Condensation Parity Walkthrough Ownership Record

This E5-F8-P3 record is the source of truth for routing deferred capabilities from the bounded direct-condensation walkthrough.

Supported evidence boundary

The walkthrough source compares an independent fp64, fixed-four-substep NumPy oracle with the low-level direct GPU kernel. Its walkthrough regression test keeps that bounded comparison executable.

Physics, conservation, and energy are separately evaluated evidence. Warp CPU is the supported baseline when installed; CUDA is optional, additive evidence. This record does not establish high-level CPU strategy parity, Runnable parity, or general CPU workflow parity. The fixed-four direct-kernel evidence boundary states the related P1--P4 production-hook limit.

Deferred capability ownership

Deferred capability	Downstream owner	Entry gate	E5-F8 non-claim
thermal_work consumption	Future approved condensation numerical-method work	An approved numerical-method plan and numerical/validation contract are required.	thermal_work consumption is outside the walkthrough/E5-F8 scope.
temperature feedback	Future approved condensation numerical-method work	An approved numerical-method plan and numerical/validation contract are required.	temperature feedback is outside the walkthrough/E5-F8 scope.
adaptive stepping	Future approved condensation numerical-method work	An approved numerical-method plan and numerical/validation contract are required.	adaptive stepping is outside the walkthrough/E5-F8 scope.
backend selection	Epic G	Backend-selection and GPU-resident integration work is required.	backend selection is outside the walkthrough/E5-F8 scope.
high-level Aerosol/Runnable integration	Epic G	Backend-selection and GPU-resident integration work is required.	high-level Aerosol/Runnable integration is outside the walkthrough/E5-F8 scope.
GPU-resident/full-workflow coupling	Epic G	Backend-selection and GPU-resident integration work is required.	GPU-resident/full-workflow coupling is outside the walkthrough/E5-F8 scope.
general CPU workflow/strategy parity	Epic G	Backend-selection and GPU-resident integration work is required.	general CPU workflow/strategy parity is outside the walkthrough/E5-F8 scope.
graph capture/replay	Epic H	Graph-capturable stable-shape loop validation and capture/performance exit work are required.	graph capture/replay is outside the walkthrough/E5-F8 scope.
host-validation/capture separation	Epic H	Graph-capturable stable-shape loop validation and capture/performance exit work are required.	host-validation/capture separation is outside the walkthrough/E5-F8 scope.
performance/benchmarking	Epic H	Benchmark/memory-budget exit work is required.	performance/benchmarking is outside the walkthrough/E5-F8 scope.
memory-budget work	Epic H	Benchmark/memory-budget exit work is required.	memory-budget work is outside the walkthrough/E5-F8 scope.
broad state/multi-step autodiff	Epic I	Differentiability and gradient-validation work is required; it is distinct from the shipped raw-rate interior probe.	broad state/multi-step autodiff is outside the walkthrough/E5-F8 scope.
phase-aware surface tension	Approved condensation-physics expansion	An approved plan and physics-validation contract are required.	phase-aware surface tension is outside the walkthrough/E5-F8 scope.
BAT activity	Approved condensation-physics expansion	An approved plan and physics-validation contract are required.	BAT activity is outside the walkthrough/E5-F8 scope.

Focused reproduction commands

python docs/Examples/gpu_condensation_parity_walkthrough.py
pytest particula/gpu/tests/gpu_condensation_parity_walkthrough_test.py -q -Werror
pytest particula/gpu/kernels/tests/condensation_test.py -q -Werror
pytest particula/gpu/kernels/tests/condensation_stiffness_test.py -q -Werror
pytest particula/gpu/kernels/tests/condensation_graph_capture_test.py -q -Werror
pytest particula/gpu/kernels/tests/condensation_autodiff_test.py -q -Werror
pytest particula/tests/condensation_parity_walkthrough_docs_test.py -q -Werror

Downstream roadmap owners

Deferred integration and workflow work belongs to Epic G. Capture, validation separation, and performance work belong to Epic H. Broad state autodiff belongs to Epic I.