
Jittapan contributed to the rathena/rathena repository by developing a gacha-style NPC system called Kachua’s Secret Box, enabling players to exchange keys for random items and receive mileage coupons per pull. This feature required C++ development, item database management, and custom NPC scripting, including inventory checks and support for both single and multi-item exchanges. Jittapan also delivered a targeted performance optimization in the Skill Item List Window function, streamlining the code by removing redundant assignments to improve UI efficiency. Throughout both projects, Jittapan demonstrated careful code hygiene and maintainability, focusing on clear commit messaging and traceable, well-scoped changes.
December 2025 monthly summary (rathena/rathena): Focused on a targeted performance optimization in the Skill Item List Window function. Implemented a concise code cleanup by removing an unnecessary assignment of zero to a variable, which streamlined the function and reduced overhead in the UI path. This change is tracked in commit 7ad335fb62a99c9c5a5cd9fa739776f7d8c0ad3f (#9691).
December 2025 monthly summary (rathena/rathena): Focused on a targeted performance optimization in the Skill Item List Window function. Implemented a concise code cleanup by removing an unnecessary assignment of zero to a variable, which streamlined the function and reduced overhead in the UI path. This change is tracked in commit 7ad335fb62a99c9c5a5cd9fa739776f7d8c0ad3f (#9691).
February 2025 — Delivered a new engagement feature for rathena/rathena: Kachua's Secret Box NPC Gacha System. The feature enables players to exchange Kachua's Secret Key for random items via a gacha-style NPC, awarding a mileage coupon per pull. It supports single and multi-item exchanges, includes inventory space checks, and consumes items as needed. The update updates item database configs and adds a new NPC script, anchored by commit 74d6f61ea723805f87896ef755fd5bb686c97bd4.
February 2025 — Delivered a new engagement feature for rathena/rathena: Kachua's Secret Box NPC Gacha System. The feature enables players to exchange Kachua's Secret Key for random items via a gacha-style NPC, awarding a mileage coupon per pull. It supports single and multi-item exchanges, includes inventory space checks, and consumes items as needed. The update updates item database configs and adds a new NPC script, anchored by commit 74d6f61ea723805f87896ef755fd5bb686c97bd4.

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