May 2026 monthly summary for ZcashFoundation/zebra. Focused on dependency modernization and CI stabilization to align Zebra with the 2026-04 release wave. Delivered a major feature upgrade and MSRV readiness improvements that reduce build risk and enable future upgrades. Key work was captured in commit 5aec7f5efe971baadd7c6ded1dd8e5eb8bbad931 with the following impact: - Migrated librustzcash crates to the 2026-04 release wave, replacing deprecated core2 with corez 0.1.1 and updating related tooling to clear RUSTSEC-2026-0105. - Adjusted MSRV for zebrad and tightened CI to resolve duplicate dependency issues, including pinning transitive dependencies to preserve workspace MSRV (1.85.1) while upgrading to newer minors (e.g., zebrad 1.91 for cargo-platform 0.3.3). - CI/style changes: updated lint/docke rbase, and added necessary skips for duplicate crates (console, hashbrown, toml, winnow) and refreshed cargo-vet exemptions. - Documentation and template updates to reflect dependency changes, MSRV rationale, and release notes guidance. Overall, these changes stabilize the build, maintain forward-compatibility with the 2026-04 cohort, and reduce risk in upcoming feature upgrades.

December 2024: Implemented enhanced SPIR-V atomic operation support in naga for ruffle-rs/wgpu, enabling OpAtomicCompareExchange and per-field atomics within global structs. This included frontend parsing, execution, error handling for non-scalar base types, WGSL code generation, and an expanded test suite to validate correctness and safety. The work improves shader atomics reliability, type safety, and broader hardware compatibility, enabling more robust graphics pipelines and safer concurrent shader execution.