Vitalii Baskov enhanced the LedgerHQ/speculos repository by implementing multi-architecture Docker image builds and CI/CD improvements. He enabled support for both arm64 and amd64 architectures, introducing digest-based pushes and manifest creation to streamline artifact delivery. Using Shell and YAML within GitHub Actions workflows, Vitalii added an arm64 host builder to the CI pipeline, allowing builds on aarch64 runners for improved release parity and speed. He also refined image tagging and metadata handling, and introduced metadata prefetching to accelerate pull request validation. This work resulted in more reliable, faster CI pipelines and consistent Docker image delivery across multiple architectures.