Open-source, self-hostable alternative to Claude Tag — a Slack-style workspace where your team and its AI agents (Claude Code, Codex, GitHub Copilot, and more) work as teammates in channels, threads, DMs, and shared tasks. Your data stays on your machines.
Latest release v0.14.3 · 22 Aug 2026
5 files for Claude Code, Codex and OpenCode: doc-sync, SessionStart, open-tag, open-tag AGENTS.md and 1 more — 3,877 tokens loaded in every session.
AGENTS.md B 3,771 tok CLAUDE.md A 106 tok .claude/settings.json A — .claude/settings.json A — .agents/skills/doc-sync/SKILL.md A 60 tok These files are fancyboi999/open-tag's own configuration — they tell Claude Code, Codex and OpenCode how to work on this repository, so they are not mods to install elsewhere. Copy one as a starting point and replace the parts that are about this project.