ci: extract external E2E into dedicated post-merge workflow (#38426)

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: yyh <yuanyouhuilyz@gmail.com>

.github/workflows/main-ci.yml

@@ -6,8 +6,6 @@ on:
   merge_group:
     branches: ["main"]
     types: [checks_requested]
-  push:
-    branches: ["main"]
 
 permissions:
   actions: write
@@ -44,7 +42,6 @@ jobs:
       api-changed: ${{ steps.changes.outputs.api }}
       cli-changed: ${{ steps.changes.outputs.cli }}
       e2e-changed: ${{ steps.changes.outputs.e2e }}
-      external-e2e-changed: ${{ steps.changes.outputs.external_e2e }}
       web-changed: ${{ steps.changes.outputs.web }}
       vdb-changed: ${{ steps.changes.outputs.vdb }}
       migration-changed: ${{ steps.changes.outputs.migration }}
@@ -100,25 +97,6 @@ jobs:
               - 'docker/envs/middleware.env.example'
               - '.github/workflows/web-e2e.yml'
               - '.github/actions/setup-web/**'
-            external_e2e:
-              - 'e2e/features/agent-v2/**'
-              - 'e2e/scripts/**'
-              - 'e2e/support/**'
-              - '.github/workflows/web-e2e.yml'
-              - '.github/actions/setup-web/**'
-              - 'dify-agent/**'
-              - 'api/clients/agent_backend/**'
-              - 'api/core/app/apps/agent_app/**'
-              - 'api/core/workflow/nodes/agent_v2/**'
-              - 'api/controllers/console/agent/**'
-              - 'api/services/agent/**'
-              - 'api/core/plugin/**'
-              - 'api/services/plugin/**'
-              - 'api/core/tools/**'
-              - 'api/services/tools/**'
-              - 'web/features/agent-v2/**'
-              - 'web/app/(commonLayout)/roster/**'
-              - 'web/app/components/workflow/nodes/agent-v2/**'
             vdb:
               - 'api/core/rag/datasource/**'
               - 'api/tests/integration_tests/vdb/**'
@@ -342,10 +320,8 @@ jobs:
     needs:
       - pre_job
       - check-changes
-    if: needs.pre_job.outputs.should_skip != 'true' && (needs.check-changes.outputs.e2e-changed == 'true' || needs.check-changes.outputs.external-e2e-changed == 'true')
+    if: needs.pre_job.outputs.should_skip != 'true' && needs.check-changes.outputs.e2e-changed == 'true'
     uses: ./.github/workflows/web-e2e.yml
-    with:
-      run-external-runtime: ${{ github.event_name == 'push' && github.ref == 'refs/heads/main' && needs.check-changes.outputs.external-e2e-changed == 'true' }}
     secrets: inherit
 
   web-e2e-skip:
@@ -353,7 +329,7 @@ jobs:
     needs:
       - pre_job
       - check-changes
-    if: needs.pre_job.outputs.should_skip != 'true' && needs.check-changes.outputs.e2e-changed != 'true' && needs.check-changes.outputs.external-e2e-changed != 'true'
+    if: needs.pre_job.outputs.should_skip != 'true' && needs.check-changes.outputs.e2e-changed != 'true'
     runs-on: depot-ubuntu-24.04
     steps:
       - name: Report skipped web full-stack e2e
@@ -372,7 +348,7 @@ jobs:
       - name: Finalize Web Full-Stack E2E status
         env:
           SHOULD_SKIP_WORKFLOW: ${{ needs.pre_job.outputs.should_skip }}
-          TESTS_CHANGED: ${{ needs.check-changes.outputs.e2e-changed == 'true' || needs.check-changes.outputs.external-e2e-changed == 'true' }}
+          TESTS_CHANGED: ${{ needs.check-changes.outputs.e2e-changed }}
           RUN_RESULT: ${{ needs.web-e2e-run.result }}
           SKIP_RESULT: ${{ needs.web-e2e-skip.result }}
         run: |

.github/workflows/post-merge.yml

@@ -0,0 +1,54 @@
+name: Post-Merge Checks
+
+on:
+  push:
+    branches: ["main"]
+
+permissions:
+  contents: read
+
+concurrency:
+  group: post-merge-${{ github.sha }}
+  cancel-in-progress: false
+
+jobs:
+  check-changes:
+    name: Check Changed Files
+    runs-on: depot-ubuntu-24.04
+    outputs:
+      external-e2e-changed: ${{ steps.changes.outputs.external_e2e }}
+    steps:
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+      - uses: dorny/paths-filter@fbd0ab8f3e69293af611ebaee6363fc25e6d187d # v4.0.1
+        id: changes
+        with:
+          filters: |
+            external_e2e:
+              - 'e2e/features/agent-v2/**'
+              - 'e2e/scripts/**'
+              - 'e2e/support/**'
+              - '.github/workflows/post-merge.yml'
+              - '.github/workflows/web-e2e.yml'
+              - '.github/actions/setup-web/**'
+              - 'dify-agent/**'
+              - 'api/clients/agent_backend/**'
+              - 'api/core/app/apps/agent_app/**'
+              - 'api/core/workflow/nodes/agent_v2/**'
+              - 'api/controllers/console/agent/**'
+              - 'api/services/agent/**'
+              - 'api/core/plugin/**'
+              - 'api/services/plugin/**'
+              - 'api/core/tools/**'
+              - 'api/services/tools/**'
+              - 'web/features/agent-v2/**'
+              - 'web/app/(commonLayout)/roster/**'
+              - 'web/app/components/workflow/nodes/agent-v2/**'
+
+  external-e2e:
+    name: External Runtime E2E
+    needs: check-changes
+    if: needs.check-changes.outputs.external-e2e-changed == 'true'
+    uses: ./.github/workflows/web-e2e.yml
+    with:
+      run-external-runtime: true
+    secrets: inherit