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Code anywhere. Sync everywhere. Keep Claude Code, Codex, OpenCode, Pi, Kimi and DeepSeek Harness sessions in sync across your own network. Self-hosted, no account, no analytics telemetry.
I kept starting long agent runs, leaving the laptop, and finding out an hour later they'd stalled two minutes in on a permission prompt, or asking me a question.
Cosyncing is a self-hosted server that watches the coding agents already running on your machine and serves clients to your phone, desktop, and browser. Permission requests, agent questions, and finished runs all land in one inbox — answer from whatever device you're holding. Prompt from the app while the terminal keeps running; neither side drifts.
Works with Codex, OpenCode, Pi, Kimi Code, and DeepSeek Harness for full two-way sync; Claude Code is read-only until you take over. Runs over your own Tailscale network — no relay of mine in the path, no telemetry. Apache-2.0, free.
▎ npm install --global cosyncing → cosyncing setup → cosy pair.
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About cosyncing on Product Hunt
“Code anywhere. Sync everywhere.”
cosyncing was submitted on Product Hunt and earned 2 upvotes and 1 comments, placing #159 on the daily leaderboard. Code anywhere. Sync everywhere. Keep Claude Code, Codex, OpenCode, Pi, Kimi and DeepSeek Harness sessions in sync across your own network. Self-hosted, no account, no analytics telemetry.
cosyncing was featured in Productivity (659.9k followers), Developer Tools (518.8k followers), Artificial Intelligence (477.8k followers) and GitHub (41.4k followers) on Product Hunt. Together, these topics include over 387.4k products, making this a competitive space to launch in.
Who hunted cosyncing ?
cosyncing was hunted by Jingbiao Mei. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
Want to see how cosyncing stacked up against nearby launches in real time? Check out the live launch dashboard for upvote speed charts, proximity comparisons, and more analytics.
Jingbiao Mei