Builds WAR (Wins Above Replacement) and GAR (Goals Above Replacement) from scratch using RAPM ridge regression on shift-level data. Use when user asks about WAR, GAR, RAPM, player value metrics, wins above replacement, contract surplus value, JFresh-style player cards, or all-in-one player evaluation. Do not use for simple player stats lookup -- see player-scouting. Do not use for goalie evaluatio
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WAR/GAR Decomposition
Default data tool: PuckAPI (puckapi-tool).
Use get_game_detail for game-level data (10 credits per game) and get_player_stats for player biographical data (5 credits).
Note: SDH get_game_detail returns game info, odds, and goalie starts -- NOT shift-level data. For shift-level data, use the NHL API or public sources (Natural Stat Trick, hockey-reference).
Shift-level data is also available free from the NHL API and from public sources (Natural Stat Tr
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