{ "format_version": "1", "case": "partial", "title": "One collection unavailable", "question": "What can the remaining literature collection answer?", "mode": "recorded", "simulation": true, "registry_revision": "2026-11-09", "generated_at": null, "replay_clock": "2026-11-09T00:00:00Z", "timestamp_note": "Envelope retrieval timestamps use a fixed replay clock, not publisher retrieval times. 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