For December 2025 (2025-12), the primary feature delivered was a targeted compatibility improvement for ValveSoftware/Proton: updating Wine Mono from 10.2.0 to 10.4.0 within the Makefile to ensure compatibility and access to the latest Mono fixes.

November 2025 work summary focusing on Proton and SDL with emphasis on reducing user friction, improving startup reliability, and enabling better display management across Windows.

September 2025: ValveSoftware/Proton delivered a stability-focused dependency upgrade by updating Wine Mono to 10.2.0 and removing an older WinForms accessibility workaround. The change enhances compatibility with WinForms features, unlocks upstream fixes, and reduces maintenance overhead from conditional workarounds, contributing to a more reliable user experience across Proton-enabled titles.

August 2025 monthly summary for ValveSoftware/Proton: Implemented a Direct3D 11 Rendering Compatibility Flag to improve game compatibility and performance for FNA-based titles by forcing the FNA3D driver to D3D11. Associated with CW-Bug-Id: #25045. This feature enhances stability and broadens the D3D11 rendering path support for a subset of games.

July 2025: Implemented a targeted bug fix in ValveSoftware/Proton to disable Xalia for Wuthering Waves (App ID 3513350). This prevents the gamepad UI for keyboard/mouse from activating, addressing CW-Bug-Id #25642. Delivered via commit 54c06cf938b9d87464bab08391288b40a9c42c4c. This change improves input reliability and UX for keyboard/mouse players, reduces support overhead for this title, and demonstrates careful, minimal-risk feature flag control.

June 2025 monthly summary for ValveSoftware/Proton: Delivered two high-impact changes that directly enhance gamer UX and stability, reinforcing Proton's compatibility and reliability in live deployments. Business value delivered: smoother input with Rockstar Games Launcher Installer and fewer crashes for Windows Forms apps, expanding supported scenarios and reducing support overhead.

May 2025 monthly summary for ValveSoftware/Proton focused on delivering SysLink integration with Xalia and strengthening build-time fixups. Implemented a fixup to main.gudl to enable SysLink support, and updated the build pipeline to automatically incorporate custom fixups, enhancing compatibility on SysLink-enabled systems and reducing integration risk for future deployments.

April 2025 monthly summary for ValveSoftware/Proton: focused on stability, compatibility, and maintainability. Delivered two key features aimed at future-proofing the project and improving cross-title reliability: - Dependency upgrades for stability: bumped Xalia from 0.4.5 to 0.4.6 and Wine Mono from 9.4.0 to 10.0.0 to enhance compatibility and security without introducing user-facing changes. - Xalia in 'Supported-Only' mode: updated Proton compatibility layer to run Xalia in a supported-only mode by enabling XALIA_SUPPORTED_ONLY when Xalia is not explicitly configured, refining usage and performance. Impact and traceability: - Improvements implemented via commits: e9e2a133624d9a75e8b4e6ed3340b35d9076de86 (Update Xalia to 0.4.6.), 4ce767516f665416582e0eff6fafc68a3c9a08d4 (Update Wine Mono to 10.0.0), c6894371e9d00c907154fe9dda376e415ffc1cf5 (proton: Run Xalia in supported only mode.). - Business value: reduced maintenance risk, improved cross-title stability, and prepared the codebase for upcoming dependency updates, enabling smoother user experiences and easier future upgrades.

December 2024 monthly summary for ValveSoftware/Proton focusing on Xalia-related work Key features delivered: - Xalia Unity3D Game Compatibility Expansion: Enabled Xalia compatibility for additional Unity3D launcher games by adding their Steam App IDs to configuration, expanding the supported catalog and improving user experience.

Month: 2024-11 — Focused on upgrading Wine Mono to 9.3.1 in Proton to enhance compatibility and stability for Windows applications and games. The change was implemented via a targeted Makefile.in update, tracked by commit ac1939f09ad330552e424bdb3b3512b6bcfb5296 ("Update Wine Mono to 9.3.1."). No major bugs fixed this month; primary value came from improved runtime compatibility and smoother user experiences. Technologies demonstrated include Makefile edits, version control discipline, and dependency management within ValveSoftware/Proton. Overall impact: improved game compatibility with modern Mono, reduced risk for regressions through a focused change.

Month: 2024-08 – Proton (ValveSoftware/Proton): Delivered Steam Application Compatibility Expansion via Xalia 0.4.4 update, increasing compatibility for additional Steam applications. Commit 8a74dee586669ddc00d7265e8554d7c73cd5313e. No major bug fixes were documented for this period. Overall impact: broader title compatibility, smoother user experiences, and stronger alignment with Steam’s ecosystem. Technologies/skills demonstrated: Xalia version management, dependency updates, release hygiene, and targeted QA for app compatibility.

Monthly summary for ValveSoftware/Proton - May 2022: Delivered a targeted workaround to improve startup/config reliability for IL-2 Sturmovik: Cliffs of Dover by copying the user's local configuration to ensure proper game functionality. This fix reduces startup failures and enhances user experience for Proton-enabled IL-2 Sturmovik, contributing to broader game compatibility and stability across Linux/ Proton environments.