feat(deploy): rebuild protected staging lane

.github/workflows/deploy.yml

@@ -4,7 +4,7 @@ on:
   pull_request:
     branches: [dev, staging, main]
   push:
-    branches: [dev]
+    branches: [dev, staging]
   workflow_dispatch:
 
 permissions:
@@ -143,7 +143,6 @@ jobs:
           done
           echo "Application version did not become PROCESSED." >&2
           exit 1
-
       - name: Discard blocking VCS run before GitHub CD
         run: |
           set -euo pipefail
@@ -639,11 +638,13 @@ jobs:
           exit 1
 
   deploy-staging:
-    name: Deploy shoc-backend-staging to Elastic Beanstalk
+    name: Deploy shoc-backend-staging through Terraform
     if: >
-      github.event_name == 'workflow_dispatch' && github.ref == 'refs/heads/staging'
+      (github.event_name == 'push' && github.ref == 'refs/heads/staging') ||
+      (github.event_name == 'workflow_dispatch' && github.ref == 'refs/heads/staging')
     needs: validate
     runs-on: ubuntu-latest
+    timeout-minutes: 180
     permissions:
       contents: read
       id-token: write
@@ -652,28 +653,17 @@ jobs:
     concurrency:
       group: deploy-staging
       cancel-in-progress: false
+    env:
+      TF_CLOUD_ORGANIZATION: seahaven
+      TF_API_TOKEN: ${{ secrets.TF_API_TOKEN }}
+      EB_APPLICATION_NAME: shoc-backend
+      EB_ENVIRONMENT_NAME: shoc-backend-staging
+      SMOKE_URL: https://api.staging.seahaven.com
+      EB_BUCKET: elasticbeanstalk-us-east-1-396287094661
     steps:
       - name: Checkout
         uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
 
-      - name: Resolve deploy target
-        id: target
-        run: |
-          set -euo pipefail
-          application=shoc-backend
-          environment=shoc-backend-staging
-          smoke_url=https://api.staging.seahaven.com
-          {
-            echo "application=${application}"
-            echo "environment=${environment}"
-            echo "smoke_url=${smoke_url}"
-          } >> "${GITHUB_OUTPUT}"
-          {
-            echo "EB_APPLICATION_NAME=${application}"
-            echo "EB_ENVIRONMENT_NAME=${environment}"
-            echo "SMOKE_URL=${smoke_url}"
-          } >> "${GITHUB_ENV}"
-
       - name: Set up .NET
         uses: actions/setup-dotnet@a98b56852c35b8e3190ac28c8c2271da59106c68 # v6.0.0
         with:
@@ -703,26 +693,227 @@ jobs:
           echo "$prev" > .artifacts/elastic-beanstalk/previous-version.txt
           echo "Previous version label: $prev"
 
