Worked on enhancing the instruction tokenizer in the JetBrains/compose-hot-reload repository, focusing on expanding opcode support and improving reliability. Implemented support for BIPUSH and SIPUSH opcodes by integrating IntInsnNode, which addressed edge cases in hot-reload tokenization and resolved a known robustness issue. Developed targeted unit tests to verify correct tokenization of StartRestartGroup with small numeric keys, ensuring the new opcodes were handled accurately. Utilized Java and Kotlin for compiler development and JVM bytecode analysis, contributing to a more robust hot-reload pipeline. The work deepened opcode coverage and strengthened the test suite, reducing failures in complex development scenarios.