Launched in beta June 23, 2026 for Claude Team and Enterprise, Claude Tag evolved from Claude Code into a shared Slack teammate: one Claude per channel, ambient monitoring, async multi-day tasks, and sandboxed code execution via Claude Code Remote. Anthropic's CI team uses it as first-line on-call for pipeline failures — posting evidence-backed SITREPs from GitHub-hosted skills and a self-updating lessons.md log.