David Iach worked on the openclaw/openclaw repository, focusing on enhancing the security and efficiency of Slack integration features. He implemented backend improvements using Node.js and TypeScript, introducing strict validation for Slack file URLs to prevent token leakage and capping media download sizes to reduce exposure risk. His approach enforced tighter host and protocol checks, refined system prompt overrides, and set maximum byte limits on raw URL fetches, all aimed at strengthening security and optimizing resource usage. David’s work demonstrated depth in API integration and backend security, addressing compliance needs and improving the overall safety of Slack-driven workflows.