diff --git a/.github/workflows/agent-support-app-config-linter.yml b/.github/workflows/agent-support-app-config-linter.yml
deleted file mode 100644
index adc4cf33d4..0000000000
--- a/.github/workflows/agent-support-app-config-linter.yml
+++ /dev/null
@@ -1,109 +0,0 @@
----
-name: Prepare app_config linter compatibility
-
-on:
-  pull_request:
-    branches:
-      - master
-
-permissions:
-  contents: read
-
-jobs:
-  prepare:
-    if: ${{ github.event.pull_request.head.repo.full_name == github.repository }}
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout pull-request branch
-        uses: actions/checkout@v7.0.1
-        with:
-          repository: ${{ github.event.pull_request.head.repo.full_name }}
-          ref: ${{ github.event.pull_request.head.ref }}
-          fetch-depth: 0
-
-      - name: Switch repository workflows to compatibility action
-        shell: bash
-        run: |
-          set -euo pipefail
-          python3 - <<'PY'
-          from pathlib import Path
-
-          replacement = "uses: ./.github/actions/addon-linter"
-          for filename in (
-              ".github/workflows/onpr_check-pr.yaml",
-              ".github/workflows/onpush_builder.yaml",
-          ):
-              path = Path(filename)
-              content = path.read_text(encoding="utf-8")
-              needle = "uses: frenck/action-addon-linter@v2"
-              count = content.count(needle)
-              if count != 1:
-                  raise SystemExit(f"Expected one {needle!r} in {filename}, found {count}")
-              path.write_text(content.replace(needle, replacement), encoding="utf-8")
-          PY
-
-      - name: Run normalizer unit tests
-        run: python3 .github/scripts/test_prepare_addon_lint_config.py
-
-      - name: Create current-schema linter fixtures
-        shell: bash
-        run: |
-          set -euo pipefail
-          mkdir -p .tmp-addon-linter-short .tmp-addon-linter-long
-
-          cat > .tmp-addon-linter-short/config.yaml <<'SHORT_FIXTURE'
-          ---
-          name: App Config Short Form Fixture
-          version: "1.0.0"
-          slug: app_config_short_fixture
-          description: Validates current Home Assistant short-form app map names
-          arch:
-            - amd64
-          map:
-            - app_config:rw
-            - all_app_configs:ro
-          SHORT_FIXTURE
-
-          cat > .tmp-addon-linter-long/config.yaml <<'LONG_FIXTURE'
-          ---
-          name: App Config Long Form Fixture
-          version: "1.0.0"
-          slug: app_config_long_fixture
-          description: Validates current Home Assistant long-form app map names
-          arch:
-            - amd64
-          map:
-            - type: app_config
-              read_only: false
-            - type: all_app_configs
-              read_only: true
-          LONG_FIXTURE
-
-      - name: Verify current short-form map names through upstream linter
-        uses: ./.github/actions/addon-linter
-        with:
-          path: ./.tmp-addon-linter-short
-
-      - name: Verify current long-form map names through upstream linter
-        uses: ./.github/actions/addon-linter
-        with:
-          path: ./.tmp-addon-linter-long
-
-      - name: Check prepared workflow changes
-        shell: bash
-        run: |
-          set -euo pipefail
-          git diff --check
-          git diff --exit-code -- .github/actions/addon-linter/action.yml \
-            .github/scripts/prepare_addon_lint_config.py \
-            .github/scripts/test_prepare_addon_lint_config.py
-          test "$(git diff --name-only -- .github/workflows/onpr_check-pr.yaml .github/workflows/onpush_builder.yaml | wc -l)" -eq 2
-
-      - name: Export validated workflow files
-        uses: actions/upload-artifact@v6
-        with:
-          name: app-config-workflows
-          path: |
-            .github/workflows/onpr_check-pr.yaml
-            .github/workflows/onpush_builder.yaml
-          if-no-files-found: error