Show HN: Harness – Manage parallel Claude Code agents across Git worktrees

Category: devtools

Tags: multi-agent, git-worktrees, claude-code, developer-tools, electron-app, ai-coding

Score: 6.3/10 (Innovation: 6, Technical: 6, Documentation: 7, Utility: 6)

Harness is a desktop app for managing multiple parallel Claude Code (and Codex) agents across Git worktrees, providing a unified interface for multi-agent development. It fills a niche for developers who want to run several AI coding assistants simultaneously without workflow chaos, and its MCP integration allows Claude to control worktrees itself.

Target audience: backend devs

Repository: https://github.com/frenchie4111/harness · TypeScript · MIT · 12 stars

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