From 192077cea8d76f5f31f215209d741e64df79351a Mon Sep 17 00:00:00 2001
From: nrslib <38722970+nrslib@users.noreply.github.com>
Date: Fri, 20 Feb 2026 13:49:18 +0900
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---
 .github/workflows/dependency-check.yml | 47 ++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)
 create mode 100644 .github/workflows/dependency-check.yml

diff --git a/.github/workflows/dependency-check.yml b/.github/workflows/dependency-check.yml
new file mode 100644
index 0000000..4ea0f20
--- /dev/null
+++ b/.github/workflows/dependency-check.yml
@@ -0,0 +1,47 @@
+name: Dependency Health Check
+
+on:
+  schedule:
+    - cron: '0 0 * * *'
+  workflow_dispatch:
+
+jobs:
+  fresh-install:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+
+      - name: Install without lockfile
+        run: |
+          rm package-lock.json
+          npm install
+
+      - name: Build
+        run: npm run build
+
+      - name: Verify CLI startup
+        run: node bin/takt --version
+
+      - name: Notify Slack on failure
+        if: failure()
+        uses: slackapi/slack-github-action@v2.0.0
+        with:
+          webhook-type: incoming-webhook
+          webhook: ${{ secrets.SLACK_WEBHOOK_URL }}
+          payload: |
+            {
+              "text": "⚠️ Dependency health check failed",
+              "blocks": [
+                {
+                  "type": "section",
+                  "text": {
+                    "type": "mrkdwn",
+                    "text": "*⚠️ Dependency Health Check Failed*\nA dependency may have published a broken version.\n<${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}|View logs>"
+                  }
+                }
+              ]
+            }