I shipped an open-source workflow this week: a 4-agent adversarial code review team that runs on heym and exposes itself as an MCP server. Any coding agent (Cursor, Claude Code, Codex, custom Python, Antigravity) can call into it for a structured second-opinion review on its own output. MIT licensed. Fork it. The workflow is open source. It calls Ejentum's harness API for the cognitive scaffolds (free tier for experimentation, paid tier for ongoing use). Calling it "open" and ignoring that dependency would be dishonest, so I'm naming it up front. That sounds small. Look at where the field has landed. Git is the agent control loop now Karpathy's autoresearch uses Git as its whole control loop, committing changes and rolling back the ones that don't work. Claude Code's GitHub Action takes an issue and opens a PR. Codex Cloud is built on the same idea. The agent's job is now to produce a thing you can review the way you'd review a colleague's work. A branch. A diff. A pull request. Nobody had to design this.…