diff --git a/.github/workflows/security-resolutions.yml b/.github/workflows/security-resolutions.yml
new file mode 100644
index 0000000..c146008
--- /dev/null
+++ b/.github/workflows/security-resolutions.yml
@@ -0,0 +1,195 @@
+name: Auto-fix vulnerable transitive dependencies
+
+on:
+  schedule:
+    # Runs every Monday at 8:00 UTC
+    - cron: "0 8 * * 1"
+  workflow_dispatch: # Allow manual trigger
+
+permissions:
+  contents: write
+  pull-requests: write
+  security-events: read
+
+jobs:
+  fix-vulnerabilities:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v6
+        with:
+          node-version: "24"
+
+      - name: Install dependencies
+        run: yarn install --frozen-lockfile
+
+      - name: Fetch Dependabot alerts and run yarn audit
+        id: fetch
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          echo "::group::Fetching Dependabot alerts (medium/high/critical)"
+          gh api \
+            "/repos/${{ github.repository }}/dependabot/alerts?state=open&severity=medium,high,critical&per_page=100" \
+            > /tmp/dependabot-alerts.json 2>/dev/null || echo "[]" > /tmp/dependabot-alerts.json
+          echo "::endgroup::"
+
+          echo "::group::Running yarn audit"
+          yarn audit --json > /tmp/yarn-audit.json 2>/dev/null || true
+          echo "::endgroup::"
+
+      - name: Analyze and update resolutions
+        id: audit
+        run: |
+          python3 << 'PYEOF'
+          import json, os
+
+          # "medium" = Dependabot terminology, "moderate" = yarn audit terminology
+          MIN_SEVERITIES = {"moderate", "medium", "high", "critical"}
+          advisories = {}
+
+          # --- Source 1: Dependabot alerts ---
+          try:
+              with open("/tmp/dependabot-alerts.json", "r") as f:
+                  alerts = json.load(f)
+              if isinstance(alerts, list):
+                  for alert in alerts:
+                      vuln = alert.get("security_vulnerability", {})
+                      name = vuln.get("package", {}).get("name", "")
+                      severity = alert.get("security_advisory", {}).get("severity", "").lower()
+                      if severity not in MIN_SEVERITIES or not name:
+                          continue
+                      patched_obj = vuln.get("first_patched_version")
+                      if patched_obj and patched_obj.get("identifier"):
+                          version = patched_obj["identifier"]
+                          if name not in advisories or version > advisories[name]["version"]:
+                              advisories[name] = {"version": version, "severity": severity, "source": "dependabot"}
+                          print(f"  Dependabot: {name} ({severity}) -> {version}")
+          except Exception as e:
+              print(f"  Warning: Could not parse Dependabot alerts: {e}")
+
+          # --- Source 2: yarn audit ---
+          try:
+              with open("/tmp/yarn-audit.json", "r") as f:
+                  for line in f:
+                      try:
+                          obj = json.loads(line)
+                          if obj.get("type") == "auditAdvisory":
+                              d = obj["data"]["advisory"]
+                              name = d["module_name"]
+                              patched = d.get("patched_versions", "")
+                              severity = d.get("severity", "").lower()
+                              if severity not in MIN_SEVERITIES:
+                                  continue
+                              if patched.startswith(">="):
+                                  version = patched[2:].strip()
+                                  if name not in advisories or version > advisories[name]["version"]:
+                                      advisories[name] = {"version": version, "severity": severity, "source": "yarn-audit"}
+                                  print(f"  yarn audit: {name} ({severity}) -> {version}")
+                      except json.JSONDecodeError:
+                          pass
+          except Exception as e:
+              print(f"  Warning: Could not parse yarn audit: {e}")
+
+          print(f"\nFound {len(advisories)} vulnerable packages (moderate/high/critical)")
+
+          output_file = os.environ.get("GITHUB_OUTPUT", "/dev/null")
+
+          if not advisories:
+              print("No actionable vulnerabilities found")
+              with open(output_file, "a") as f:
+                  f.write("has_updates=false\n")
+              raise SystemExit(0)
+
+          # Read current package.json
+          with open("package.json", "r") as f:
+              pkg = json.load(f)
+
+          resolutions = pkg.get("resolutions", {})
+          needed = {}
+
+          for name, info in advisories.items():
+              current = resolutions.get(name, "")
+              target = f"^{info['version']}"
+              if current != target:
+                  needed[name] = {
+                      "version": target,
+                      "severity": info["severity"],
+                      "current": current,
+                      "source": info["source"],
+                  }
+
+          if not needed:
+              print("All resolutions already up to date")
+              with open(output_file, "a") as f:
+                  f.write("has_updates=false\n")
+              raise SystemExit(0)
+
+          # Build summary table
+          lines = []
+          lines.append("| Dependency | Before | After | Severity | Source |")
+          lines.append("|---|---|---|---|---|")
+          for name, info in sorted(needed.items()):
+              before = info["current"] if info["current"] else "_(none)_"
+              lines.append(
+                  f"| **{name}** | {before} | {info['version']} | {info['severity']} | {info['source']} |"
+              )
+
+          summary = "\n".join(lines)
+          print(f"\nUpdates needed:\n{summary}")
+
+          # Apply resolutions to package.json
+          for name, info in needed.items():
+              resolutions[name] = info["version"]
+
+          pkg["resolutions"] = resolutions
+
+          with open("package.json", "w") as f:
+              json.dump(pkg, f, indent=2)
+              f.write("\n")
+
+          with open(output_file, "a") as f:
+              f.write("has_updates=true\n")
+              f.write(f"summary<<EOFSUM\n{summary}\nEOFSUM\n")
+
+          print(f"\nApplied {len(needed)} resolution updates to package.json")
+          PYEOF
+
+      - name: Reinstall with updated resolutions
+        if: steps.audit.outputs.has_updates == 'true'
+        run: yarn install
+
+      - name: Verify fixes
+        if: steps.audit.outputs.has_updates == 'true'
+        run: |
+          echo "Remaining vulnerabilities (if any):"
+          yarn audit --summary 2>/dev/null || true
+
+      - name: Create Pull Request
+        if: steps.audit.outputs.has_updates == 'true'
+        uses: peter-evans/create-pull-request@v7
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          commit-message: "fix: update resolutions for vulnerable transitive dependencies"
+          branch: automated/security-resolutions
+          delete-branch: true
+          title: "Security: Update transitive dependency resolutions"
+          body: |
+            ## Summary
+            Automated update of `resolutions` in `package.json` to fix vulnerable transitive dependencies.
+            Sources: Dependabot alerts (medium/high/critical) + yarn audit.
+
+            ### Changes
+            ${{ steps.audit.outputs.summary }}
+
+            > **Note:** This only updates transitive dependencies via resolutions. Direct dependency upgrades should be done manually to avoid breaking changes.
+
+            ### Verify
+            - [ ] `yarn install` succeeds
+            - [ ] `yarn build` succeeds
+            - [ ] App runs correctly
+          labels: |
+            dependencies
+            security