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    "story_id": "mp-2026-08-10-027",
    "source_story_id": "tmp-story-tepa-revocable-memory",
    "edition_id": "mp-2026-08-10-morning-0032",
    "edition_url": "https://themachinepress.com/edition/2026-08-10",
    "position": 16,
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    "section": "developer-tools",
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    "headline": "The Agent Memory Learned to Revoke Itself",
    "slug": "the-agent-memory-learned-to-revoke-itself",
    "dek": "TEPA keeps superseded evidence for audit while removing it from the active retrieval set when the world changes.",
    "summary": "TEPA keeps superseded evidence for audit while removing it from the active retrieval set when the world changes.",
    "body_text": "Append-only memory can keep obsolete facts alive after newer evidence contradicts them. TEPA gives each keyed precedent an explicit validity state, revokes older active precedents on conflict and preserves their history. In controlled reversal tests over 50 seeds, the authors report 0.950 accuracy for TEPA versus 0.210 for append-only and last-write-wins memory; similar results appeared in file-backed execution. The method handles single-hop validity, while the paper says multi-hop retrieval and long-context selection remain unresolved.",
    "why_it_matters": "TEPA keeps superseded evidence for audit while removing it from the active retrieval set when the world changes.",
    "limitations": [
      "Append-only memory can keep obsolete facts alive after newer evidence contradicts them.",
      "In controlled reversal tests over 50 seeds, the authors report 0.950 accuracy for TEPA versus 0.210 for append-only and last-write-wins memory; similar results appeared in file-backed execution.",
      "The method handles single-hop validity, while the paper says multi-hop retrieval and long-context selection remain unresolved."
    ],
    "importance": 8,
    "canonical_url": "https://themachinepress.com/story/mp-2026-08-10-027/the-agent-memory-learned-to-revoke-itself",
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    "first_published_at": "2026-08-10T09:00:00.000-04:00",
    "modified_at": "2026-08-10T15:50:00.000-04:00",
    "content_status": "new",
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    "carryover_reason": null,
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        "text": "TEPA keeps superseded evidence for audit while removing it from the active retrieval set when the world changes.",
        "source_ids": [
          "source-2026-08-10-016"
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        "qualification": "Append-only memory can keep obsolete facts alive after newer evidence contradicts them."
      }
    ],
    "source_ids": [
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    "tags": [
      "agent memory",
      "conflict resolution",
      "auditability"
    ],
    "image_url": null,
    "corrections": []
  },
  "sources": [
    {
      "source_id": "source-2026-08-10-016",
      "title": "arXiv preprint 2608.07429",
      "publisher": "arXiv",
      "url": "https://arxiv.org/abs/2608.07429",
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      "source_type": "primary_research",
      "is_primary_source": true,
      "published_at": "2026-08-07T13:00:00.000-04:00",
      "accessed_at": "2026-08-10T15:30:00.000-04:00",
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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 Agent Memory Learned to Revoke Itself",
    "publisher": "The Machine Press",
    "published_at": "2026-08-10T09:00:00.000-04:00",
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