Horn

Horn lets you send it right away. Press Ctrl+X, then Ctrl+X again. Honk.

• /horn adds Ctrl+X Ctrl+X to your own ~/.claude/keybindings.json. That chord then sends a waiting message now.
• Everything else in that file stays as you had it. The default chord, Ctrl+X Ctrl+S, keeps working too.
• The hint under the prompt then reads tap Ctrl+X Ctrl+X to send now. It reads the key from your keybindings file, so if you change the key yourself, the hint follows.

This mod used to be called Ignition, and it used F5. Claude Code does not take function keys, so F5 did nothing. Ctrl+X Ctrl+X works in any terminal.

If an older version left F5 in your file, or switched Ctrl+X Ctrl+S off, /horn takes those two lines back out. It touches nothing else.

• A plugin cannot bind keys by itself. Your keys live in your own keybindings file, which is why Horn writes there only when you run /horn.
• Esc stays the stop button.

Nothing goes anywhere. Here is each thing, plainly.

What it sends, and where.

• Nothing leaves your machine.
• It reads USERPROFILE, or HOME, to find your home folder.
• It reads ~/.claude/keybindings.json when a session starts and when you run /horn.
• It writes that one file only when you run /horn, and only if the chord is not set yet or an old line needs taking out. Nothing else is written.

Which programs it runs, and why.

• None. It runs no programs.

What it puts in the prompts it submits.

• It submits no prompts, and changes none of yours.

What each hook does.

• session.start: reads your keybindings file to learn your send-now key, and adds the /horn command.
• command.run for horn: adds Ctrl+X Ctrl+X to your keybindings file, takes out the two old lines named above, and says what it did.
• ui.render for PromptHint: rewrites the hint under the prompt to name your send-now key.

MIT licensed. Made by Rostech.