diff --git a/.github/workflows/PR-powershell-lts.yml b/.github/workflows/PR-powershell-lts.yml
deleted file mode 100644
index de848fce..00000000
--- a/.github/workflows/PR-powershell-lts.yml
+++ /dev/null
@@ -1,81 +0,0 @@
-# Copyright (c) Microsoft Corporation.
-# Licensed under the MIT license.
-
-name: PowerShell LTS PR
-
-permissions: read-all
-
-on:
-  push:
-    paths:
-      - '.github/workflows/PR-powershell-lts.yml'
-      - 'Formula/powershell-lts.rb'
-    branches:
-      - master
-  pull_request:
-
-defaults:
-  run:
-    shell: pwsh
-env:
-  FORMULA_PATH: ./Formula/powershell-lts.rb
-  UPDATE_SCRIPT_PATH: ./scripts/Upgrade-Formula.ps1
-  FORMULA_NAME: powershell-lts
-  CHANNEL_NAME: lts
-  HOMEBREW_NO_ENV_HINTS: 1
-  HOMEBREW_NO_INSTALL_CLEANUP: 1
-
-jobs:
-  changes:
-    if: startsWith(github.repository_owner, 'azure') || github.repository_owner == 'PowerShell'
-    name: Change Detection
-    runs-on: ubuntu-latest
-    # Required permissions
-    permissions:
-      pull-requests: read
-    # Set job outputs to values from filter step
-    outputs:
-      workflows: ${{ steps.filter.outputs.workflows }}
-    steps:
-      - name: checkout
-        uses: actions/checkout@v4.2.2
-
-        # For pull requests it's not necessary to checkout the code
-      - uses: dorny/paths-filter@de90cc6fb38fc0963ad72b210f1f284cd68cea36 # v3.2.0
-        id: filter
-        with:
-          list-files: json
-          filters: |
-            workflows:
-              - '.github/workflows/PR-powershell-lts.yml'
-              - 'Formula/powershell-lts.rb'
-
-      - name: Capture outputs
-        run: |
-          "workflows: ${{ steps.filter.outputs.workflows }}"
-        shell: pwsh
-      
-  homebrew-formula-lts:
-    timeout-minutes: 15
-    needs: changes
-    if: ${{ needs.changes.outputs.workflows == 'true' }}
-    runs-on: macos-latest
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4.2.2
-
-      - name: Prepare Agent
-        uses: ./.github/workflows/composite/prep
-
-      - name: Install and Test Formula
-        uses: ./.github/workflows/composite/installAndTest
-
-  ready_to_merge:
-    name: LTS ready to merge
-    needs:
-      - homebrew-formula-lts
-      - changes
-    if: always()
-    uses: PowerShell/compliance/.github/workflows/ready-to-merge.yml@v1.0.0
-    with:
-      needs_context: ${{ toJson(needs) }}
diff --git a/.github/workflows/PR-powershell-preview.yml b/.github/workflows/PR-powershell-preview.yml
deleted file mode 100644
index c55d5e6a..00000000
--- a/.github/workflows/PR-powershell-preview.yml
+++ /dev/null
@@ -1,92 +0,0 @@
-# Copyright (c) Microsoft Corporation.
-# Licensed under the MIT license.