-      - name: Deploy prebuilt bundle to existing environment
+      - name: Assign immutable release identity
-        uses: aws-actions/aws-elasticbeanstalk-deploy@7883cdd454c162051bf6fc13389536b045149b4c # v1.0.8
+        id: release
+        run: |
+          set -euo pipefail
+          version_label="${GITHUB_SHA}-${GITHUB_RUN_ID}-${GITHUB_RUN_ATTEMPT}"
+          s3_key="shoc-backend/releases/staging/${GITHUB_SHA}/${GITHUB_RUN_ID}-${GITHUB_RUN_ATTEMPT}/site.zip"
+          {
+            echo "version_label=${version_label}"
+            echo "s3_key=${s3_key}"
+          } >> "${GITHUB_OUTPUT}"
+
+      - name: Upload immutable bundle
+        run: |
+          set -euo pipefail
+          aws s3 cp .artifacts/elastic-beanstalk/site.zip \
+            "s3://${EB_BUCKET}/${{ steps.release.outputs.s3_key }}" \
+            --region us-east-1
+
+      - name: Create Elastic Beanstalk application version
+        run: |
+          set -euo pipefail
+          aws elasticbeanstalk create-application-version \
+            --application-name "${EB_APPLICATION_NAME}" \
+            --version-label "${{ steps.release.outputs.version_label }}" \
+            --description "GitHub Actions ${GITHUB_SERVER_URL}/${GITHUB_REPOSITORY}/actions/runs/${GITHUB_RUN_ID} attempt ${GITHUB_RUN_ATTEMPT}" \
+            --source-bundle "S3Bucket=${EB_BUCKET},S3Key=${{ steps.release.outputs.s3_key }}" \
+            --process \
+            --region us-east-1
+
+          status="UNPROCESSED"
+          for _ in $(seq 1 36); do
+            status="$(aws elasticbeanstalk describe-application-versions \
+              --application-name "${EB_APPLICATION_NAME}" \
+              --version-labels "${{ steps.release.outputs.version_label }}" \
+              --region us-east-1 \
+              --query 'ApplicationVersions[0].Status' \
+              --output text)"
+            echo "application version status: $status"
+            if [ "$status" = "PROCESSED" ]; then
+              exit 0
+            fi
+            if [ "$status" = "FAILED" ]; then
+              echo "Elastic Beanstalk failed to process ${{ steps.release.outputs.version_label }}." >&2
+              exit 1
+            fi
+            sleep 5
+          done
+          echo "Application version did not become PROCESSED." >&2
+          exit 1
+
+      - name: Discard blocking VCS run before GitHub CD
+        run: |
+          set -euo pipefail
+          python3 << 'PY'
+          import json, os, urllib.error, urllib.request
+
+          token = os.environ["TF_API_TOKEN"]
+          workspace = "shoc-backend-staging"
+          headers = {
+              "Authorization": f"Bearer {token}",
+              "Content-Type": "application/vnd.api+json",
+          }
+
+          def get(url):
+              req = urllib.request.Request(url, headers=headers)
+              with urllib.request.urlopen(req) as resp:
+                  return json.load(resp)
+
+          def post(url, payload):
+              data = json.dumps(payload).encode()
+              req = urllib.request.Request(
+                  url, data=data, method="POST", headers=headers
+              )
+              try:
+                  with urllib.request.urlopen(req) as resp:
+                      return resp.status
+              except urllib.error.HTTPError as exc:
+                  if exc.code in (409, 404):
+                      body = exc.read().decode("utf-8", "replace")
+                      print(f"discard returned HTTP {exc.code}: {body}")
+                      return exc.code
+                  raise
+
+          ws = get(
+              f"https://app.terraform.io/api/v2/organizations/seahaven/workspaces/{workspace}"
+          )["data"]
+          attrs = ws["attributes"]
+          if attrs.get("auto-apply") is True:
+              raise SystemExit("shoc-backend-staging auto-apply is on; refuse to continue")
+          if not attrs.get("speculative-enabled"):
+              raise SystemExit("speculative plans are off; refuse to continue")
+          if (attrs.get("vcs-repo") or {}).get("tags-regex"):
+              raise SystemExit("tag-based VCS triggering is set; refuse to continue")
+          expected_patterns = [
+              "terraform/live/staging/**",
+              "terraform/live/modules/**",
+          ]
+          if attrs.get("trigger-patterns") != expected_patterns:
+              raise SystemExit(
+                  "trigger-patterns must be "
+                  f"{expected_patterns}; got {attrs.get('trigger-patterns')}"
+              )
+          if not attrs.get("locked"):
+              print("workspace is unlocked")
+              raise SystemExit(0)
+
+          current = (
+              ws.get("relationships", {})
+              .get("current-run", {})
+              .get("data")
+          )
+          if not current:
+              raise SystemExit("workspace is locked without a current run")
+          run_id = current["id"]
+          run = get(f"https://app.terraform.io/api/v2/runs/{run_id}")["data"]
+          run_attrs = run["attributes"]
+          status = run_attrs.get("status")
+          plan_only = run_attrs.get("plan-only")
