Zephyrus 0.1.1 (pre-release)

Windows installer for Zephyrus, the Chromium browser with Zep, a built-in agent that does web tasks for you.

Install

1. Download Zephyrus-Setup-2026-10-30.exe below and run it.
2. The installer is not code-signed yet, so Windows SmartScreen shows "Unknown publisher". Choose More info, then Run anyway.
3. Zep needs your own model API key. Add it in the agent panel's settings; it is stored encrypted with the OS keystore.

SHA-256: AEB8C1EBB31C19F983B2E6BC360E55913ECB554EE24DD4360F1142FD1EA5CAD3

What is new

• Cloud agent: prompt and tool descriptions rewritten. Model replies that wrote a tool call as plain text fell from 22% to 0% on the benchmark; 37 of 37 benchmark tasks pass.
• Safety kernel: URLs are read the way Chromium reads them, non-web schemes are denied, more payment controls are recognised, and the "which one did you mean?" question no longer fires when clicking into one part of a date.
• Network: requests that carry page content or a key never follow redirects.
• Glance link previews, compact mode, the lens mascot skin, the Zep Search engine and the new first-run onboarding.

Known issues

• Not code-signed, no auto-updater, and the Chromium base (151) is past its support window.
• Chromium's installer skips installing over the same version number without saying so. Uninstall an older Zephyrus build first.
• One long agent task (finding a manager's extension in a staff directory) still fails about one run in three.
• Voice Lock is a lightweight matcher, not biometric security.

Source and build instructions: see the README.