-
-name: PowerShell preview PR
-
-permissions: read-all
-
-on:
-  push:
-    paths:
-      - '.github/workflows/PR-powershell-preview.yml'
-      - 'Formula/powershell-preview.rb'
-    branches:
-      - master
-  pull_request:
-
-defaults:
-  run:
-    shell: pwsh
-env:
-  FORMULA_PATH: ./Formula/powershell-preview.rb
-  UPDATE_SCRIPT_PATH: ./scripts/Upgrade-Formula.ps1
-  FORMULA_NAME: powershell-preview
-  CHANNEL_NAME: preview
-  HOMEBREW_NO_ENV_HINTS: 1
-  HOMEBREW_NO_INSTALL_CLEANUP: 1
-
-jobs:
-  changes:
-    if: startsWith(github.repository_owner, 'azure') || github.repository_owner == 'PowerShell'
-    name: Change Detection
-    runs-on: ubuntu-latest
-    # Required permissions
-    permissions:
-      pull-requests: read
-    # Set job outputs to values from filter step
-    outputs:
-      workflows: ${{ steps.filter.outputs.workflows }}
-    steps:
-      - name: checkout
-        uses: actions/checkout@v4.2.2
-
-        # For pull requests it's not necessary to checkout the code
-      - uses: dorny/paths-filter@de90cc6fb38fc0963ad72b210f1f284cd68cea36 # v3.2.0
-        id: filter
-        with:
-          list-files: json
-          filters: |
-            workflows:
-              - '.github/workflows/PR-powershell-preview.yml'
-              - 'Formula/powershell-preview.rb'
-
-      - name: Capture outputs
-        run: |
-          "workflows: ${{ steps.filter.outputs.workflows }}"
-        shell: pwsh
-      
-  homebrew-formula-preview:
-    timeout-minutes: 15
-    needs: changes
-    if: ${{ needs.changes.outputs.workflows == 'true' }}
-    runs-on: macos-latest
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4.2.2
-        
-      - name: Check for applicable files
-        uses: dorny/paths-filter@de90cc6fb38fc0963ad72b210f1f284cd68cea36
-        id: filter
-        with:
-          filters: |
-            workflows:
-              - .github/workflows/PR-powershell-preview.yml
-              - Formula/powershell-preview.rb
-
-      - name: Prepare Agent
-        if: steps.filter.outputs.workflows == 'true'
-        uses: ./.github/workflows/composite/prep
-
-      - name: Install and Test Formula
-        if: steps.filter.outputs.workflows == 'true'
-        uses: ./.github/workflows/composite/installAndTest
-
-  ready_to_merge:
-    name: Preview ready to merge
-    needs:
-      - homebrew-formula-preview
-      - changes
-    if: always()
-    uses: PowerShell/compliance/.github/workflows/ready-to-merge.yml@v1.0.0
-    with:
-      needs_context: ${{ toJson(needs) }}
diff --git a/.github/workflows/PR-powershell.yml b/.github/workflows/PR-powershell.yml
deleted file mode 100644
index 294ca1b0..00000000
--- a/.github/workflows/PR-powershell.yml
+++ /dev/null
@@ -1,103 +0,0 @@
-# Copyright (c) Microsoft Corporation.
-# Licensed under the MIT license.
-
-name: PowerShell Formula PR
-
-permissions: read-all
-
-on:
-  workflow_dispatch:
-  push:
-    paths:
-      - '.github/workflows/PR-powershell.yml'
-      - 'Formula/powershell.rb'
-    branches:
-      - master
-  pull_request:
-
-defaults:
-  run:
-    shell: pwsh
-
-env:
-  FORMULA_PATH: ./Formula/powershell.rb
-  UPDATE_SCRIPT_PATH: ./scripts/Upgrade-Formula.ps1
-  FORMULA_NAME: powershell
-  CHANNEL_NAME: stable
-  HOMEBREW_NO_ENV_HINTS: 1
-  HOMEBREW_NO_INSTALL_CLEANUP: 1
-
-jobs:
-  changes:
-    if: startsWith(github.repository_owner, 'azure') || github.repository_owner == 'PowerShell'
-    name: Change Detection
-    runs-on: ubuntu-latest
-    # Required permissions
-    permissions:
-      pull-requests: read
-    # Set job outputs to values from filter step
-    outputs:
-      workflows: ${{ steps.filter.outputs.workflows }}
-    steps:
-      - name: checkout
-        uses: actions/checkout@v4.2.2
-
-        # For pull requests it's not necessary to checkout the code
-      - uses: dorny/paths-filter@de90cc6fb38fc0963ad72b210f1f284cd68cea36 # v3.2.0
-        id: filter
-        with:
-          list-files: json
-          filters: |
-            workflows:
-              - '.github/workflows/PR-powershell.yml'
-              - 'Formula/powershell.rb'
-
-      - name: Capture outputs
-        run: |
-          "workflows: ${{ steps.filter.outputs.workflows }}"
-        shell: pwsh
-      
-  homebrew-formula-stable:
