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    "story_id": "mp-2026-08-20-027",
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    "section": "robotics",
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    "headline": "The Coding Agent Pushed the Alphabet",
    "slug": "the-coding-agent-pushed-the-alphabet",
    "dek": "A coding loop solved Push-T without demonstrations, then extended its generated simulator curriculum from A through Z.",
    "summary": "A coding loop solved Push-T without demonstrations, then extended its generated simulator curriculum from A through Z.",
    "body_text": "For the classic Push-T benchmark, an LLM coding agent searched for the simulation, experimented with push mechanics and iteratively wrote a policy. The authors report 100 percent simulated success with 46 percent fewer steps than a diffusion policy trained on 200 demonstrations, then extend the method to alphabet-shaped blocks and two simulated robot arms. Videos and fuller details were still promised, so the striking claims remain an early short-paper result rather than independent verification.",
    "why_it_matters": "A coding loop solved Push-T without demonstrations, then extended its generated simulator curriculum from A through Z.",
    "limitations": [
      "Videos and fuller details were still promised, so the striking claims remain an early short-paper result rather than independent verification."
    ],
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    "first_published_at": "2026-08-20T09:00:00.000-04:00",
    "modified_at": "2026-08-20T09:00:00.000-04:00",
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        "text": "A coding loop solved Push-T without demonstrations, then extended its generated simulator curriculum from A through Z.",
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        "qualification": "Videos and fuller details were still promised, so the striking claims remain an early short-paper result rather than independent verification."
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    "source_ids": [
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    "tags": [
      "robot manipulation",
      "coding agents",
      "simulation"
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    "image_url": null,
    "corrections": []
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  "sources": [
    {
      "source_id": "source-2026-08-20-016",
      "title": "arXiv preprint 2608.18227",
      "publisher": "arXiv",
      "url": "https://arxiv.org/abs/2608.18227",
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      "published_at": "2026-08-17T20:00:00.000-04:00",
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  "publisher": {
    "name": "The Machine Press",
    "url": "https://themachinepress.com",
    "description": "A daily newspaper for the age of artificial intelligence."
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  "cite_this_report": {
    "title": "The Coding Agent Pushed the Alphabet",
    "publisher": "The Machine Press",
    "published_at": "2026-08-20T09:00:00.000-04:00",
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