diff --git a/.github/workflows/techapi-verify-comment.yml b/.github/workflows/techapi-verify-comment.yml
index d96fd8a..feb0e69 100644
--- a/.github/workflows/techapi-verify-comment.yml
+++ b/.github/workflows/techapi-verify-comment.yml
@@ -56,6 +56,9 @@ jobs:
         env:
           TECHAPI_COMMENT_ID: ${{ github.event.client_payload.comment_id }}
 
+      - name: Checkout TechEngine
+        uses: actions/checkout@v4
+
       - name: Checkout TechAPI PR head
         uses: actions/checkout@v4
         with:
@@ -67,15 +70,21 @@ jobs:
       - uses: actions/setup-python@v5
         with:
           python-version: "3.12"
+          cache: pip
 
-      # app.verify is a stdlib-only TechAPI module; run it from the checkout.
-      # mode=tier0 (auto PR report): fast offline Tier 0 only (changed + baseline).
-      # mode=all (/verify on demand): `pr` runs Tiers 0-3 (3 = promotion DRY-RUN).
+      - name: Install TechEngine
+        run: pip install -e .
+
+      # app.verify now lives in TechEngine; run it from the engine root with
+      # TECHAPI_DATA_DIR pointing at the TechAPI checkout (its `_changed_data_slugs`
+      # runs git inside that data repo). mode=tier0 = fast offline Tier 0 (auto PR
+      # report); mode=all = `pr` Tiers 0-3 (3 = promotion DRY-RUN).
       - name: Run verification
         id: verify
+        env:
+          TECHAPI_DATA_DIR: ${{ github.workspace }}/TechAPI/data
         run: |
-          cd TechAPI
-          git fetch origin main --depth=1 || true
+          git -C TechAPI fetch origin main --depth=1 || true
           {
             echo 'report<<VERIFY_EOF'
             if [ "${MODE}" = "tier0" ]; then
diff --git a/.github/workflows/verify-network.yml b/.github/workflows/verify-network.yml
new file mode 100644
index 0000000..d78c1fd
--- /dev/null
+++ b/.github/workflows/verify-network.yml
@@ -0,0 +1,127 @@
+name: verify-network
+
+# Network verification tiers (source-URL liveness + external cross-reference) and
+# verified promotion, run in TechEngine against a TechAPI checkout. NEVER on
+# pull_request — external sites, rate-limited. Scheduled + manual. Promotions are
+# committed as TechEngineBot and opened as a human-gated PR on TechAPI; the job
+# hard-guards that nothing but `verified` flags + the ledger changed.
+on:
+  workflow_dispatch:
+    inputs:
+      apply:
+        description: "Flip verified->true and open a PR on TechAPI (else dry-run)"
+        type: boolean
+        default: false
+      max_urls:
+        description: "Frontier records to URL-check"
+        default: "2000"
+      max_crossref:
+        description: "Records to cross-reference"
+        default: "500"
+  schedule:
+    - cron: "0 4 * * 1"  # Mondays 04:00 UTC
+
+permissions:
+  contents: read
+
+concurrency:
+  group: verify-network
+  cancel-in-progress: false
+
+jobs:
+  verify-network:
+    runs-on: ubuntu-latest
+    env:
+      PYTHONIOENCODING: utf-8
+      APPLY: ${{ github.event_name == 'schedule' || github.event.inputs.apply == 'true' }}
+      TECHAPI_DATA_DIR: ${{ github.workspace }}/TechAPI/data
+      WRITE_TOKEN: ${{ secrets.TECHENGINEBOT_TOKEN || secrets.TECHAPI_TOKEN }}
+    steps:
+      - name: Checkout TechEngine
+        uses: actions/checkout@v4
+
+      - name: Checkout TechAPI
+        uses: actions/checkout@v4
+        with:
+          repository: GetTechAPI/TechAPI
+          path: TechAPI
+          fetch-depth: 0
+          token: ${{ secrets.TECHENGINEBOT_TOKEN || secrets.TECHAPI_TOKEN || secrets.GITHUB_TOKEN }}
+
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.12"
+          cache: pip
+
+      - name: Install TechEngine
+        run: pip install -e .
+
+      - name: Tier 0 score (writes scores cache)
+        run: python -m app.verify score
+
+      - name: Tier 1 source-URL liveness
+        run: python -m app.verify check-urls --max ${{ github.event.inputs.max_urls || '2000' }}
+
+      - name: Tier 2 external cross-reference
+        run: python -m app.verify crossref --max ${{ github.event.inputs.max_crossref || '500' }}
+
+      - name: Tier 3 promote (dry-run)
+        run: python -m app.verify promote
+
+      - name: Tier 3 promote (apply)
+        if: ${{ env.APPLY == 'true' }}
+        run: python -m app.verify promote --apply
+
+      - name: Structural validator self-check
+        if: ${{ env.APPLY == 'true' }}
+        run: python -m app.validate
+
+      # Guard: the only tracked changes in TechAPI may be `verified` toggles in
+      # data/**.json (the ledger under data/_verify/ is expected to change too).
