HarnessSync
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Pre-alpha · Private testing

Your AI coding stack,
on every machine.

HarnessSync sets up Claude Code, Codex CLI, Cursor, Aider, and the supporting MCP servers in one click – then keeps your skills, slash commands, hooks, and prompts identical across every machine you sign in from.

Request beta access What it does

What HarnessSync is

01
Setup

One-click install

The desktop app installs the CLIs, MCP servers, editor extensions, and shared config you actually use – in the right order, with the right versions.

Sync

Cross-machine state

Skills, slash commands, hooks, prompts, and settings stay identical across your laptop, workstation, and remote box. Local-first, optionally cloud-synced.

Account

Backend, billing, Pro

This site is the control plane – account management, Stripe billing, and the Pro-tier cloud sync that keeps every machine in lockstep.

How it works

02
  1. 01

    Install the desktop app

    macOS, Windows, Linux. The app handles every CLI, MCP server, and editor extension for you – no shell scripts, no homebrew taps, no PATH surgery.

  2. 02

    Sign in once

    One account ties every machine together. Free tier is local-only; Pro adds encrypted cloud sync of your skills, prompts, and project settings.

  3. 03

    Work from anywhere

    New laptop? Install, sign in, you’re back where you left off – same tools, same skills, same prompts, same hooks. Nothing to re-learn.

Status

03

HarnessSync is in pre-alpha. The desktop app is in private testing with a small group of friends and engineers. Public beta opens later this year.

Request beta access /up · service health