Bite-sized 12-task runbook for the recentering fix specified in
`docs/plans/2026-05-12-sp22-h6-phase2-recenter.md`. Tasks 1-5 are the
5 atomic edits (kernel write recentered to `2*p - 1`, sentinels 0.5
→ 0.0 across host + 3 NULL-fallback kernels, plus comment updates in
state_layout.rs / state_layout.cuh). Tasks 6-8 are the three
verification gates (cargo check / gpu_backtest_validation /
compute-sanitizer) identical to H6 Phase 1 — all required clean before
commit. Task 9 appends the H6 Phase 2 entry to the audit doc
(Invariant 7 satisfaction). Task 10 is the single atomic commit per
`feedback_no_partial_refactor` covering all 5 source files + audit
doc. Task 11 dispatches the 3-epoch baseline smoke on
ci-training-l40s. Task 12 monitors for the cycle-1 verdict using the
same single-channel grep-anchored bg waiter pattern as Phase 1
(per `feedback_no_redundant_monitor`).
Every task has exact file paths, complete code blocks for edits
(showing old + new strings for Edit-tool consumption), exact commands
with expected output, and explicit kill criteria for verification gate
failures.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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