-    timeout-minutes: 15
-    needs: changes
-    if: ${{ needs.changes.outputs.workflows == 'true' }}
-    runs-on: macos-latest
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4.2.2
-
-      - name: Check for applicable files
-        uses: dorny/paths-filter@de90cc6fb38fc0963ad72b210f1f284cd68cea36
-        id: filter
-        with:
-          filters: |
-            workflows:
-              - '.github/workflows/PR-powershell.yml'
-              - 'Formula/powershell.rb'
-
-      - name: Prepare Agent
-        if: steps.filter.outputs.workflows == 'true'
-        uses: ./.github/workflows/composite/prep
-
-      - name: Uninstall PowerShell
-        if: steps.filter.outputs.workflows == 'true'
-        shell: bash
-        run: |
-          cd /
-          PKG_ID='com.microsoft.powershell'
-          pkgutil --only-files --files ${PKG_ID} | awk '!/\.app/' | tr '\n' '\0' | xargs -n 1 -0 -p sudo rm
-          sudo pkgutil --forget ${PKG_ID}
-
-      - name: Install and Test Formula
-        if: steps.filter.outputs.workflows == 'true'
-        uses: ./.github/workflows/composite/installAndTest
-
-  ready_to_merge:
-    name: Stable ready to merge
-    needs:
-      - homebrew-formula-stable
-      - changes
-    if: always()
-    uses: PowerShell/compliance/.github/workflows/ready-to-merge.yml@v1.0.0
-    with:
-      needs_context: ${{ toJson(needs) }}
diff --git a/.github/workflows/composite/createPR/action.yml b/.github/workflows/composite/createPR/action.yml
deleted file mode 100644
index c9612bbd..00000000
--- a/.github/workflows/composite/createPR/action.yml
+++ /dev/null
@@ -1,28 +0,0 @@
-# Copyright (c) Microsoft Corporation.
-# Licensed under the MIT license.
-
-name: "Create PR"
-
-description: "Create PR"
-
-inputs:
-  token:
-    description: Token used to create PR
-
-runs:
-  using: "composite"
-  steps:
-      - name: (scheduled-auto-release) Create Pull Request
-        if: github.event_name == 'schedule' || github.event_name == 'workflow_dispatch'
-        id: cpr
-        uses: peter-evans/create-pull-request@2b011faafdcbc9ceb11414d64d0573f37c774b04 # v4.2.3
-        with:
-          commit-message: "Update ${{ env.FORMULA_NAME}} formula to version ${{ env.NEW_FORMULA_VERSION }}"
-          token: ${{ inputs.token }}
-          committer: PwshBot <pwshbot@microsoft.com>
-          author: PwshBot <pwshbot@microsoft.com>
-          title: "Update ${{ env.FORMULA_NAME }} formula to version ${{ env.NEW_FORMULA_VERSION }}"
-          base: master
-          draft: false
-          branch: powershell-${{ env.CHANNEL_NAME }}-patch
-          push-to-fork: pwshBot/Homebrew-Tap
diff --git a/.github/workflows/composite/installAndTest/action.yml b/.github/workflows/composite/installAndTest/action.yml
deleted file mode 100644
index d69afe65..00000000
--- a/.github/workflows/composite/installAndTest/action.yml
+++ /dev/null
@@ -1,47 +0,0 @@
-# Copyright (c) Microsoft Corporation.
-# Licensed under the MIT license.
-
-name: "install and test"
-
-description: "Install and test formula"
-
-runs:
-  using: "composite"
-  steps:
-    - name: brew install (Verify install of formula)
-      shell: bash
-      run: |
-        brew install --verbose --formula $FORMULA_NAME
-
-    # See https://docs.brew.sh/Formula-Cookbook#audit-the-formula
-    - name: brew style
-      if: github.event_name != 'schedule'
-      run: |
-        brew style $env:FORMULA_PATH
-      shell: pwsh
-
-    # We are skipping `installed` because of the following error:
-    #  Broken dependencies:
-    #  Error: 1 problem in 1 formula detected
-    #    /usr/local/opt/openssl/lib/libcrypto.1.0.0.dylib (openssl)
-    #    /usr/local/opt/openssl/lib/libssl.1.0.0.dylib (openssl)
-    #  /Users/runner/work/Homebrew-Tap/Homebrew-Tap/Formula/powershell.rb: * powershell has broken dynamic library links:
-
-    # We are skipping `version` because of the following error:
-    #  Broken dependencies:
-    #  /Users/runner/work/Homebrew-Tap/Homebrew-Tap/Formula/powershell-preview.rb: * Stable: version 7.2.0-rc.1 is redundant with version scanned from URL
-    #    Error: 1 problem in 1 formula detected
-    #    Error: Stable: version 7.2.0-rc.1 is redundant with version scanned from URL
-    #    Error: Process completed with exit code 1.