+          print(f"current run {run_id} status={status} plan-only={plan_only}")
+          if plan_only:
+              print("speculative run does not block GitHub CD")
+              raise SystemExit(0)
+          if status in {"applying", "apply_queued"}:
+              raise SystemExit(f"{run_id} is {status}; wait, do not discard an apply")
+          discardable = {
+              "pending", "planned", "cost_estimated", "policy_checked", "policy_override"
+          }
+          if status not in discardable:
+              raise SystemExit(f"{run_id} status {status} is not discardable")
+          code = post(
+              f"https://app.terraform.io/api/v2/runs/{run_id}/actions/discard",
+              {"comment": "Discarded so GitHub CD can create the version-only applyable run"},
+          )
+          print(f"discarded {run_id} http={code}")
+          PY
+
+      - name: Create Terraform release run
+        id: release-run
+        uses: hashicorp/tfc-workflows-github/actions/create-run@8e08d1ba957673f5fbf971a22b3219639dc45661 # v1.3.2
+        env:
+          TF_VAR_release_version_label: '"${{ steps.release.outputs.version_label }}"'
         with:
-          aws-region: us-east-1
+          workspace: shoc-backend-staging
-          application-name: ${{ steps.target.outputs.application }}
+          message: "Release ${{ steps.release.outputs.version_label }} from GitHub Actions"
-          environment-name: ${{ steps.target.outputs.environment }}
+
-          version-label: ${{ github.sha }}-${{ github.run_id }}-${{ github.run_attempt }}
+      - name: Read Terraform release plan counts
-          deployment-package-path: .artifacts/elastic-beanstalk/site.zip
+        id: release-plan
-          s3-bucket-name: elasticbeanstalk-us-east-1-396287094661
+        uses: hashicorp/tfc-workflows-github/actions/plan-output@8e08d1ba957673f5fbf971a22b3219639dc45661 # v1.3.2
-          create-application-if-not-exists: "false"
+        with:
-          create-environment-if-not-exists: "false"
+          plan: ${{ steps.release-run.outputs.plan_id }}
-          create-s3-bucket-if-not-exists: "false"
+
-          use-existing-application-version-if-available: "false"
+      - name: Reject non-version-only resource counts
-          wait-for-deployment: "true"
+        env:
-          wait-for-environment-recovery: "true"
+          PLAN_ADD: ${{ steps.release-plan.outputs.add }}
+          PLAN_CHANGE: ${{ steps.release-plan.outputs.change }}
+          PLAN_DESTROY: ${{ steps.release-plan.outputs.destroy }}
+        run: |
+          set -euo pipefail
+          if [ "$PLAN_ADD" != "0" ] || [ "$PLAN_CHANGE" != "1" ] || [ "$PLAN_DESTROY" != "0" ]; then
+            echo "HCP plan counts are add=${PLAN_ADD} change=${PLAN_CHANGE} destroy=${PLAN_DESTROY}; expected 0/1/0." >&2
+            exit 1
+          fi
+
+      - name: Guard version-only Terraform plan
+        run: |
+          set -euo pipefail
+          python scripts/check-terraform-release-plan.py \
+            --plan-id "${{ steps.release-run.outputs.plan_id }}" \
+            --expected-version-label "${{ steps.release.outputs.version_label }}"
+
+      - name: Discard release run when the guard fails
+        if: failure() && steps.release-run.outcome == 'success'
+        uses: hashicorp/tfc-workflows-github/actions/discard-run@8e08d1ba957673f5fbf971a22b3219639dc45661 # v1.3.2
+        with:
+          run: ${{ steps.release-run.outputs.run_id }}
+          comment: Rejected by the version-only plan guard from GitHub Actions
+
+      - name: Apply Terraform release run
+        id: release-apply
+        continue-on-error: true
+        uses: hashicorp/tfc-workflows-github/actions/apply-run@8e08d1ba957673f5fbf971a22b3219639dc45661 # v1.3.2
+        with:
+          run: ${{ steps.release-run.outputs.run_id }}
+          comment: Apply version-only release from GitHub Actions ${{ github.sha }}
+
+      - name: Treat already-applied release run as success
+        env:
+          APPLY_OUTCOME: ${{ steps.release-apply.outcome }}
+          RUN_ID: ${{ steps.release-run.outputs.run_id }}
+        run: |
+          set -euo pipefail
+          if [ "$APPLY_OUTCOME" = "success" ]; then
+            echo "Apply succeeded."
+            exit 0
+          fi
+          python3 << 'PY'
+          import json, os, urllib.request
+          run_id = os.environ["RUN_ID"]
+          token = os.environ["TF_API_TOKEN"]
+          req = urllib.request.Request(
+              f"https://app.terraform.io/api/v2/runs/{run_id}",
+              headers={
+                  "Authorization": f"Bearer {token}",
+                  "Content-Type": "application/vnd.api+json",
+              },
+          )
+          with urllib.request.urlopen(req) as resp:
+              status = json.load(resp)["data"]["attributes"]["status"]
+          print(f"HCP run {run_id} status={status}")
+          if status == "applied":
+              raise SystemExit(0)
+          raise SystemExit(
+              f"Apply failed: GitHub outcome={os.environ['APPLY_OUTCOME']} "
+              f"HCP status={status}"
+          )
+          PY
 
