Chunk 34.0

In this final integration chunk, the focus shifted from implementation to upstreaming and build system readiness. The team decided to vendor the forked Rust crates (`bellpepper-core`, `supraseal-c2`) directly inside the Curio repository (Option B) rather than pushing branches to external repos, ensuring a self-contained, reproducible build without upstream coordination. The `Makefile` was extended with `make cuzk`, `install-cuzk`, and `uninstall-cuzk` targets, including pre‑flight checks for `cargo` and `nvcc`. The `cuzk` binary is deliberately excluded from `BINS` and `BUILD_DEPS` so that CI (which lacks CUDA) remains unaffected. All untracked source files for the vendored crates, the Go gRPC client wrapper, and the modified Curio task files were staged and committed with a comprehensive commit message. A new experimental‑features documentation page (`cuzk-proving-daemon.md`) was added to the GitBook, covering requirements, building, daemon configuration, Curio integration, deployment patterns, and troubleshooting. The `SUMMARY.md` and experimental‑features `README.md` were updated to include the new page. After staging all 37 files, a clean build from scratch was verified (`make cuzk` completes in ~2 minutes) and `go vet` passed on all modified Go packages. The commit `3c53695c` was created on the `feat/cuzk` branch, leaving the working tree clean of any cuzk‑related unstaged changes. The overarching themes of this chunk are **production‑ready integration** and **upstream simplicity**. Rather than splitting the code across multiple repositories or waiting for upstream crate releases, the team chose a pragmatic vendor‑in‑repo approach that minimizes external dependencies and CI complexity. The build system is designed to be opt‑in (only builds when CUDA is present), and the documentation ensures storage providers can deploy the daemon with clear, step‑by‑step instructions. The session concluded with the assistant reading the full `cuzk-project.md` and optimization proposals to prepare a detailed PR description that explains the pipelining, memory management, and CPU‑locking architecture behind the cuzk proving engine.

The Upstreaming of a GPU Proving Engine: From Working Prototype to Production-Ready Integration 2452 words

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