Privacy Policy

PRECC is local-first. It runs entirely on your machine as a Claude Code / Cowork hook, and it sends nothing about your work anywhere unless you explicitly opt in to anonymous telemetry. This page explains exactly what is and is not collected.

Your data stays on your machine

Everything PRECC needs lives locally. Command history, mined skills, and metrics are stored in databases under ~/.local/share/precc/ and are encrypted at rest with AES-256. The hook inspects and rewrites your bash commands locally, before they run — the command text, its output, your file paths, and your project contents are never transmitted off the machine.

Anonymous telemetry (opt-in)

Telemetry is off by default and only sends data after you run precc telemetry consent. When enabled, it sends a small, anonymous, aggregate payload to populate the public stats on precc.cc: PRECC version, OS and architecture, counts (commands intercepted, skills activated, advisories fired), average hook latency, and a stable anonymous machine/user hash used only to de-duplicate reports. See the Telemetry page for the exact payload and precc telemetry preview to inspect what would be sent.

What is never collected

PRECC never sends — with or without consent — your command text, command output, file paths, file contents, project or directory names, environment variables, usernames, email addresses, or IP-derived location. The telemetry payload carries only aggregate counters and the anonymous hashes described above.

How to opt out

Telemetry requires opt-in, so doing nothing already means nothing is sent. If you previously enabled it, revoke consent at any time, or disable it unconditionally for a shell with an environment variable:

precc telemetry revoke        # turn it off
export PRECC_NO_TELEMETRY=1    # or disable per shell, unconditionally

Third parties

There are no advertising networks, analytics SDKs, or data brokers. The only destination for opt-in telemetry is PRECC’s own stats endpoint at peria.ai / precc.cc. Your data is never sold or shared, and aggregated counts are published openly on precc.cc.

Contact

Questions about this policy or your data: open an issue at github.com/peri-a-i/precc-cc or email yijun.yu@open.ac.uk. PRECC is open-source, so you can audit exactly what it collects.

Last updated: 2026-06-11