+      - name: Guard diff scope
+        if: ${{ env.APPLY == 'true' }}
+        run: |
+          python - <<'PY'
+          import subprocess, sys
+          out = subprocess.run(
+              ["git", "-C", "TechAPI", "diff", "--unified=0", "--",
+               "data/", ":(exclude)data/_verify/**"],
+              capture_output=True, text=True).stdout
+          bad = []
+          for line in out.splitlines():
+              if line.startswith(("+++", "---", "@@", "diff ", "index ")):
+                  continue
+              if line.startswith(("+", "-")) and line[1:].strip():
+                  body = line[1:].strip().rstrip(",")
+                  if body not in ('"verified": true', '"verified": false'):
+                      bad.append(line)
+          if bad:
+              print("Unexpected non-verified changes:")
+              print("\n".join(bad[:50]))
+              sys.exit(1)
+          print("diff scope OK: only verified toggles")
+          PY
+
+      - name: Open promotion PR on TechAPI (TechEngineBot)
+        if: ${{ env.APPLY == 'true' }}
+        env:
+          GH_TOKEN: ${{ env.WRITE_TOKEN }}
+        run: |
+          set -e
+          cd TechAPI
+          if git diff --quiet -- data/; then
+            echo "no promotions to commit"; exit 0
+          fi
+          branch="verify/promote-${{ github.run_id }}"
+          git config user.name "TechEngineBot"
+          git config user.email "289859915+TechEngineBot@users.noreply.github.com"
+          git checkout -b "$branch"
+          git add data/
+          git commit -m "data(verify): promote records to verified (reality cross-reference)
+
+          Auto-promotions from the verification layer (green+live-source or crossref-confirm).
+          Each flip is verified:false->true only; see data/_verify/ledger.jsonl. Refs #1"
+          git push origin "$branch"
+          gh pr create --repo GetTechAPI/TechAPI --base main --head "$branch" \
+            --title "data(verify): verified promotions ($(date -u +%Y-%m-%d))" \
+            --body "Automated verified promotions from \`app.verify promote\` (run in TechEngine). Each change flips only the \`verified\` flag; structural validator passed and diff scope guarded. Review before merge. Refs #1"
diff --git a/.github/workflows/verify-status.yml b/.github/workflows/verify-status.yml
new file mode 100644
index 0000000..472ed2a
--- /dev/null
+++ b/.github/workflows/verify-status.yml
@@ -0,0 +1,61 @@
+name: verify-status
+
+# Keep TechAPI's data/_verify/status.json (the verification-state aggregate: how
+# many records are verified + Tier 0 bands per category) current. Runs in
+# TechEngine against a TechAPI checkout and commits the refreshed file back to
+# TechAPI main as TechEngineBot. Fires when TechAPI main changes (relayed by
+# TechAPI's notify-engine -> techapi-updated) and daily as a backstop. The
+# "commit only if changed" guard means the status commit can't loop.
+on:
+  repository_dispatch:
+    types: [techapi-updated]
+  schedule:
+    - cron: "30 5 * * *"   # daily 05:30 UTC backstop
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+concurrency:
+  group: verify-status
+  cancel-in-progress: false
+
+jobs:
+  status:
+    runs-on: ubuntu-latest
+    env:
+      PYTHONIOENCODING: utf-8
+      TECHAPI_DATA_DIR: ${{ github.workspace }}/TechAPI/data
+    steps:
+      - name: Checkout TechEngine
+        uses: actions/checkout@v4
+
+      - name: Checkout TechAPI
+        uses: actions/checkout@v4
+        with:
+          repository: GetTechAPI/TechAPI
+          path: TechAPI
+          token: ${{ secrets.TECHENGINEBOT_TOKEN || secrets.TECHAPI_TOKEN || secrets.GITHUB_TOKEN }}
+
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.12"
+          cache: pip
+
+      - name: Install TechEngine
+        run: pip install -e .
+
+      - name: Regenerate verification status aggregate
+        run: python -m app.verify status --output TechAPI/data/_verify/status.json
+
+      - name: Commit to TechAPI if changed (TechEngineBot)
+        run: |
+          cd TechAPI
+          git add data/_verify/status.json
+          if git diff --cached --quiet; then
+            echo "verification status unchanged"; exit 0
+          fi
+          git config user.name "TechEngineBot"
+          git config user.email "289859915+TechEngineBot@users.noreply.github.com"
+          git commit -m "chore(verify): refresh verification status aggregate"
+          git push origin HEAD:main