docs(backend): EPA rating is EPARating, not SkewNormal - #57
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Upstream avgupta456#412 (169330e, 2026-06-11) deleted the SkewNormal class and replaced it with a mean-only EPARating. backend/CLAUDE.md still described the old model. Also record the API break that came with it, since it generates user reports: dropping the distribution dropped epa_sd/epa_skew/epa_n from TeamEvent/TeamYear, which flattened epa.total_points from {mean, sd} to a float and removed epa.conf on /v3/team_events and /v3/team_years.
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backend/CLAUDE.mddescribed each team's rating as aSkewNormaldistribution. That class was deleted upstream in avgupta456#412 (169330e, 2026-06-11) and replaced by a mean-onlyEPARating;grep -rn SkewNormal backend/srcreturns nothing.Also documents the public API break that came with it, since it has already produced a user report: losing the distribution meant losing the
epa_sd/epa_skew/epa_ncolumns onTeamEvent/TeamYear, which flattenedepa.total_pointsfrom{mean, sd}to a float and removedepa.confon/v3/team_eventsand/v3/team_years.Docs only — no code paths touched, nothing to deploy.