Anthropic has launched Claude Tag, revamping its approach to workplace collaboration by turning Claude into a persistent, multi-step AI teammate living inside Slack. Instead of acting like a traditional Q&A chatbot, Claude Tag operates as a shared virtual employee that can build long-term organizational context, handle tasks asynchronously over days, and take initiative in "ambient" mode. The core architecture shifts the AI experience into a collaborative, multiplayer environment powered by Claude 3.5 Opus. When added to a Slack channel, there is a single instance of @Claude that everyone interacts with, and it follows along with channel discussions over time to build tacit knowledge. Users can delegate complex, multi-day tasks, and Claude will break the project down into individual steps, post a visible checklist, and execute the work independently in the background. Ambient Mode allows Claude Tag to act proactively, monitoring channels to flag relevant information, follow up on critical discussion threads, and generate scheduled summaries automatically. To address security hurdles, Anthropic built a framework called Agent Identity, where Claude Tag operates via its own dedicated, audited service account, and system administrators explicitly dictate which tools, codebases, and channels each unique Claude identity can see.