7667a60ecff929d439845f908b04",
  "negative_prompt": "",
  "seed": 110302,
  "width": 1312,
  "height": 736,
  "num_inference_steps": 8,
  "true_cfg_scale": 1.0,
  "scheduler": "FlowMatchEulerDiscreteScheduler",
  "sampling": "explicit-checkpoint-8-sigma",
  "sample_sigmas": [
    1.0,
    0.978453,
    0.95418,
    0.926626,
    0.89508,
    0.845148,
    0.704534,
    0.414568
  ],
  "generator_device": "cpu",
  "generator_algorithm": "torch.Generator('cpu').manual_seed(seed)",
  "torch_dtype": "bfloat16",
  "cpu_offload": "model",
  "use_kv_cache": true,
  "vae_tiling": true,
  "lora": null,
  "reference_images": [],
  "gpu": "NVIDIA CUDA (hardware-specific machine details withheld)",
  "runtime": {
    "torch": "2.14.0+cu130",
    "diffusers": "0.41.0.dev0",
    "transformers": "5.17.0",
    "cuda": "13.0"
  },
  "job_completed_at": "2026-11-03T19:04:48.833719+00:00",
  "output_png_sha256": "07483f613d374c8cd7706bc8f35a580fb0bf22d1d51592b6737e92432491787d",
  "output_png_dimensions": [
    1312,
    736
  ],
  "postprocess": {
    "format": "AVIF",
    "ffmpeg_version": "ffmpeg version 6.1.1-3ubuntu5 Copyright (c) 2000-2023 the FFmpeg developers",
    "filter": "scale=1280:720:force_original_aspect_ratio=increase:flags=lanczos,crop=1280:720",
    "encoder": "libaom-av1",
    "still_picture": 1,
    "crf": 16,
    "bitrate": "0",
    "cpu_used": 6,
    "pix_fmt": "yuv420p",
    "frames": 1,
    "source_png_sha256": "07483f613d374c8cd7706bc8f35a580fb0bf22d1d51592b6737e92432491787d",
    "output_avif_sha256": "102c1579e3345257f981851722b4d3f8c69d5fc6e3a5bbf1690e00bf611f6359",
    "output_avif_width": 1280,
    "output_avif_height": 720,
    "output_avif_bytes": 111646
  },
  "reproduce": {
    "recipe": "QwenImage21Pipeline.from_pretrained(model_path, dtype=torch.bfloat16); enable_model_cpu_offload(); vae.enable_tiling(); pipeline(prompt=prompt, width=width, height=height, true_cfg_scale=1.0, num_inference_steps=8, sigmas=sample_sigmas, use_kv_cache=True, generator=torch.Generator('cpu').manual_seed(seed)); encode PNG to AVIF using postprocess fields",
    "model_source": "Hugging Face model ID and exact model_revision above, subject to the stated license",
    "verification": "Compare generated PNG and AVIF against SHA-256 fields. Accelerator and software differences may prevent bit-for-bit equality."
  },
  "provenance_note": "Generation parameters and cryptographic integrity chain, not proof of legal ownership or absence of third-party rights. Private machine paths are excluded."
}