Experimental performance family (default-off): load-balance infrastructure, active-box windowing, block-structured AMR, hybrid WENO/Riemann sensors#1628

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Commits on Jun 29, 2026

feat(sim): add debug envelope tripwire for active-box under-growth
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fix(sim): active-box tripwire checks inner margin (outer layer is frozen-ambient)
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test(sim): golden regression for active_box on a 3D shock case
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test(sim): strengthen active_box golden so box stays a strict subset at save step
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fix(sim): make active-box convert bounds device-resident (GPU present-clause)
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fix(sim): active-box final-review fixes (init ab_active, tighten gate, correct growth comment)
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feat(sim): add load_weight_wrt param and m_load_weight skeleton (no behavior change)
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feat(sim): load_weight base + active-box contributor with field output
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feat(sim): per-rank load-imbalance metric
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feat(sim): bubble (EE/EL) load-weight contributors
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fix(sim): gate bubble load-weight contributions by the active box
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feat(sim): IB load-weight contributor
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feat(sim): phase-change Newton-iteration load-weight contributor
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fix(sim): load-weight metric on parallel_io path + EE reads q_cons (final-review fixes)
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feat(sim): add sfc_partition params and m_sfc_partition skeleton (no behavior change)
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fix(sim): export m_sfc_partition state + guard partition_tile_size>=1
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feat(sim): aggregate per-cell load weight into global tile weights
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feat(sim): Morton space-filling-curve tile ordering
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feat(sim): chains-on-chains balanced contiguous SFC partition
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feat(sim): report SFC-partition predicted imbalance + call wiring
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fix(sim): self-contained SFC report (current + predicted + gain)
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Commits on Jun 30, 2026

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Commits on Jul 6, 2026