Cobalt

Developer

Sidekick

Answer coding-agent permission prompts from your Kobo. Needs your computer.

Version
1.0.15
Permissions
network
Requires
Cobalt 0.3.31
Install on your Kobo

Source code on GitHub

Sidekick showing several coding-agent sessions and their pending approvals.
Sidekick: A Claude Code question on a Kobo Clara BW
A Claude Code question on a Kobo Clara BW
Sidekick: Paired and watching for questions, on a Kobo Clara BW
Paired and watching for questions, on a Kobo Clara BW
Sidekick: Approving a command from Claude Code
Approving a command from Claude Code
Sidekick: Pairing with a computer
Pairing with a computer

New in 1.0.15

The address and pairing code are typed on Cobalt's own keyboard with a refused address explained under its field, and questions with several answers are ticked and sent from a bar that counts them.

App setup

Before you install

  1. Set up the reader once over USB, if you have not already. kobo setup
  2. Pair this computer with the reader. It writes the pairing for Sidekick, Deck and Paperterm onto the reader, so there is nothing to type there. The first time, close Cobalt and open it again afterwards. kobo sidekick init
  3. Let Claude Code ask through Sidekick. Use codex instead of claude for Codex. kobo sidekick setup claude
  4. Start the helper and leave it running, then open Sidekick on the reader. kobo sidekick run

Commands need the kobo command on macOS, Linux or Windows WSL. This installs it ready-built, without touching the reader: curl -fsSL https://bandarlabs.github.io/Cobalt/install.sh | sh -s -- --no-setup

New to Cobalt?

Install Cobalt from your browser

Plug your Kobo into this computer and install Cobalt in about a minute. After that, apps install over Wi-Fi.

Works in Chrome, Edge and Opera. Check your Kobo is supported.

Install Cobalt

Already have Cobalt?

Link your Kobo to install

On your Kobo, open App Store, tap the globe in the top bar and choose Link browser. Scan the QR code, or enter the pairing code and verification key.