Cannot update from a version like 1.2.10 to 1.2.1, "already on version"

[cflee]

Describe the bug
When on a version like 1.2.10, cannot update to 1.2.1.

To Reproduce
Steps to reproduce the behavior:

1. Have an CLI version like 1.2.10-gitsha installed
2. Run the command update --version 1.2.1
3. An error results: <cli name>: Updating CLI... already on version 1.2.10-gitsha

Expected behavior
Update runs to version 1.2.1

Screenshots
<cli name>: Updating CLI... already on version <current version>

Environment (please complete the following information):

• OS & version: macOS 26.6.1
• Shell/terminal & version zsh 5.9 (arm64-apple-darwin25.0)

Additional context
I think this is due to all the .startsWith(version) happening in the implementation, so maybe this could affect all stringwise prefixes, including prerelease or other channel versions like 1.2.0-alpha to 1.2.0?

[jfeingold35]

@cflee , interesting, I'll see if we can reproduce this, and if so then I'll log it and we'll prioritize it on the backlog appropriately.