Developed the JSONL Session Replay and Load feature for the zed-industries/claude-code-acp repository, enabling seamless session resumption and improved debugging workflows. This work involved implementing the loadSession function in TypeScript and Node.js to stream and parse JSONL entries from persisted session files, accurately mapping user and assistant messages as well as tool calls into ACP session updates. The approach focused on robust session management, allowing for reliable replay of previous interactions. Comprehensive unit tests and documentation were added to ensure maintainability and clarity. The feature enhances incident investigation and reliability of session resumption within full stack development contexts.