       - name: Verify exact application version is active
         run: |
           set -euo pipefail
-          expected="${{ github.sha }}-${{ github.run_id }}-${{ github.run_attempt }}"
+          expected="${{ steps.release.outputs.version_label }}"
           status="Unknown"
           current="Unknown"
           health="Unknown"
@@ -825,15 +1016,199 @@ jobs:
             echo "Environment is already on previous version $prev."
             exit 0
           fi
+          if [[ ! "$prev" =~ ^[0-9a-f]{40}-[0-9]+-[0-9]+$ ]]; then
+            echo "Previous version $prev is not a Terraform-managed release label; cannot roll back through HCP." >&2
+            exit 1
+          fi
+          echo "rollback_label=$prev" >> "${GITHUB_OUTPUT}"
+        id: rollback-prepare
 
-          echo "Restoring ${EB_ENVIRONMENT_NAME} application code to version label: $prev"
+      - name: Discard blocking VCS run before GitHub rollback
+        id: rollback-discard-vcs
+        if: failure() && steps.rollback-prepare.outputs.rollback_label != ''
+        run: |
+          set -euo pipefail
+          python3 << 'PY'
+          import json, os, urllib.error, urllib.request
+
+          token = os.environ["TF_API_TOKEN"]
+          workspace = "shoc-backend-staging"
+          headers = {
+              "Authorization": f"Bearer {token}",
+              "Content-Type": "application/vnd.api+json",
+          }
+
+          def get(url):
+              req = urllib.request.Request(url, headers=headers)
+              with urllib.request.urlopen(req) as resp:
+                  return json.load(resp)
+
+          def post(url, payload):
+              data = json.dumps(payload).encode()
+              req = urllib.request.Request(
+                  url, data=data, method="POST", headers=headers
+              )
+              try:
+                  with urllib.request.urlopen(req) as resp:
+                      return resp.status
+              except urllib.error.HTTPError as exc:
+                  if exc.code in (409, 404):
+                      body = exc.read().decode("utf-8", "replace")
+                      print(f"discard returned HTTP {exc.code}: {body}")
+                      return exc.code
+                  raise
+
+          ws = get(
+              f"https://app.terraform.io/api/v2/organizations/seahaven/workspaces/{workspace}"
+          )["data"]
+          attrs = ws["attributes"]
+          if attrs.get("auto-apply") is True:
+              raise SystemExit("shoc-backend-staging auto-apply is on; refuse to continue")
+          if not attrs.get("speculative-enabled"):
+              raise SystemExit("speculative plans are off; refuse to continue")
+          if (attrs.get("vcs-repo") or {}).get("tags-regex"):
+              raise SystemExit("tag-based VCS triggering is set; refuse to continue")
+          expected_patterns = [
+              "terraform/live/staging/**",
+              "terraform/live/modules/**",
+          ]
+          if attrs.get("trigger-patterns") != expected_patterns:
+              raise SystemExit(
+                  "trigger-patterns must be "
+                  f"{expected_patterns}; got {attrs.get('trigger-patterns')}"
+              )
+          if not attrs.get("locked"):
+              print("workspace is unlocked")
+              raise SystemExit(0)
+
+          current = (
+              ws.get("relationships", {})
+              .get("current-run", {})
+              .get("data")
+          )
+          if not current:
+              raise SystemExit("workspace is locked without a current run")
+          run_id = current["id"]
+          run = get(f"https://app.terraform.io/api/v2/runs/{run_id}")["data"]
+          run_attrs = run["attributes"]
+          status = run_attrs.get("status")
+          plan_only = run_attrs.get("plan-only")
+          print(f"current run {run_id} status={status} plan-only={plan_only}")
+          if plan_only:
+              print("speculative run does not block GitHub CD")
+              raise SystemExit(0)
+          if status in {"applying", "apply_queued"}:
+              raise SystemExit(f"{run_id} is {status}; wait, do not discard an apply")
+          discardable = {
+              "pending", "planned", "cost_estimated", "policy_checked", "policy_override"
+          }
+          if status not in discardable:
+              raise SystemExit(f"{run_id} status {status} is not discardable")
+          code = post(
+              f"https://app.terraform.io/api/v2/runs/{run_id}/actions/discard",
+              {"comment": "Discarded so GitHub CD can create the version-only applyable run"},
+          )
+          print(f"discarded {run_id} http={code}")
+          PY
+
+      - name: Create Terraform rollback run
+        id: rollback-run
+        if: failure() && steps.rollback-prepare.outputs.rollback_label != '' && steps.rollback-discard-vcs.outcome == 'success'
+        uses: hashicorp/tfc-workflows-github/actions/create-run@8e08d1ba957673f5fbf971a22b3219639dc45661 # v1.3.2
+        env:
