Worked on the anthropics/claude-agent-sdk-python repository to deliver a configurable timeout feature for the Query initialization process, addressing the need to support slower MCP server startups without causing query failures. The solution introduced an environment variable, CLAUDE_CODE_STREAM_CLOSE_TIMEOUT, allowing users to override the default 60-second timeout in milliseconds, thereby enhancing reliability in production environments. This feature was implemented using Python and focused on robust configuration management and backend development practices. The approach maintained backward compatibility and minimized surface changes, demonstrating careful attention to integration stability and environment-driven configuration patterns. No major bugs were fixed during this period.