September 2025: Implemented Rhythm Difficulty Adjustment for Doubletappable Objects in ppy/osu to refine the difficulty evaluation for a key gameplay mechanic. The change detects doubletappable objects, increases a tuning multiplier when applicable, and reduces the overall rhythm difficulty for those objects, resulting in smoother gameplay and more stable difficulty curves across maps with fast double-taps.

Summary for 2025-08: Focused on delivering a correctness improvement for Deflate mod rating calculation in ppy/osu, with a targeted change to reduce flashlight rating under Deflate by modeling the starting scale via clamped reverse linear interpolation. This work enhances the accuracy of difficulty assessments when the Deflate mod is active, improving player experience and ranking fairness. No other major bugs fixed in this period; the main accomplishment is the rating-calculation feature aligned with issue #34081.

July 2025 summary for ppy/osu: Delivered a critical rating calculation refinement by making visibility-based bonuses additive to ratingMultiplier. This refactor, focused on balance for longer maps with high AR and the Hidden mod, reduces rating skew and improves predictability for players, supporting fair competition and retention. The work was implemented via commit 83765abe34da7f0e980dea3e3de6fceeeb88afe4, aligning with existing rating pipeline and maintainability goals. No major bug fixes were identified in this period; primary effort centered on feature delivery and code quality improvements. Technologies/skills demonstrated include refactoring for numerical stability, controlled feature changes within rating calculations, and end-to-end traceability through commit history.

June 2025 — Focused on balancing core gameplay and elevating beatmap UI to align with the web experience. Delivered two major features with concrete, deployable changes: (1) Improve Aim Difficulty Scoring and Balance: decoupled velocity change bonus from wide angle bonus; switch distance ratio to smoothstep; refine aim strain; adjust bonuses for sliders/repetitive angles. Commits: 699fbb1a85eb986f8a4803e67f5e624802a1b7ea; 87023b22ea84c2635c8d52d7bcddcdd394bae473; (2) Beatmap UI Enhancements: Video Indicators and Overlay Icons: add video badge, align BeatmapPicker visuals with web, introduce IconPills with storyboard icon. Commits: 9b7c722d975624941be8c48d08dbe246dec5b1d1; 3e3d984584c84fface7cb32cdf25b6b6e2797358; 25eb9914a437dbb09a5b2246eb11b7f95ab56e87. These changes improve game balance and content discovery, while delivering UI consistency and a more polished player experience. Impact: higher engagement, easier discovery of multimedia beatmaps, and better cross-platform parity. Skills: algorithm tuning, UI/UX parity, cross-repo collaboration, maintainability.

Monthly summary for May 2025 focused on delivering feature work in osu! with magnetised mod support for difficulty calculation. The month centered on enhancing the diffcalc engine to account for magnetised mod interactions and to refine accuracy-based ratings, ensuring map difficulties align with player expectations when magnetised mods are active. No major bugs fixed this period; the focus was on delivering robust feature work and maintaining code quality across the repository.

Monthly performance summary for 2025-04 focusing on delivered features, major fixes, impact, and technical growth.

March 2025 performance-focused delivery for ppy/osu. Implemented Beatmap Difficulty Calculation Benchmarking Across All Game Modes, introducing archival data loading and repeated calculation tests to measure performance, reliability, and scalability of beatmap difficulty calculations across Osu, Taiko, Catch, and Mania. This work establishes a baseline for optimization, reliability, and capacity planning, enabling data-driven improvements to user-perceived responsiveness.

January 2025 monthly summary focusing on key accomplishments for the ppy/osu repository. The work centers on delivering a robust scoring and difficulty framework, enhancing fairness and maintainability, and enabling faster future iteration through targeted code-quality improvements.

December 2024: Delivered key difficulty recalibration improvements and a compatibility-focused Relax mod fix for ppy/osu. Highlights include refactoring aim difficulty to introduce a wiggle bonus and acute-angle adjustments, plus a new AimDifficultSliderCount metric and updated slider drop penalty logic (commits f722f94f26f0055f7a68bb867b60600aff6bac81; 6808a5a77cffdb5800fc6443823bcad80283f549). Also fixed OsuModRelax hit leniency to match stable with added tests (commit 94d56d3584c8c1021e11d00a71469d90bc4991b6). These changes enhance high-BPM stream accuracy, provide more precise overall difficulty estimation, and ensure consistent gameplay across versions.

Month: 2024-11 — Focused on delivering high-value features, improving localization and documentation quality, and enhancing core calculation logic and UI density. Key features delivered across repositories include: 1) osu-wiki: Osu!taiko Performance Points Committee Page Update and Translations — updated member information, join/leave dates, and reorganized sections for different modes in Traditional Chinese, bringing translations closer to the original. 2) osu-wiki: Documentation Table Alignment Fix — resolved a minor formatting issue by correcting whitespace to ensure consistent table formatting. 3) osu: Difficulty Calculation System Refactor and Enhancement — introduced a centralized DifficultyCalculationUtils for BPM conversion and the logistic curve, updated constants and function signatures to improve precision and reuse across game modes. 4) osu: UI: Compact Beatmap Card Display — reduced the UI footprint of beatmap cards in profile-related views by scaling down cards to improve information density without changing core functionality.

2024-10 monthly summary for ppy/osu: Fixed UI overflow in UserRankPanel for six-digit (and larger) ranks, with padding updates and added tests to validate large rank handling. The change reduces visual glitches and support issues around high ranks, and reinforces UI consistency for the ranking panel. Key commit: 86989aa5ce8f835f03f3c8bb923346bf2456a6b6.