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PROJECT · findings note

project_wnba_snapshot_depth_gap

WNBA data-hydrator snapshot is missing 9 of 14 per-player depth blocks (vs_opponent, prop_metrics, advanced, projection, rotation_pattern, clutch_stats, series_history, memory, props) AND the entire snapshot.stats team-level block. Caught 2026-06-08 via new MCP get_player_depth tool returning legitimate Nones.

← All findingssource · memory/project_wnba_snapshot_depth_gap.md

What's missing on WNBA snapshots (per Stewart 1627668 in game 1022600083, 2026-06-08)

NBA per-player block has 14 rich keys. WNBA only populates 4:

PRESENT on WNBA:

  • season_averages (player_id/name/pts/reb/ast/min/games_played + shooting %)
  • rolling_averages (last_3/5/10 for points/rebounds/assists — last_3_* keys are 0, only L5/L10 useful)
  • recent_games (per-game log — present)
  • prop_diagnostic.stats (per-stat: line_edges/flags/momentum — but adjusted_projection=0/baseline_q50=0 because projections-engine WNBA port hasn't shipped, so line_edges.quality buckets are degenerate)

MISSING on WNBA (all None):

  • vs_opponent — H2H summary (avg pts/reb/ast vs this opponent over career)
  • vs_opponent_games — per-game H2H log (enables H2H median reconstruction)
  • prop_metrics — per-stat home_mean / away_mean / b2b_mean / recent_mean / season_mean / playoff_mean / std
  • advanced — player advanced stats
  • projection — projections-engine output
  • rotation_pattern, clutch_stats, series_history, memory, props

MISSING at game/team level: snapshot.stats is {} (entirely empty dict). No home_defense / away_defense / home_advanced / away_advanced / head_to_head.

Also missing: injuries.home_team_name / away_team_name are empty strings (but home_team_id / away_team_id ARE populated — 1611661323 / 1611661313 for NYL/CON).

Why it matters

The MCP server's get_player_depth / enrich_pick tools (shipped 2026-06-08 commit 2cf27e1) return prop_metrics=None, vs_opponent=None, matchup_dvp=None for every WNBA player. This is CORRECT behavior on the MCP side — the source data isn't there. So WNBA pick generation through the MCP is limited to:

  1. verify_pick line_edges (degenerate due to missing projection)
  2. verify_pick recent_vs_baseline_flag (mostly "stable" since no baseline)
  3. verify_pick matchup_h2h (READS from prop_diagnostic.stats.<stat>.matchup_h2h — need to verify whether THAT sub-block is populated on WNBA)
  4. depth.rolling_averages (L5/L10 only — L3 is zeros)
  5. depth.recency (recent_games log)
  6. depth.flags (active_status — FIX 5 IS working on WNBA via boxscore-derived roster, per project_wnba_lockdown_live)

Where the gap lives (file:line targets for the fix)

data-hydrator assembler. Compare NBA player-builder to WNBA player-builder.

Repo paths to grep starting points:

  • data-hydrator/internal/snapshot/*.go — per-league snapshot assemblers
  • data-hydrator/internal/insights/player_insights.go — likely owner of prop_metrics + vs_opponent (had propMetricsKey for NBA at lines 1169-1183 per project_multi_formula_clv_harness)
  • The roster-fallback path for WNBA pre-tip (commit 87befcc on data-hydrator) populates season_averages from boxscore but skips the rich blocks

Workaround for tonight (and any WNBA day until this is fixed)

When producing picks via MCP:

  • IGNORE enrich_pick.depth.prop_metrics / vs_opponent / matchup_dvp for WNBA (will be None)
  • USE enrich_pick.depth.rolling_averages (L5/L10) + recency + active_status flags
  • USE verify_pick.system.matchup_h2h IF populated (TBD on WNBA — check)
  • Cross-check Pinnacle de-vig via odds-service WNBA route (per reference_odds_service_wnba_route)

Cross-references