Worked on the apple/swift-nio repository to enhance error observability by implementing human-readable error descriptions for ChannelError and NIOConnectionError. This feature was delivered by adding CustomStringConvertible protocol conformance, allowing these error types to provide descriptive messages in logs and diagnostics. The approach focused on improving error handling and logging, making it easier to triage and diagnose production issues within NIO code paths. Using Swift, the changes targeted protocol conformance and robust logging practices. The work addressed a specific need for clearer diagnostics, resulting in more actionable log output and supporting faster incident response for teams using swift-nio.