In February 2026, Ivan Karostsin focused on enhancing the reliability of JetBrainsRuntime by addressing a critical bug in the RISC-V instruction cache flush path. He corrected the argument handling in the RiscvFlushIcache::flush function, ensuring accurate calculation of the end address and proper cache flushing for RISC-V targets. Working primarily in C++ and leveraging his expertise in low-level and system programming, Ivan improved runtime correctness and stability, reducing the risk of stale or mis-executed code. His precise commit messaging and thorough documentation contributed to better code traceability and maintainability within the JetBrains/JetBrainsRuntime repository during this period.