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    "story_id": "mp-2026-09-29-007",
    "source_story_id": "tmp-story-robocompiler-closed-chain",
    "edition_id": "mp-2026-09-29-morning-0082",
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    "position": 7,
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    "section": "robotics",
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    "headline": "One Robot Graph Compiled Into Control and Simulation",
    "slug": "one-robot-graph-compiled-into-control-and-simulation",
    "dek": "RoboCompiler kept closure, actuation and dynamics consistent across several looped mechanisms.",
    "summary": "RoboCompiler kept closure, actuation and dynamics consistent across several looped mechanisms.",
    "body_text": "RoboCompiler starts from a canonical mechanism graph and produces closure paths, analytic residual Jacobians, feasible configurations, velocity maps and projected dynamics. The team evaluated excavator, quadruped, robot-arm, humanoid and Stewart-platform mechanisms, with independent checks and execution in MuJoCo and Isaac Sim. For the Kangaroo platform, the paper reports a 96.7% reduction in residual-and-Jacobian evaluation time and a 66.8% reduction in closed-loop rollout wall time with dynamics and control held fixed. Those gains are implementation-specific, not universal compiler speedups.",
    "why_it_matters": "RoboCompiler kept closure, actuation and dynamics consistent across several looped mechanisms.",
    "limitations": [
      "Those gains are implementation-specific, not universal compiler speedups."
    ],
    "importance": 8,
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    "first_published_at": "2026-09-29T09:00:00.000-04:00",
    "modified_at": "2026-09-29T09:00:00.000-04:00",
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        "text": "RoboCompiler kept closure, actuation and dynamics consistent across several looped mechanisms.",
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        "qualification": "Those gains are implementation-specific, not universal compiler speedups."
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    "tags": [
      "robot modeling",
      "closed chains",
      "simulation"
    ],
    "image_url": null,
    "corrections": []
  },
  "sources": [
    {
      "source_id": "source-2026-09-29-007",
      "title": "arXiv preprint 2609.35717",
      "publisher": "arXiv",
      "url": "https://arxiv.org/abs/2609.35717",
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      "published_at": "2026-09-28T13:46:49.000-04:00",
      "accessed_at": "2026-09-29T08:18:00.000-04:00",
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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": "One Robot Graph Compiled Into Control and Simulation",
    "publisher": "The Machine Press",
    "published_at": "2026-09-29T09:00:00.000-04:00",
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