{
  "author": "Alisson Bento",
  "source_population": "73 distinct official Los Angeles Public Library CITY directory branch URLs; not LA County or another municipal system",
  "local_snapshot_date": "2026-10-28",
  "source_retrieval_utc_dates": [
    "2026-10-28",
    "2026-10-29"
  ],
  "time_zone": "America/Los_Angeles",
  "retrieved_at_utc_range": [
    "2026-10-28T23:59:24.232813+00:00",
    "2026-10-29T00:03:41.307105+00:00"
  ],
  "units": {
    "start": "Local minutes after midnight",
    "end": "Local minutes after midnight",
    "minutes": "Listed regular interval duration in minutes",
    "after_18_minutes": "Overlap with 18:00–20:00 local time, in minutes",
    "weekly_scheduled_hours": "Sum of seven observed regular intervals divided by 60; complete records only",
    "counts": "Directory records, not verified operating buildings or people"
  },
  "algorithm": "Parse factual literal intervals; explicit Closed gives zero minutes; missing full grid gives unknown. Sum only complete seven-day grids. Exclude all six notice-bearing records for sensitivity. Notices are separate reviewed factual adjudications, not automatically inferred closure dates.",
  "complete_grids": 70,
  "known_day_cells": 490,
  "unknown_day_cells": 21,
  "notices": 6,
  "no_notice_complete_grids": 67,
  "limits": [
    "Los Angeles Public Library city system only. Snapshot: 28 October 2026 in Los Angeles; retrieval across 28–29 October UTC. The 73 directory records include 70 complete regular grids and three missing grids; all 21 unknown day cells stay unknown. Six records carry notices. Listed intervals do not prove actual operation; consult official branch and closure pages before a visit.",
    "No 2024 baseline or trend, visitor/demand/capacity/staffing/budget/demographic or causal estimate.",
    "The undated today notice remains undated. Temporary/offsite schedules are not normal building restoration.",
    "Reproduction from published factual cells validates the analysis, not website acquisition or actual operation."
  ]
}