Fail closed on non-finite account risk scores#56
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Summary
[0, 1]clamp for finite scoresNaN, positive infinity, and negative infinity with regression testsRoot cause
Math.min/Math.maxpreserveNaN, andriskBandForScore(NaN)falls through to the low-risk band. Negative infinity clamps to zero. Both cases can make malformed external risk input fail open.Validation
vitest run packages/account-core/src(8 tests passed)tsc -p packages/account-core/tsconfig.json --noEmitFixes #55