+          TF_VAR_release_version_label: '"${{ steps.rollback-prepare.outputs.rollback_label }}"'
+        with:
+          workspace: shoc-backend-staging
+          message: "Rollback to ${{ steps.rollback-prepare.outputs.rollback_label }} from GitHub Actions"
+      - name: Read Terraform rollback plan counts
+        id: rollback-plan
+        if: failure() && steps.rollback-run.outcome == 'success'
+        uses: hashicorp/tfc-workflows-github/actions/plan-output@8e08d1ba957673f5fbf971a22b3219639dc45661 # v1.3.2
+        with:
+          plan: ${{ steps.rollback-run.outputs.plan_id }}
+
+      - name: Reject non-version-only rollback counts
+        id: rollback-count-guard
+        if: failure() && steps.rollback-plan.outcome == 'success'
+        env:
+          PLAN_ADD: ${{ steps.rollback-plan.outputs.add }}
+          PLAN_CHANGE: ${{ steps.rollback-plan.outputs.change }}
+          PLAN_DESTROY: ${{ steps.rollback-plan.outputs.destroy }}
+        run: |
+          set -euo pipefail
+          if [ "$PLAN_ADD" != "0" ] || [ "$PLAN_CHANGE" != "1" ] || [ "$PLAN_DESTROY" != "0" ]; then
+            echo "Rollback HCP plan counts are add=${PLAN_ADD} change=${PLAN_CHANGE} destroy=${PLAN_DESTROY}; expected 0/1/0." >&2
+            exit 1
+          fi
+
+      - name: Guard version-only Terraform rollback plan
+        id: rollback-json-guard
+        if: failure() && steps.rollback-count-guard.outcome == 'success'
+        run: |
+          set -euo pipefail
+          python scripts/check-terraform-release-plan.py \
+            --plan-id "${{ steps.rollback-run.outputs.plan_id }}" \
+            --expected-version-label "${{ steps.rollback-prepare.outputs.rollback_label }}"
+
+      - name: Discard rollback run when the guard fails
+        if: failure() && steps.rollback-run.outcome == 'success' && steps.rollback-json-guard.outcome != 'success'
+        uses: hashicorp/tfc-workflows-github/actions/discard-run@8e08d1ba957673f5fbf971a22b3219639dc45661 # v1.3.2
+        with:
+          run: ${{ steps.rollback-run.outputs.run_id }}
+          comment: Rejected by the version-only rollback plan guard from GitHub Actions
+
+      - name: Apply Terraform rollback run
+        id: rollback-apply
+        if: failure() && steps.rollback-json-guard.outcome == 'success'
+        continue-on-error: true
+        uses: hashicorp/tfc-workflows-github/actions/apply-run@8e08d1ba957673f5fbf971a22b3219639dc45661 # v1.3.2
+        with:
+          run: ${{ steps.rollback-run.outputs.run_id }}
+          comment: Apply version-only rollback from GitHub Actions ${{ github.sha }}
+
+      - name: Treat already-applied rollback run as success
+        id: rollback-apply-result
+        if: failure() && steps.rollback-apply.outcome != 'skipped'
+        env:
+          APPLY_OUTCOME: ${{ steps.rollback-apply.outcome }}
+          RUN_ID: ${{ steps.rollback-run.outputs.run_id }}
+        run: |
+          set -euo pipefail
+          if [ "$APPLY_OUTCOME" = "success" ]; then
+            echo "Apply succeeded."
+            exit 0
+          fi
+          python3 << 'PY'
+          import json, os, urllib.request
+          run_id = os.environ["RUN_ID"]
+          token = os.environ["TF_API_TOKEN"]
+          req = urllib.request.Request(
+              f"https://app.terraform.io/api/v2/runs/{run_id}",
+              headers={
+                  "Authorization": f"Bearer {token}",
+                  "Content-Type": "application/vnd.api+json",
+              },
+          )
+          with urllib.request.urlopen(req) as resp:
+              status = json.load(resp)["data"]["attributes"]["status"]
+          print(f"HCP run {run_id} status={status}")
+          if status == "applied":
+              raise SystemExit(0)
+          raise SystemExit(
+              f"Apply failed: GitHub outcome={os.environ['APPLY_OUTCOME']} "
+              f"HCP status={status}"
+          )
+          PY
+
+      - name: Verify previous application version is active
+        if: failure() && steps.rollback-apply-result.outcome == 'success'
+        run: |
+          set -euo pipefail
+          prev="${{ steps.rollback-prepare.outputs.rollback_label }}"
           echo "Database migrations are not reverted; deployable migrations must follow the expand/contract policy."
-          aws elasticbeanstalk update-environment \
+          status="Unknown"
-            --environment-name "${EB_ENVIRONMENT_NAME}" \
+          current="Unknown"
-            --version-label "$prev" \
+          health="Unknown"
-            --region us-east-1
-
-          echo "Waiting for previous version to become healthy..."
           for _ in $(seq 1 80); do
             read -r status current health < <(
               aws elasticbeanstalk describe-environments \
@@ -859,6 +1234,5 @@ jobs:
             fi
             sleep 15
           done
-
           echo "Environment did not return to Ready and healthy within the rollback window (last seen: status=$status version=$current health=$health)." >&2
           exit 1

