2025-09 Monthly Summary — Scroll-tech/ceno: Stability-focused maintenance with a critical dependency upgrade to ensure runtime reliability and cross-repo compatibility. This month concentrated on upgrading internal dependencies to align the recursion stack, reducing runtime risk and improving build consistency for upcoming releases.

July 2025 monthly summary for scroll-tech/ceno. The primary focus was delivering a Plonky3-style verifier API refactor and enabling recursion verification through public field exposure, both of which strengthen modularity, maintainability, and future extensibility of the verifier pipeline. Work laid groundwork for upcoming ZK-proof features by reorganizing core proof representations and simplifying commitment/opening procedures.

June 2025 — Delivered architectural unifications in scroll-tech/ceno: a single Prover framework for CPU/GPU and a unified Plonky3 API across repositories. These changes reduce integration risk, boost maintainability, and accelerate future feature delivery. No major bugs fixed this month. Technologies demonstrated include Rust trait-based architecture (ProverBackend, ProverDevice), API modernization (FieldAlgebra, from_canonical_uX), and cross-repo dependency alignment.

May 2025 monthly summary for scroll-tech/ceno: Delivered a unified proof generation workflow for opcode and table circuits in ZKVM by refactoring the prover to use a single create_chip_proof function, reducing duplication and aligning proof/verification logic. No major bugs fixed this month. Overall impact: simplified codebase, improved consistency, and stronger verification, enabling faster iteration and safer deployment. Technologies/skills demonstrated: ZKVM proof system, Rust/refactoring, code consolidation, testing and verification practices.

April 2025 performance summary for scroll-tech/ceno: focused verifier efficiency improvements to enable larger proofs with lower memory usage, through on-the-fly folding coefficient computation and targeted refactoring of the selector stage sumcheck. Changes preserve API/compatibility while reducing memory footprint and potentially enhancing throughput.

February 2025: Strengthened data integrity and backend reliability for stark-backend by enforcing deterministic DAG constraint ordering and simplifying the verification flow. Implementations ensure constraint indices are sorted during DAG construction, reducing nondeterminism and production issues.

Month 2024-11 focused on correctness, reliability, and developer velocity for the scroll-tech/ceno project. Delivered key fixes, enhanced zkVM testing capabilities, and modernized CI/CD to shorten feedback cycles. These changes reduce decoding errors, improve zk-proof reliability, and streamline future integration testing and releases.

October 2024 monthly summary focusing on feature delivery, bug fixes, and overall impact across two repositories: Lagrange-Labs/deep-prove and scroll-tech/ceno.