Show HN: Open Tag, the open source Claude Tag

Category: ai-ml

Tags: ai-agent, slack-bot, open-source

Score: 7.0/10 (Innovation: 6, Technical: 7, Documentation: 8, Utility: 7)

OpenTag is an open-source alternative to Claude in Slack, letting users run self-hosted AI agents that read threads, answer queries, call custom tools, and render rich results inline. It is built on CopilotKit's bot SDK and supports multiple chat platforms, offering a hackable, MIT-licensed foundation with generative UI and human-in-the-loop capabilities.

Target audience: backend devs

Repository: https://github.com/CopilotKit/OpenTag · TypeScript · MIT · 126 stars

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