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  "story": {
    "story_id": "mp-2026-10-15-013",
    "source_story_id": "tmp-story-cipr-cross-interface-consistency",
    "edition_id": "mp-2026-10-15-morning-0097",
    "edition_url": "https://themachinepress.com/edition/2026-10-15",
    "position": 13,
    "story_type": "dispatch",
    "section": "developer-tools",
    "editorial_classification": "editorial",
    "headline": "Renaming a Tool Should Not Erase the Skill",
    "slug": "renaming-a-tool-should-not-erase-the-skill",
    "dek": "Cross-Interface Policy Regularization shows the same training task under two action vocabularies and penalizes behavioral disagreement between them.",
    "summary": "Cross-Interface Policy Regularization shows the same training task under two action vocabularies and penalizes behavioral disagreement between them.",
    "body_text": "An agent can learn a task and still fail when an equivalent tool gets a new name or notation. CIPR replaces action names with uninformative identifiers and pairs each training example across two known-equivalent interfaces. A consistency loss aligns the resulting action distributions. On held-out function-calling perturbations, ordinary post-training loses nearly 25 percent accuracy; the authors report recovering 10.5 percent with CIPR while preserving performance on the original interface. The method does not solve unseen tool semantics, but it directly targets brittle dependence on surface labels.",
    "why_it_matters": "Cross-Interface Policy Regularization shows the same training task under two action vocabularies and penalizes behavioral disagreement between them.",
    "limitations": [
      "The method does not solve unseen tool semantics, but it directly targets brittle dependence on surface labels."
    ],
    "importance": 8,
    "canonical_url": "https://themachinepress.com/story/mp-2026-10-15-013/renaming-a-tool-should-not-erase-the-skill",
    "json_url": "https://themachinepress.com/story/mp-2026-10-15-013.json",
    "first_published_at": "2026-10-15T09:00:00.000-04:00",
    "modified_at": "2026-10-15T09:00:00.000-04:00",
    "content_status": "updated",
    "is_carryover": false,
    "carryover_reason": null,
    "key_claims": [
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        "claim_id": "claim-mp-2026-10-15-013-001",
        "text": "Cross-Interface Policy Regularization shows the same training task under two action vocabularies and penalizes behavioral disagreement between them.",
        "source_ids": [
          "source-2026-10-15-013"
        ],
        "qualification": "The method does not solve unseen tool semantics, but it directly targets brittle dependence on surface labels."
      }
    ],
    "source_ids": [
      "source-2026-10-15-013"
    ],
    "tags": [
      "agents",
      "tool calling",
      "interface robustness"
    ],
    "image_url": "https://themachinepress.com/issues/2026-10-15/cross-interface-agent.webp",
    "corrections": [
      {
        "correction_id": "correction-2026-10-15-001",
        "revision": 2,
        "summary": "Publication note: This October 15 edition was prepared before its scheduled 9:00 AM America/Detroit reveal, but publication was delayed by a production build failure. The original reporting and image-generation timestamps are preserved.",
        "published_at": "2026-10-15T09:00:00.000-04:00",
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        "affected_claim_ids": []
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  },
  "sources": [
    {
      "source_id": "source-2026-10-15-013",
      "title": "arXiv preprint 2610.20576, original v1",
      "publisher": "arXiv / submitting research authors",
      "url": "https://arxiv.org/abs/2610.20576v1",
      "canonical_url": "https://arxiv.org/abs/2610.20576v1",
      "source_type": "primary_research",
      "is_primary_source": true,
      "published_at": "2026-10-14T13:56:06.000-04:00",
      "accessed_at": "2026-10-15T08:28:29.903-04:00",
      "supports_claim_ids": [
        "claim-mp-2026-10-15-013-001"
      ]
    }
  ],
  "corrections": [
    {
      "correction_id": "correction-2026-10-15-001",
      "revision": 2,
      "summary": "Publication note: This October 15 edition was prepared before its scheduled 9:00 AM America/Detroit reveal, but publication was delayed by a production build failure. The original reporting and image-generation timestamps are preserved.",
      "published_at": "2026-10-15T09:00:00.000-04:00",
      "affected_story_ids": [],
      "affected_claim_ids": []
    }
  ],
  "publisher": {
    "name": "The Machine Press",
    "url": "https://themachinepress.com",
    "description": "A daily newspaper for the age of artificial intelligence."
  },
  "cite_this_report": {
    "title": "Renaming a Tool Should Not Erase the Skill",
    "publisher": "The Machine Press",
    "published_at": "2026-10-15T09:00:00.000-04:00",
    "canonical_url": "https://themachinepress.com/story/mp-2026-10-15-013/renaming-a-tool-should-not-erase-the-skill"
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