Harness 100 is an open-source catalog of 100 pre-built agent team workflows (harnesses) for Claude Code CLI. Each harness combines specialized AI agents and skills into a ready to use team from design systems and test automation to open-source launch pipelines. Browse, preview, customize, and install any harness with a single CLI command. No signup required. Key features: - One-click install via Claude Code CLI - Compose your own harness from 60+ agents and skills