[BUG] Slack CLI Windows powershell installer version error

[Ghostboo124]

Description

On line 109 of the Windows .ps1 installer, when it sets the SLACK_CLI_VERSION variable, it indexes the version by zero which causes it to not take only the major version, which when it tries to download the Slack CLI it fails to retrieve the .zip file as the website returns a 403

Version

Please paste the output from:

PS> slack --version

4.47.69

OS Info

Please paste the output from:

CMD> ver

Microsoft Windows [Version 10.0.26220.7344]

Steps to reproduce:

Share the commands to run, source code, and project settings:

1. PS C:\Users\perkinsal> irm https://downloads.slack-edge.com/slack-cli/install-windows.ps1 | iex

Expected result:

(This uses a patched version of the script)

PS> .\install-slack.ps1 -Alias slack-cli
Hello and welcome! Now beginning to install the...
      ________ _     _    _____ _    __    _____ _    ________
     /  ______/ |   / \ /  ____/ | /  /  /  ____/ | /___   __/
    /______  |  |  / _ \  |   |      /   | |   |  |    |  |
     ____ /  |  |___ __ \ |____  |\  \   | |____  |__ _|  |___
   /_______ /|______/  \_\ ____/_| \__\    _____/______/_____/

Finding the latest Slack CLI release version
Downloading Slack CLI v3.10.0...
Extracting the executable to:
   C:\Users\perkinsal\AppData\Local\slack-cli\bin\slack-cli.exe
Adding `slack-cli.exe` to your Path environment variable

Adding developer tooling for an enhanced experience...
Skipping the check for a Git installation!
Sweet! You're all set to start developing!

Use of the Slack CLI should comply with the Slack API Terms of Service:
   https://slack.com/terms-of-service/api

We would love to know how things are going. Really. All of it.
   Survey your development experience with `slack-cli feedback`

You're all set! Relaunch your terminal to ensure changes take effect.
   Then, authorize your CLI in your workspace with `slack-cli login`.

Actual result:

PS> irm https://downloads.slack-edge.com/slack-cli/install-windows.ps1 | iex
Hello and welcome! Now beginning to install the...
      ________ _     _    _____ _    __    _____ _    ________
     /  ______/ |   / \ /  ____/ | /  /  /  ____/ | /___   __/
    /______  |  |  / _ \  |   |      /   | |   |  |    |  |
     ____ /  |  |___ __ \ |____  |\  \   | |____  |__ _|  |___
   /_______ /|______/  \_\ ____/_| \__\    _____/______/_____/

Finding the latest Slack CLI release version
Downloading Slack CLI v3...
install_slack_cli:
Line |
 257 |  install_slack_cli $Alias $Version
     |  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     | Installer cannot download Slack CLI

We would love to know how things are going. Really. All of it.
Submit installation issues: https://github.com/slackapi/slack-cli/issues

Requirements

• I've read and understood the Contributing guidelines and have done my best effort to follow them.
• I've read and agree to the Code of Conduct.
• I've searched for any related issues and avoided creating a duplicate issue.

[zimeg]

👋 Hey @Ghostboo124! Thank you so much for reporting this 🎁 ✨

I can confirm this happens with the current version metadata, which might've changed in the number of entries kept:

{
  "slack-cli": {
    "title": "Slack CLI",
    "description": "CLI for creating, building, and deploying Slack apps.",
    "releases": [
      {
        "version": "3.10.0",
        "release_date": "2025-12-04"
      }
    ]
  }
}

🔗 http://docs.slack.dev/tools/metadata.json

We now have #297 open to address this and will look into updating the script soon 🫡

[zimeg]

🚀 We've merged a fix as part of #297 and the change should be live now! Apologies for the hiccups in this installation 🤖

We're now exploring testing this installation in CI as follow up, but I'm having trouble with this script in GitHub Actions for some reason. I left a few comments from related attempts, but insights are so appreciated if known! 🔍

Thanks too again for sharing this finding! Please feel free to write in whenever if other edges appear 👾