-    #
-    # We use the version property to quickly determine if an update is needed and we don't want to remove it as the version rule which is being skipped suggests
-    - run: |
-        brew audit --strict --online --display-filename --display-cop-names --formula --except 'installed,version' $env:FORMULA_NAME
-      shell: pwsh
-      name: Brew Audit
-      if: github.event_name != 'schedule'
-
-    - name: brew test (Verify tests in formula)
-      run: |
-        brew test $env:FORMULA_PATH
-      shell: pwsh
diff --git a/.github/workflows/composite/prep/action.yml b/.github/workflows/composite/prep/action.yml
deleted file mode 100644
index 566733b9..00000000
--- a/.github/workflows/composite/prep/action.yml
+++ /dev/null
@@ -1,46 +0,0 @@
-# Copyright (c) Microsoft Corporation.
-# Licensed under the MIT license.
-
-name: "Prepare Agent"
-
-description: "Prepare Agent"
-
-defaults:
-  run:
-    shell: pwsh
-
-runs:
-  using: "composite"
-  steps:
-    # See https://brew.sh
-    - name: Set up Homebrew
-      id: set-up-homebrew
-      uses: Homebrew/actions/setup-homebrew@master
-
-    - name: Cache Bundler RubyGems
-      uses: actions/cache@v4
-      with:
-        path: ${{ steps.set-up-homebrew.outputs.gems-path }}
-        key: ${{ runner.os }}-rubygems-${{ steps.set-up-homebrew.outputs.gems-hash }}
-        restore-keys: ${{ runner.os }}-rubygems-
-
-    - name: Install Bundler RubyGems
-      run: brew install-bundler-gems
-      shell: pwsh
-
-    - name: Update Brew
-      run: brew update --force --verbose
-      shell: pwsh
-
-    - name: (scheduled-auto-release) Auto-update formula
-      if: github.event_name == 'schedule' || github.event_name == 'workflow_dispatch'
-      run: |
-        &$env:UPDATE_SCRIPT_PATH -FormulaPath $env:FORMULA_PATH -Channel $env:CHANNEL_NAME
-      shell: pwsh
-
-    - name: Make local repo a tap
-      run: |
-        git add -A
-        git commit -m "Update ${{ env.FORMULA_NAME }} formula to version ${{ env.NEW_FORMULA_VERSION }}"
-        git clone ./ "$(brew --repo)/Library/Taps/powershell/homebrew-tap"
-      shell: pwsh
diff --git a/.github/workflows/cron-powershell-preview.yml b/.github/workflows/cron-powershell-preview.yml
deleted file mode 100644
index 73c14b5b..00000000
--- a/.github/workflows/cron-powershell-preview.yml
+++ /dev/null
@@ -1,42 +0,0 @@
-# Copyright (c) Microsoft Corporation.
-# Licensed under the MIT license.
-
-name: PowerShell preview scheduled update
-
-permissions: read-all
-
-on:
-  workflow_dispatch:
-  schedule:
-    # At 20:20 UTC on every day-of-week from Monday through Friday.
-    - cron:  '0 0/4 * * *'
-
-defaults:
-  run:
-    shell: pwsh
-env:
-  FORMULA_PATH: ./Formula/powershell-preview.rb
-  UPDATE_SCRIPT_PATH: ./scripts/Upgrade-Formula.ps1
-  FORMULA_NAME: powershell-preview
-  CHANNEL_NAME: preview
-  HOMEBREW_NO_ENV_HINTS: 1
-  HOMEBREW_NO_INSTALL_CLEANUP: 1
-
-jobs:
-  homebrew-formula-preview:
-    timeout-minutes: 15
-    runs-on: macos-latest
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4.2.2
-
-      - name: Prepare Agent
-        uses: ./.github/workflows/composite/prep
-
-      - name: Install and Test Formula
-        uses: ./.github/workflows/composite/installAndTest
-
-      - name: Create PR if needed
-        uses: ./.github/workflows/composite/createPR
-        with:
-          token: ${{ secrets.PR_PAT }}
diff --git a/.github/workflows/cron-powershell.yml b/.github/workflows/cron-powershell.yml
deleted file mode 100644
index 432c6a5d..00000000
--- a/.github/workflows/cron-powershell.yml
+++ /dev/null
@@ -1,51 +0,0 @@
-# Copyright (c) Microsoft Corporation.
