Most apps ask you to trust their privacy policy. Yuki is built so we can't see your data in the first place — and so you can verify that yourself.
Your code, prompts, and files never leave your machine. The only thing Yuki shares between your devices is your agent's status — and even that travels through your own network or your own iCloud, never through us.
Everything you actually work on — your code, your prompts, your files, your terminal output, the names of your projects — stays on your machine. To tell whether your agent is busy, waiting, or idle, the Helper reads its activity locally on your Mac and derives just that coarse status. It never sends, stores, or shows your code, prompts, file contents, commands, or output.
When your agent's state changes, Yuki sends a tiny status update to your other devices. There are two paths, and both are private:
Every update is the same tiny payload — these six fields, and nothing else:
| Field | What it is |
|---|---|
| state | working · waiting · idle · done · error |
| activity | a coarse label — reading · writing · running · planning · thinking (or none) |
| agent | which tool — claude-code or codex |
| sessionId | an opaque id (e.g. "helper") — not a name or path |
| timestamp | when the state changed |
| id | a random per-event identifier — carries nothing of yours |
That is the whole payload. No code. No prompts. No file names or contents. No command text. No output. Ever.
Your private iCloud also holds one housekeeping record: a random pairing key the Helper generates so your own devices can connect without typing anything. It contains nothing about you or your work, and — like everything else — never leaves your iCloud account.
Two small conveniences, both visible and both reversible: the Helper starts at login, so the sensor is already running when you sit down to code; and it asks Claude Code to send it a tiny local ping when your agent stops and waits for you — the one moment that never shows up in the logs it reads. Everything involved stays on your Mac. The menu bar turns each off, and Uninstall removes both completely.
The Mac Helper is open source. You can read exactly what it sees and sends before you ever run it:
Because we collect nothing, Yuki's App Store privacy label is “Data Not Collected.”
Privacy questions: [email protected]. If you're a developer, the technical version of this page lives in the Helper repo.