January 2026 monthly summary for flutter/flutter focused on expanding cross-architecture support by delivering RISC-V Desktop Linux support in the Flutter Tool for riscv64. This feature enables building and running desktop Linux Flutter apps on RISC-V hardware and supports community-hosted engines/artifacts for the riscv64 pathway. The work aligns with upstream engine build initiatives and lays the groundwork for addressing broader RISC-V integration goals (e.g., issue #99963). Key collaboration included upstream PRs that enable engine builds for riscv64 (PRs #178711 and #178712), establishing an end-to-end workflow from the Flutter tool to a hosted engine. The effort also demonstrates the ability to coordinate toolchain work with upstream dependencies to broaden Flutter’s platform coverage. Pre-launch and quality signals show adherence to contributor guidelines (CLA signed, Tree Hygiene followed, Flutter Style Guide observed). Several items remain in the PR checklist (docs updates and tests) as this work centers on enabling the capability and the first run on hardware rather than complete feature parity. Overall impact: expands Flutter’s platform reach to RISC-V Linux desktops, enabling internal teams and the community to build and run Flutter apps on riscv64 hardware, reducing platform fragmentation and enabling experimentation with alternative architectures. This lays a foundation for scalable RISC-V support in production workflows and demonstrates the capability to align tooling with upstream engine delivery. Technologies/skills demonstrated: Flutter tool internals and cross-arch packaging, Linux desktop builds, riscv64 toolchain adjustments, upstream collaboration and PR hygiene, community-driven artifact hosting concepts, and end-to-end workflow coupling between tool and engine builds.