scripts/check-terraform-import-plan.py

@@ -10,8 +10,10 @@ from pathlib import Path
 
 from terraform_import_plan_resources import (
     DEV_IMPORT_BASELINE,
-    DEV_IMPORT_IDS,
+    IMPORT_BASELINES,
+    IMPORT_IDS,
     REQUIRED_RESOURCES,
+    STAGING_IMPORT_BASELINE,
 )
 
 
@@ -92,6 +94,51 @@ def validate_dev_import_baseline(
             )
 
 
+def validate_staging_import_baseline(
+    resources_by_address: dict[str, dict], violations: list[str]
+) -> None:
+    environment_address = (
+        "module.environment.aws_elastic_beanstalk_environment.this"
+    )
+    route_address = "module.environment.aws_route53_record.api_cname[0]"
+    expected_tags = STAGING_IMPORT_BASELINE["environment_tags"]
+    expected_cname = STAGING_IMPORT_BASELINE["api_cname"]
+
+    for side in ("before", "after"):
+        environment = (
+            resources_by_address.get(environment_address, {})
+            .get("change", {})
+            .get(side)
+            or {}
+        )
+        if environment.get("tags") != expected_tags:
+            violations.append(
+                f"{environment_address}: {side} environment tags do not match "
+                f"the exact staging import baseline"
+            )
+        if environment.get("setting") != []:
+            violations.append(
+                f"{environment_address}: {side} contains managed EB settings "
+                "during the import-only phase"
+            )
+
+        route = (
+            resources_by_address.get(route_address, {})
+            .get("change", {})
+            .get(side)
+            or {}
+        )
+        actual_cname = {
+            "records": route.get("records"),
+            "ttl": route.get("ttl"),
+        }
+        if actual_cname != expected_cname:
+            violations.append(
+                f"{route_address}: {side} CNAME does not match the exact "
+                "live ALB target and TTL"
+            )
+
+
 def main() -> int:
     args = parse_args()
     plan = json.loads(args.plan_json.read_text(encoding="utf-8"))
@@ -143,13 +190,14 @@ def main() -> int:
                     f"{address}: update is not explicitly allowlisted"
                 )
 
-        if initial_import and args.environment == "dev":
+        if initial_import and args.environment in IMPORT_IDS:
             if actions != {"no-op"}:
                 violations.append(
-                    f"{address}: initial dev import actions must be ['no-op'], "
+                    f"{address}: initial {args.environment} import actions "
+                    "must be ['no-op'], "
                     f"got {sorted(actions)}"
                 )
-            expected_import_id = DEV_IMPORT_IDS.get(address)
+            expected_import_id = IMPORT_IDS[args.environment].get(address)
             actual_import_id = (
                 resource.get("change", {}).get("importing") or {}
             ).get("id")
@@ -167,6 +215,8 @@ def main() -> int:
 
     if initial_import and args.environment == "dev":
         validate_dev_import_baseline(resources_by_address, violations)
+    elif initial_import and args.environment == "staging":
+        validate_staging_import_baseline(resources_by_address, violations)
 
     if violations:
         print("FAIL: live Terraform plan is not import-safe", file=sys.stderr)
@@ -191,8 +241,8 @@ def main() -> int:
                 for address, resource in sorted(resources_by_address.items())
             },
         }
-        if args.environment == "dev" and initial_import:
+        if args.environment in IMPORT_BASELINES and initial_import:
-            evidence["asserted_live_baseline"] = DEV_IMPORT_BASELINE
+            evidence["asserted_live_baseline"] = IMPORT_BASELINES[args.environment]
         args.evidence_out.write_text(
             json.dumps(evidence, indent=2, sort_keys=True) + "\n",
             encoding="utf-8",

