Ignore TypeScript 7 until Astro check accepts it

.github/dependabot.yml

@@ -7,6 +7,10 @@ updates:
     schedule:
       interval: weekly
     open-pull-requests-limit: 5
+    ignore:
+      # Issue 5: @astrojs/check does not accept TypeScript 7 yet.
+      - dependency-name: "typescript"
+        versions: ["7.x"]
   - package-ecosystem: github-actions
     directory: /
     schedule:

.github/workflows/typescript-7.yml

@@ -0,0 +1,39 @@
+# Copyright 2026 OpenSourceOM
+# SPDX-License-Identifier: Apache-2.0
+name: TypeScript 7
+
+on:
+  schedule:
+    # 15:00 UTC on the 1st. Stays quiet until @astrojs/check accepts TypeScript 7.
+    - cron: "0 15 1 * *"
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  issues: write
+
+jobs:
+  check:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Comment on issue 5 when TypeScript 7 is accepted
+        env:
+          GH_TOKEN: ${{ github.token }}
+        run: |
+          set -euo pipefail
+          range=$(npm view @astrojs/check@latest peerDependencies.typescript)
+          echo "typescript peer: ${range}"
+          # Published ranges look like "^5.0.0 || ^6.0.0".
+          printf '%s\n' "$range" | grep -Eq '(^|[^0-9])7\.' || exit 0
+          marker="<!-- typescript-7-ready -->"
+          if gh api --paginate "repos/${GITHUB_REPOSITORY}/issues/5/comments" --jq '.[].body' | grep -F -q "$marker"; then
+            exit 0
+          fi
+          gh issue reopen 5 --repo "$GITHUB_REPOSITORY" || true
+          gh issue comment 5 --repo "$GITHUB_REPOSITORY" --body "$(cat <<EOF
+          ${marker}
+          \`@astrojs/check\` now accepts TypeScript 7 (\`${range}\`).
+
+          Remove the \`typescript\` \`7.x\` ignore in \`.github/dependabot.yml\`, then bump \`typescript\`. The ignore on pull request #1 can still suppress Dependabot, so bump the dependency directly or reopen that pull request.
+          EOF
+          )"