Connection Setup

Sigil needs to talk to two things to do its job:

• Your Chrome browser — so Sigil can drive the page on your behalf.
• Your AI agents (Claude Code, Cursor, ChatGPT, etc.) — so they can send commands to Sigil.

The first time you launch Sigil, a setup wizard opens automatically and walks you through both connections. For most users, that’s all you need.

Manual Setup

If you skipped the wizard or need to reconnect later, you can wire things up by hand.

Enable remote debugging in Chrome

Sigil controls Chrome over its built-in debugging protocol, which is off by default.

Requires Chrome 144 or later. Earlier versions do not expose the toggle below — update Chrome first by going to chrome://settings/help.

1. Open Chrome and go to chrome://inspect/#remote-debugging.
2. Check the box to enable remote debugging.