Segment 10
The session continued hardening the vast-manager platform by improving benchmark error log shipping, adding persistent deploy settings and multi-select bulk actions to the web UI, and refining the backend to keep the highest benchmark score per machine, clean stale instances, and reject known-bad hosts on deploy. Operational monitoring deployed new instances for performance data while several existing ones failed min_rate thresholds. The focus then shifted to a critical production bug where PSProve tasks fail for PoRep challenges when processed through CuZK, while Snap tasks work correctly. The assistant meticulously compared the PSProve code path (task_prove.go) with the normal CuZK path (cuzk_funcs.go), discovering that the PSProve path defines a local C1OutputWrapper struct instead of using the shared wrapC1Output function, re-marshaling the C1 output from Go rather than passing raw Rust JSON bytes. This identified a potential JSON serialization round-trip issue where custom MarshalJSON methods lack UnmarshalJSON, combined with a SectorNum type mismatch (int64 vs u64), causing the Rust CuZK engine to deserialize the VanillaProof bytes incorrectly.