Per spec §6.3. Per-step kernel reads PS_PEAK_EQUITY (slot 7) and
PS_PREV_EQUITY (slot 9) from existing position state buffer (no new
equity slot needed). Writes 6 ISV slots (401-406). Calmar uses
max(dd_max, 1e-4) floor — eliminates the saturation-at-100 artifact
seen in train-dd4xl HEALTH_DIAG.
6 fold-reset registry entries + dispatch arms. 5 sentinel-0 stateful
outputs; calmar uses sentinel 1e-4 (same value as the kernel's floor)
so cold-start division uses the floor rather than ±inf.
Atomic split per feedback_no_partial_refactor.md (mirrors Task 1.1 +
1.2 precedent): kernel + launcher + registry land here; per-step
production wire-up + HEALTH_DIAG composer deferred to a follow-up
commit. Test 1.3 oracle on 6-step synthetic equity curve passes
locally on RTX 3050 Ti (sm_86) in 1.61s. cargo test -p ml --lib
--features cuda: 946 passed / 13 failed — same 13 pre-existing
failures as Task 1.2 baseline (a92ff28a9); zero introduced.
State-reset registry tests: 4/4 pass.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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