claudenv upgrade

Upgrade claudenv to a specific release or the latest version.

Usage

claudenv upgrade latest       # latest GitHub release
claudenv upgrade v1.2.3       # specific version tag

What it does

1. Downloads claudenv.sh from the specified GitHub release
2. Verifies the SHA256 checksum against SHA256SUMS (if available for that release)
3. Backs up the current claudenv.sh to claudenv.sh.bak
4. Replaces ~/.claudenv/claudenv.sh with the new version
5. Writes the version tag to ~/.claudenv/version

After upgrading, reload your shell to apply the update:

source ~/.claudenv/claudenv.sh

Requirements

curl or wget must be available (both ship with macOS).