scripts/terraform_import_plan_resources.py

@@ -65,3 +65,54 @@ DEV_IMPORT_BASELINE = {
         "evaluate_target_health": True,
     },
 }
+
+STAGING_IMPORT_IDS = {
+    "module.environment.aws_elastic_beanstalk_environment.this": "e-6c9m4vb62z",
+    "module.environment.aws_iam_instance_profile.runtime": "shoc-backend-staging",
+    "module.environment.aws_iam_role.github_deploy": (
+        "githubdeploy-shoc-backend-staging"
+    ),
+    "module.environment.aws_iam_role.runtime": "shoc-backend-staging",
+    "module.environment.aws_iam_role_policy.github_deploy": (
+        "githubdeploy-shoc-backend-staging:GithubDeployRoleDefaultPolicyE8F540D1"
+    ),
+    "module.environment.aws_iam_role_policy.runtime_app_config": (
+        "shoc-backend-staging:shoc-staging-secrets-read"
+    ),
+    "module.environment.aws_iam_role_policy.runtime_webhook[0]": (
+        "shoc-backend-staging:shoc-backend-staging-webhook-secret-access"
+    ),
+    "module.environment.aws_iam_role_policy_attachment.web_tier": (
+        "shoc-backend-staging/arn:aws:iam::aws:policy/AWSElasticBeanstalkWebTier"
+    ),
+    "module.environment.aws_secretsmanager_secret.app_config": (
+        "arn:aws:secretsmanager:us-east-1:396287094661:secret:"
+        "shoc/staging/app-config-CVV99L"
+    ),
+    "module.environment.aws_route53_record.api_cname[0]": (
+        "Z02602739VQWBWCAGXP4_api.staging.seahaven.com_CNAME"
+    ),
+}
+
+STAGING_IMPORT_BASELINE = {
+    "environment_tags": {
+        "env": "staging",
+        "project": "shoc",
+    },
+    "api_cname": {
+        "records": [
+            "awseb--AWSEB-pPXqiRgNnZe8-16996010.us-east-1.elb.amazonaws.com"
+        ],
+        "ttl": 60,
+    },
+}
+
+IMPORT_IDS = {
+    "dev": DEV_IMPORT_IDS,
+    "staging": STAGING_IMPORT_IDS,
+}
+
+IMPORT_BASELINES = {
+    "dev": DEV_IMPORT_BASELINE,
+    "staging": STAGING_IMPORT_BASELINE,
+}

scripts/test-terraform-import-plan-check.py

@@ -11,8 +11,9 @@ from pathlib import Path
 
 from terraform_import_plan_resources import (
     DEV_IMPORT_BASELINE,
-    DEV_IMPORT_IDS,
+    IMPORT_IDS,
     REQUIRED_RESOURCES,
+    STAGING_IMPORT_BASELINE,
 )
 
 SCRIPT = Path(__file__).with_name("check-terraform-import-plan.py")
@@ -36,29 +37,40 @@ def run_case(
                 continue
             actions = (actions_by_address or {}).get(address, ["no-op"])
             change: dict[str, object] = {"actions": actions}
-            if environment == "dev":
+            if environment in IMPORT_IDS:
                 change["importing"] = {
                     "id": (import_id_overrides or {}).get(
-                        address, DEV_IMPORT_IDS[address]
+                        address, IMPORT_IDS[environment][address]
                     )
                 }
-                if (
+                if address == (
-                    address
+                    "module.environment.aws_elastic_beanstalk_environment.this"
-                    == "module.environment.aws_elastic_beanstalk_environment.this"
                 ):
+                    baseline = (
+                        DEV_IMPORT_BASELINE
+                        if environment == "dev"
+                        else STAGING_IMPORT_BASELINE
+                    )
                     state: dict[str, object] = {
-                        "tags": DEV_IMPORT_BASELINE["environment_tags"],
+                        "tags": baseline["environment_tags"],
                         "setting": [],
                     }
                     change["before"] = state
                     change["after"] = state
-                elif (
+                elif environment == "dev" and (
                     address
                     == "module.environment.aws_route53_record.api_alias[0]"
                 ):
                     state = {"alias": [DEV_IMPORT_BASELINE["api_alias"]]}
                     change["before"] = state
                     change["after"] = state
+                elif environment == "staging" and (
+                    address
+                    == "module.environment.aws_route53_record.api_cname[0]"
+                ):
+                    state = STAGING_IMPORT_BASELINE["api_cname"]
+                    change["before"] = state
+                    change["after"] = state
                 if address in (state_overrides or {}):
                     change["before"] = (state_overrides or {})[address]
                     change["after"] = (state_overrides or {})[address]
@@ -177,6 +189,59 @@ def main() -> int:
             ),
             1,
         ),
+        (
+            "wrong staging import id",
+            run_case(
+                "staging",
+                import_id_overrides={controlled_address: "wrong-role"},
+            ),
+            1,
+        ),
+        (
+            "wrong staging environment tags",
+            run_case(
+                "staging",
+                state_overrides={
+                    "module.environment.aws_elastic_beanstalk_environment.this": {
+                        "tags": {
+                            "Name": "shoc-backend-staging",
+                            "env": "staging",
+                            "project": "shoc",
+                        },
+                        "setting": [],
+                    }
+                },
+            ),
+            1,
+        ),
+        (
+            "staging managed settings during import",
+            run_case(
+                "staging",
+                state_overrides={
+                    "module.environment.aws_elastic_beanstalk_environment.this": {
+                        "tags": STAGING_IMPORT_BASELINE["environment_tags"],
+                        "setting": [{"name": "ASPNETCORE_ENVIRONMENT"}],
+                    }
+                },
+            ),
+            1,
+        ),
+        (
+            "wrong staging cname",
+            run_case(
+                "staging",
+                state_overrides={
+                    "module.environment.aws_route53_record.api_cname[0]": {
+                        "records": [
+                            "shoc-backend-staging.us-east-1.elasticbeanstalk.com"
+                        ],
+                        "ttl": 60,
+                    }
+                },
+            ),
+            1,
+        ),
         (
             "controlled update",
             run_case(

terraform/live/README.md

@@ -153,8 +153,10 @@ cannot lock the workspace out from under GitHub CD. GitHub applies only after
 `plan-output` counts are `0/1/0` and
 `scripts/check-terraform-release-plan.py` accepts a version-only plan JSON.
 
