Combined spec/quality review caught two minor issues in the Pearl 6
commit. Both are mechanical fixes; no behavior change.
1. Test 12 (pearl_6_kelly_within_fold_ewma_blend) was missing an
explicit assertion for slot 282 (TRADE_VAR_SMOOTH_IDX). The test
setup initialized tvar_i32 and the launcher passed it through the
kernel's parameter slot, but no assert! ever fired against the
resulting ISV value. With n_envs=1, the kernel's
`(kelly_count > 1) ? variance : 0.0f` branch returns 0 (no
cross-env variance possible with 1 env), so EWMA blend yields
0.99 × 0.5 + 0.01 × 0.0 = 0.495. Added the missing assertion to
close the within-fold coverage gap for s==2.
2. pearl_6_kelly_kernel.cu:136 doc comment said the slot computes
"standard deviation of per-env Kelly fractions" but the code
actually computes `ksum_sq / kelly_count` — i.e. the variance
(second moment), not the standard deviation. The slot name
TRADE_VAR_SMOOTH_INDEX correctly indicates variance; the comment
was wrong. Updated comment to match: 'variance of per-env Kelly
fractions' with explicit note that this is the second moment,
NOT std-dev (no sqrtf applied).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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