Follow-up to the rare-event under fix — the whitelist (doubles/triples/HR/SB)
was fragile: the same juiced-under problem exists for steals, blocks, and any
other low-frequency market, and a new stat would slip through.
The real signal is the book's own price. The doubles unders were priced -625 to
-1100 — laying 6-11x to win 1x on an ~82% event, with no value the model could
recover. So the PRIMARY guard is now stat/sport-agnostic: analyzeViaEngine1
refuses any read whose graded-side odds are past the juice floor
(JUICE_ODDS_FLOOR, default -400, env-tunable). That catches every version of
this — steals, blocks, anything — and it also keeps the public record honest
(those -800 "wins" hit ~82% of the time and would inflate the hit rate, the same
class as the projection-0 degradation).
The structural rare-event rules stay as the BACKUP for props with no odds
(list also expanded cross-sport: + steals, blocks). Normal + longshot prices
(-110, -250, +600) are preserved. 16 tests cover both layers.
Reported: the doubles projection was REAL per-player (not a fallback); the fix
is the price guard, not a bigger list.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Betting-logic audit: the CONSENSUS-vs-MODEL board flooded with fake reads like
"DOUBLES u0.5 · MODEL 0.2 · +edge" — the juiced under side of rare counting-stat
markets (doubles/triples/HR/SB), which is never a takeable edge and violates the
no-unders-default doctrine.
Report finding (item 3/4): the doubles projection is REAL per-player, not a flat
fallback — 'doubles' maps to a real game-log field (MLB_LOG_FIELD doubles→
doubles) and the live values varied (0.03/0.16/0.2/0.22). So no projection-gate
refusal for fakeness; the problem is purely structural (a rare event's real
projection always sits below a 0.5 line, so the under always "wins").
Fix (config-driven — src/config/rareEventMarkets.js, tunable stat list + line
threshold):
- Grade layer (analyzeViaEngine1): a rare-event UNDER at ≤0.5 is always REFUSED
(grade null + suppressed flag/reason). A rare-event OVER at ≤0.5 is refused
UNLESS the model genuinely projects the event above the line — because a
0.2-over-0.5 carries the SAME |edge| as the suppressed under and would just
take its rank on the board. The over grades normally once projection > line.
- Board layer (marketBreadth.collectBreadth): drops null-model rows so a
suppressed/ungraded prop can't rank a "MODEL —" placeholder onto the board.
10 suppression tests + config locks; also fixed a settingsPage book assertion
left over from the ESPN→theScore swap. Suite 274/3289 green, web build exit 0.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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