Worked on the zed-industries/claude-code-acp repository to deliver TypeScript declaration generation and comprehensive packaging integration tests. Focused on enhancing build configuration by updating tsconfig.json declaration options and refining package.json to support proper main and deep import compatibility. Developed integration tests that validated the entire packaging flow, from build through npm pack and tarball installation to type-checking, ensuring type correctness across all exports. Emphasized type safety by verifying generic type shapes and rejecting incorrect usage at compile time. Utilized TypeScript, build configuration, and testing skills to improve downstream reliability and enable safer, more robust package distribution for consumers.