-# Licensed under the MIT license.
-
-name: PowerShell scheduled update
-
-permissions: read-all
-
-on:
-  workflow_dispatch:
-  schedule:
-    # At 20:20 UTC on every day-of-week from Monday through Friday.
-    - cron:  '0 0/4 * * *'
-
-defaults:
-  run:
-    shell: pwsh
-
-env:
-  FORMULA_PATH: ./Formula/powershell.rb
-  UPDATE_SCRIPT_PATH: ./scripts/Upgrade-Formula.ps1
-  FORMULA_NAME: powershell
-  CHANNEL_NAME: stable
-  HOMEBREW_NO_ENV_HINTS: 1
-  HOMEBREW_NO_INSTALL_CLEANUP: 1
-
-jobs:
-  homebrew-formula-stable:
-    timeout-minutes: 15
-    runs-on: macos-latest
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4.2.2
-
-      - name: Prepare Agent
-        uses: ./.github/workflows/composite/prep
-
-      - name: Uninstall PowerShell
-        shell: bash
-        run: |
-          cd /
-          PKG_ID='com.microsoft.powershell'
-          pkgutil --only-files --files ${PKG_ID} | awk '!/\.app/' | tr '\n' '\0' | xargs -n 1 -0 -p sudo rm
-          sudo pkgutil --forget ${PKG_ID}
-
-      - name: Install and Test Formula
-        uses: ./.github/workflows/composite/installAndTest
-
-      - name: Create PR if needed
-        uses: ./.github/workflows/composite/createPR
-        with:
-          token: ${{ secrets.PR_PAT }}
diff --git a/Formula/powershell-lts.rb b/Formula/powershell-lts.rb
index fe82019b..2bcffa34 100644
--- a/Formula/powershell-lts.rb
+++ b/Formula/powershell-lts.rb
@@ -29,6 +29,11 @@ class PowershellLts < Formula
   version "7.4.11"
   version_scheme 1
 
+  # Deprecated: this tap is unmaintained now that PowerShell ships in Homebrew
+  # Core. Core has no LTS formula; install the stable `powershell` formula
+  # (`brew install powershell`) or an official PowerShell package instead.
+  deprecate! date: "2026-06-18", because: "is unmaintained now that PowerShell is published to Homebrew Core"
+
   # .NET Core 3.1 requires High Sierra - https://docs.microsoft.com/en-us/dotnet/core/install/dependencies?pivots=os-macos&tabs=netcore31
   depends_on macos: :high_sierra
 
diff --git a/Formula/powershell-preview.rb b/Formula/powershell-preview.rb
index 6e1affa0..c92723d3 100644
--- a/Formula/powershell-preview.rb
+++ b/Formula/powershell-preview.rb
@@ -33,6 +33,11 @@ class PowershellPreview < Formula
     url :head
   end
 
+  # Deprecated: this tap is unmaintained now that PowerShell ships in Homebrew
+  # Core. Core has no preview formula; install the stable `powershell` formula
+  # (`brew install powershell`) or an official PowerShell preview package instead.
+  deprecate! date: "2026-06-18", because: "is unmaintained now that PowerShell is published to Homebrew Core"
+
   # .NET Core 3.1 requires High Sierra - https://docs.microsoft.com/en-us/dotnet/core/install/dependencies?pivots=os-macos&tabs=netcore31
   depends_on macos: :high_sierra
 
diff --git a/Formula/powershell.rb b/Formula/powershell.rb
index 618bdc29..86039885 100644
--- a/Formula/powershell.rb
+++ b/Formula/powershell.rb
@@ -29,6 +29,10 @@ class Powershell < Formula
   version "7.5.2"
   version_scheme 1
 
+  # Deprecated: PowerShell is now maintained directly by Homebrew Core, which
+  # publishes its own `powershell` formula. Run `brew install powershell`.
+  deprecate! date: "2026-06-18", because: "is now maintained by Homebrew Core as the `powershell` formula"
+
   # .NET Core 3.1 requires High Sierra - https://docs.microsoft.com/en-us/dotnet/core/install/dependencies?pivots=os-macos&tabs=netcore31
   depends_on macos: :high_sierra