24:I[50237,["/_next/static/chunks/0db4v-xi1q-jq.js","/_next/static/chunks/02-tqo9.1..63.js","/_next/static/chunks/0d3shmwh5_nmn.js","/_next/static/chunks/12wcqrolhhiqu.js"],"Posts"] 25:T4ad,Hey HN,

There’s been a lot of interest recently in meta-harnesses, loops, and multi-agent orchestration. Obviously, there are already a lot of good tools: Conductor, cmux, the native Codex / Claude Code apps, etc.

For my own use cases, I’ve felt that the orchestration layer tends to feel overengineered. I mostly wanted a simple local harness (i.e Pi) for running and tracking CLI agents with the ability to hop in (via tmux). Relaymux is my opinionated attempt at that.

A few design principles:

- The frontend is just Telegram / iMessage / CLI. If I want more visibility, I hop into tmux.

- Subagents are normal interactive CLI agents running in tmux windows, usually with their own worktrees.

- The harness owns the tmux session, so each longer task becomes a named tab/window. Subagents report back to the orchestrator via CLI when they’re blocked or done. Then the orchestrator just messages me on Telegram / iMessage

- It works with any CLI agent that has an interactive terminal mode, so I don’t need special print-mode/non-interactive support. This means I don’t need to stress about the Agent SDK / claude -p billing limitations.26:T47e,I built this tool for myself, and the URL in this post points to it. I needed a secure way to store my environment variables because I work on many projects across multiple devices. Keeping each variable up‑to‑date on every device was a constant hassle.

Now everything lives in a local file that I can pull and push with a simple CLI command. I never have to think about it again.

The tool is also useful when you’re hiring freelancers who need access to staging or local environment variables for testing. Instead of handing over an entire .env file, only to have it linger for months and expose keys and passwords, you can share just the specific file or variable you want (e.g., only the database URL, not the password). When you need to rotate or change anything, press the sync button and the tool updates all environments automatically.

I use it daily and rarely log in just to edit a variable or .env key; a single click does the job.

If you work with multiple projects, devices, or freelancers, give it a try. I spent a lot of time securing and encrypting the secrets so they can’t be leaked. I’d love to hear your feedback.

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