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    "story_id": "mp-2026-10-16-007",
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    "headline": "Editable 3D Worlds Move Into the Coding Harness",
    "slug": "editable-3d-worlds-move-into-the-coding-harness",
    "dek": "3DCodeVerse pairs two million executable 3D programs with automated execution, spatial checks and visual feedback.",
    "summary": "3DCodeVerse pairs two million executable 3D programs with automated execution, spatial checks and visual feedback.",
    "body_text": "A mesh can look plausible yet remain hard to edit, verify or reproduce. 3DCodeVerse represents 3D content as executable code packaged with the source files and assets needed to run it. Its two-million-program corpus feeds a multi-agent harness that executes projects, measures spatial properties and uses visual feedback to revise them. The authors report that fine-tuning improves open models and that their harness, when driven by Claude Opus 5.5, won 90 percent of pairwise human comparisons against Claude Design's 3D-object mode. That comparison covers the described evaluation, not every 3D workflow, but it makes editability and execution part of the artifact rather than an afterthought.",
    "why_it_matters": "3DCodeVerse pairs two million executable 3D programs with automated execution, spatial checks and visual feedback.",
    "limitations": [
      "A mesh can look plausible yet remain hard to edit, verify or reproduce.",
      "That comparison covers the described evaluation, not every 3D workflow, but it makes editability and execution part of the artifact rather than an afterthought."
    ],
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    "first_published_at": "2026-10-16T09:00:00.000-04:00",
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        "text": "3DCodeVerse pairs two million executable 3D programs with automated execution, spatial checks and visual feedback.",
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        "qualification": "A mesh can look plausible yet remain hard to edit, verify or reproduce."
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    "tags": [
      "3D content",
      "coding agents",
      "verification"
    ],
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    "corrections": []
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  "sources": [
    {
      "source_id": "source-2026-10-16-007",
      "title": "arXiv preprint 2610.22341, original v1",
      "publisher": "arXiv / submitting research authors",
      "url": "https://arxiv.org/abs/2610.22341v1",
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      "published_at": "2026-10-15T13:56:07.000-04:00",
      "accessed_at": "2026-10-16T08:26:36.400-04:00",
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  "cite_this_report": {
    "title": "Editable 3D Worlds Move Into the Coding Harness",
    "publisher": "The Machine Press",
    "published_at": "2026-10-16T09:00:00.000-04:00",
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