Tern is a free closed-source Mac-native (CLI/TUI also on Linux) control plane for 16 coding-agent CLIs: each task gets its own git worktree/branch, changes land in one review queue with comments routed back to the agent, conflict radar, multi-step runs with gates, phone approvals without Tern servers, and a daemon that keeps agents alive after you close the window.
AGPL self-hostable workspace runs Claude Code, Codex, OpenCode or Pi in isolated sandboxes; hand off from Slack/web/API, attach playbooks/skills/knowledge, approve sensitive actions, and get PRs or files back—positioned as an open Devin alternative.
Apache-2.0 Paseo runs Claude Code, Codex, Copilot, OpenCode, Pi, Antigravity, and Muse Code in isolated worktrees from desktop, native mobile, or remote hosts—with MCP/CLI/SDK automation, plugins, and optional E2E-encrypted relay so you steer agents without changing their subscriptions.
US lab Reflection open-sourced Beam (501B MoE / 23B active, 1M context, Apache 2.0) for coding and long-horizon agents, with day-0 vLLM/SGLang/Transformers support, Mirror CLI harness, and 40+ inference partners including OpenRouter and Ollama.
AWS Labs open-source (5k+★): one harness-neutral core turns Claude Code/Codex/Cursor/Copilot/Kiro/opencode into structured, verifiable delivery workflows via `aidlc config --harness` + doctor—install script, not a new agent.
SDK + stdio MCP server run agent()/parallel()/pipeline() scripts that fan out to Claude Code, Codex, OpenCode, or pi via ACP, with journaling, resume, and git-worktree isolation.
macOS menu-bar app that finds npm/dev servers and daemons started by Claude Code, Cursor, Codex, OpenCode, or T3 Code—including ghosts after the agent exited—and kills the process tree in one click.
MIT Tauri app runs Claude Code/Codex/OpenCode/Antigravity/Grok Build side-by-side with approvals and session resume; keep agents on the PC, then reconnect to the same live terminals from phone via your own relay/LAN/VPN.
MIT Claude Code plugin hands tasks to DeepSeek, Gemini (Antigravity), Codex, OpenCode or Copilot as worker CLIs—each in an isolated git worktree with your verify command—then returns a compact verdict/patch for Claude to review; API keys stay in a local browser form.
LiteLLM open-sourced Moyai—the Devin-like cloud agent they run in production: Slack/browser tasks get isolated cloud workspaces (terminal+FS+browser), run Codex/Claude Agent SDK/Hermes/OpenCode, open PRs, and attribute spend through your LiteLLM gateway (they estimate ~79% lower vs their Devin bill).