Install the helper

macOS and Linux, on Intel/AMD and ARM. The helper is one static binary with no dependencies.

curl -fsSL https://beckoncli.com/install.sh | sh

The script:

• detects your OS and CPU and downloads the matching release from GitHub;
• verifies its SHA-256 checksum, and the checksum file's signature as well if cosign is installed, and stops on any mismatch;
• installs to ~/.local/bin without sudo, and tells you if that directory is not on your PATH.

You can read it first at /install.sh. To pin a version: BECKON_VERSION=v0.7.0 before sh.

Verify by hand

Every release lists checksums.txt with a keyless cosign signature (checksums.txt.sig and checksums.txt.pem) made by the release workflow. Details.

Then

beckon login
beckon doctor
beckon run -- claude