Managed Deep Agents 0.9 adds a reactions API for Slack channels

LangChain announced the Slack-channel reactions API for Managed Deep Agents 0.9. An accompanying article argues that loading states and task acknowledgments help users understand what long-running agents are doing. It describes assigning emojis based on message context, including an example that falls back to 👀 when a decision model is less than 25% confident in its top pick.