During April 2026, Locoholy focused on backend development for the ethereum/go-ethereum repository, addressing interoperability issues in the Ethclient RPC filter. Locoholy implemented a targeted bug fix to omit empty address and topics fields from RPC filter requests, enhancing compatibility with non-Geth Ethereum nodes. This change, written in Go and leveraging JSON serialization, prevented non-Geth nodes from rejecting requests containing empty address arrays. Locoholy also updated the test suite to cover scenarios with empty address slices, ensuring robust cross-client behavior. The work demonstrated a thoughtful approach to protocol compatibility and contributed to more reliable RPC communication across diverse Ethereum node implementations.