standings_2023.csv = real 2023 MLB final standings (W/L/RS/RA/RunDiff), public record.
standings_multiseason.json = full regular-season standings 2021-2024 (W/L/winpct/RS/RA per team),
  pulled from the public MLB Stats API (statsapi.mlb.com), retrieved 2026-06-20. Real final results
  (2020 omitted: COVID 60-game season). Refresh by re-querying the API per season.

standings_2015_2024.json = full regular-season standings 2015-2024 (2020 omitted), MLB Stats API, retrieved 2026-06-21. Real final results.

team_batting_2024.json = 2024 team batting (AVG/OBP/SLG/OPS/HR/runs) joined to final win%, MLB Stats API, retrieved 2026-06-22. Real.

run_environment_2015_2025.json = league-wide regular-season run totals per season 2015-2025
  (total runs, games, combined runs/game; INCLUDES the 60-game 2020 season - rate stats stay
  comparable), MLB Stats API, retrieved 2026-07-06 via build_run_environment.py. Real.

one_run_2026.json = live 2026 one-run game records per team (oneRun/extraInning splits from
  the standings endpoint's records.splitRecords, joined to overall W-L; rest_* = overall minus
  one-run), plus a history block with each FULL season 2021-2025's league one-run share and
  the r between one-run win% and rest win%. MLB Stats API, retrieved 2026-07-13 via
  build_one_run_2026.py. Real. Refresh by re-running the builder.

remaining_schedule_2026.json = every 2026 regular-season game not yet decided at retrieval
  (schedule endpoint, gameType=R; Postponed entries dropped because their makeups appear as
  separate entries), tallied per team: remaining games, home/road split, games vs each
  opponent, and the games-weighted mean of opponents' CURRENT win% from the bundled
  standings snapshot (sos_wins_vs_500 = (opp win% - .500) x remaining G). Also league
  home-team win rate over completed 2026 games. MLB Stats API, retrieved 2026-07-17 via
  build_remaining_schedule.py. Real. Refresh by re-running the builder.