-Staging keeps today's direct Elastic Beanstalk deploy path until staging
+Staging application CD uses the same guarded lane against workspace
-adoption.
+`shoc-backend-staging`. The workspace stays branch-based on `staging` with
+trigger patterns `terraform/live/staging/**` and `terraform/live/modules/**`,
+and GitHub deploys on pushes to `staging` and on manual `workflow_dispatch`.
 
 ### Credentials and enablement
 
@@ -187,8 +189,10 @@ identifiers make accidental cross-environment reuse fail review and planning.
 ## Safety invariants
 
 - Auto-apply remains off.
-- VCS stays branch-based on `dev` with speculative PR plans enabled and
+- VCS stays branch-based on `dev` for `shoc-backend-dev` and on `staging` for
-  trigger patterns `terraform/live/dev/**` and `terraform/live/modules/**`.
+  `shoc-backend-staging`, with speculative PR plans enabled and trigger
-  Do not switch Automatic Run Triggering to tag-based.
+  patterns `terraform/live/dev/**` (dev) and `terraform/live/staging/**`
+  (staging), each alongside `terraform/live/modules/**`. Do not switch
+  Automatic Run Triggering to tag-based.
 - Org baseline owns final HCP plan/apply permissions and manager tags.
 - Every imported Terraform resource has `prevent_destroy`.

terraform/live/modules/environment-owned/main.tf

@@ -500,7 +500,9 @@ resource "aws_route53_record" "api_cname" {
   name    = var.api_domain
   type    = "CNAME"
   ttl     = 60
-  records = [aws_elastic_beanstalk_environment.this.endpoint_url]
+  records = [
+    var.api_cname_target == null ? aws_elastic_beanstalk_environment.this.endpoint_url : var.api_cname_target,
+  ]
 
   lifecycle {
     prevent_destroy = true

terraform/live/modules/environment-owned/variables.tf

@@ -242,6 +242,12 @@ variable "api_alias_target" {
   default     = null
 }
 
+variable "api_cname_target" {
+  type        = string
+  description = "Exact existing Route 53 CNAME target preserved during import. Null resolves the target from Elastic Beanstalk."
+  default     = null
+}
+
 variable "metadata_before_adoption" {
   description = "Exact current metadata preserved while adoption_complete is false."
   type = object({

terraform/live/staging/main.tf

@@ -27,6 +27,7 @@ module "environment" {
   aws_region                             = local.aws_region
   environment                            = "staging"
   adoption_complete                      = false
+  manage_eb_settings                     = false
   eb_application_name                    = local.eb_application_name
   eb_environment_name                    = local.eb_environment_name
   eb_environment_id                      = local.eb_environment_id
@@ -60,6 +61,8 @@ module "environment" {
   hosted_zone_id            = "Z02602739VQWBWCAGXP4"
   api_domain                = local.api_domain
   api_record_type           = "CNAME"
+  api_cname_target          = "awseb--AWSEB-pPXqiRgNnZe8-16996010.us-east-1.elb.amazonaws.com"
+  release_version_label     = var.release_version_label
   metadata_before_adoption = {
     runtime_role_description = "SHOC backend staging compute role (EB instance profile)"
     runtime_role_tags = {
@@ -81,7 +84,6 @@ module "environment" {
       Project               = "shoc-backend"
     }
     environment_tags = {
-      Name    = "shoc-backend-staging"
       env     = "staging"
       project = "shoc"
     }

terraform/live/staging/variables.tf

@@ -0,0 +1,15 @@
+variable "release_version_label" {
+  type     = string
+  default  = null
+  nullable = true
+
+  description = "Immutable Elastic Beanstalk application version. Null VCS plans leave the live version unchanged."
+
+  validation {
+    condition = (
+      var.release_version_label == null ||
+      can(regex("^[0-9a-f]{40}-[0-9]+-[0-9]+$", var.release_version_label))
+    )
+    error_message = "release_version_label must be <full-sha>-<run-id>-<attempt>."
+  }
+}