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    "story_id": "mp-2026-08-21-010",
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    "headline": "The Specification Had to Agree Across Every Implementation",
    "slug": "the-specification-had-to-agree-across-every-implementation",
    "dek": "A semantic-block model reduced task context by about 71 percent, while execution tests exposed a 14.4-point variability floor.",
    "summary": "A semantic-block model reduced task context by about 71 percent, while execution tests exposed a 14.4-point variability floor.",
    "body_text": "The work defines specification determinacy as agreement among all conforming implementations and encodes specifications as blocks, dependencies, owned rules, decision points and open questions. In an Oracle-to-PostgreSQL migration case, dependency closures reduced mean per-task context by about 71 percent and covered 85.5 percent of the study’s construct taxonomy. Repeated LLM implementations still showed a median 14.4-point arm-delta spread, supporting determinacy as a formal concept but not a sufficient standalone quality metric.",
    "why_it_matters": "A semantic-block model reduced task context by about 71 percent, while execution tests exposed a 14.4-point variability floor.",
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      "Repeated LLM implementations still showed a median 14.4-point arm-delta spread, supporting determinacy as a formal concept but not a sufficient standalone quality metric."
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    "first_published_at": "2026-08-21T09:00:00.000-04:00",
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    "tags": [
      "software specifications",
      "database migration",
      "execution benchmark"
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  "sources": [
    {
      "source_id": "source-2026-08-21-010",
      "title": "arXiv preprint 2608.19475",
      "publisher": "arXiv",
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      "published_at": "2026-08-18T20:00:00.000-04:00",
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    "title": "The Specification Had to Agree Across Every Implementation",
    "publisher": "The Machine Press",
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