Duplicated cask/formula?

[cblecker]

Output of brew config

HOMEBREW_VERSION: 5.0.14-59-g45db1ce
ORIGIN: https://github.com/Homebrew/brew
HEAD: 45db1ce2ebbf2fcb08ab91652e884e8df8e0f248
Last commit: 4 days ago
Branch: main
Core tap HEAD: d2da78d90ba0a066f227fddb891968aba8cf6ca2
Core tap last commit: 46 minutes ago
Core tap JSON: 19 Feb 23:34 UTC
Core cask tap HEAD: ae3e5d81218e8c5502eebb2edc6b9381c076e5b5
Core cask tap last commit: 20 minutes ago
Core cask tap JSON: 19 Feb 23:34 UTC
HOMEBREW_PREFIX: /opt/homebrew
HOMEBREW_API_AUTO_UPDATE_SECS: 300
HOMEBREW_AUTO_UPDATE_SECS: 300
HOMEBREW_CASK_OPTS: []
HOMEBREW_CLEANUP_PERIODIC_FULL_DAYS: 1
HOMEBREW_DEVELOPER: set
HOMEBREW_DOWNLOAD_CONCURRENCY: 32
HOMEBREW_GITHUB_API_TOKEN: set
HOMEBREW_MAKE_JOBS: 16
HOMEBREW_NO_ENV_HINTS: set
HOMEBREW_SORBET_RUNTIME: set
Homebrew Ruby: 3.4.8 => /opt/homebrew/Library/Homebrew/vendor/portable-ruby/3.4.8/bin/ruby
CPU: 16-core 64-bit arm_brava
Clang: 17.0.0 build 1700
Git: 2.53.0 => /opt/homebrew/bin/git
Curl: 8.7.1 => /usr/bin/curl
macOS: 26.3-arm64
CLT: 26.2.0.0.1.1764812424
Xcode: N/A
Rosetta 2: false

Output of brew doctor

Your system is ready to brew.

Description of issue

What is the right way to deprecate a cask that is duplicated by a formula? openshift-client is a cask that is duplicated by the openshift-cli formula

$ brew info openshift-{cli,client}
==> openshift-cli ✔: stable 4.21.1 (bottled), HEAD
OpenShift command-line interface tools
https://www.openshift.com/
Installed
/opt/homebrew/Cellar/openshift-cli/4.21.1 (10 files, 164.9MB) *
  Poured from bottle using the formulae.brew.sh API on 2026-02-17 at 10:33:50
From: https://github.com/Homebrew/homebrew-core/blob/HEAD/Formula/o/openshift-cli.rb
License: Apache-2.0
==> Dependencies
Build: go ✔
==> Options
--HEAD
        Install HEAD version
==> Analytics
install: 4,678 (30 days), 11,310 (90 days), 53,411 (365 days)
install-on-request: 4,669 (30 days), 11,294 (90 days), 53,330 (365 days)
build-error: 1 (30 days)

==> openshift-client ✘: 4.21.3
https://www.openshift.com/
Deprecated because it does not pass the macOS Gatekeeper check! It will be disabled on 2026-09-01.
Not installed
From: https://github.com/Homebrew/homebrew-cask/blob/HEAD/Casks/o/openshift-client.rb
==> Name
Openshift Client
==> Description
Red Hat OpenShift Container Platform command-line client
==> Artifacts
oc (Binary)
==> Analytics
install: 32 (30 days), 119 (90 days), 732 (365 days)

Relevant casks

openshift-client

[p-linnane]

openshift-client is already deprecated and will be disabled on 2026-09-01.

[cho-m]

An alternative to current deprecation is to use a tap migration to redirect all users to formula instead. You can see the commit history of https://github.com/Homebrew/homebrew-cask/blob/main/tap_migrations.json for examples on this.