Show HN: A lightweight way to make agents talk without paying for API usage

In Cursor or OpenCode is very easy, just change the LLM in the same conversation.

Claude Code (subscription) has Agent Teams built in. Teams of Agents communicate with local files that they use as inboxes and task list. Has tmux and iTerm 2 integration. https://code.claude.com/docs/en/agent-teams

They can rack up some extra tokens if you leave agents going idle. Because they loop, checking for new messages for them.

This fellow reverse-engineered exactly how it works and then abstracted the pattern into an MCP server that any Harness/agent can use. https://github.com/cs50victor/claude-code-teams-mcp

Have you seen https://www.roborev.io/ from Wes McKinney?

I put together a skill to do this with OpenCode and the GitHub Copilot provider. Works pretty well.

I’ve been keeping them open in tmux and using either send_keys or paste buffer for communication. Using print mode and always resume last means you can’t have parallel systems going.