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In this sub-session, the assistant extended the Pre-Compiled Constraint Evaluator (PCE) extraction to support WinningPoSt, WindowPoSt, and SnapDeals proof types in the CuZK proving engine, and added a partitioned pipeline for SnapDeals to overlap synthesis and GPU proving. However, enabling PCE for WindowPoSt caused a crash due to a mismatch in input counts between the witness and the PCE. The assistant traced the root cause to the is_extensible() flag: RecordingCS returned false while WitnessCS returned true, causing different synthesis paths. The fix involved making RecordingCS fully extensible by implementing is_extensible() and extend() methods, and correcting its initialization to pre-allocate a ONE input, ensuring structural parity. The changes compiled cleanly and restored correct proving for WindowPoSt with PCE enabled.

Implement PCE extraction for all proof typesAdd partitioned pipeline for SnapDealsDebug WindowPoSt crash with PCEFix is_extensible() mismatch in constraint systemsCorrect RecordingCS initializationUpdate extract_precompiled_circuit function

Structural Parity in CuZK: Debugging the 196-Input Mismatch That Crashed WindowPoSt Proving 4409 words

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