ci: skip smart E2E selection for PRs targeting stable branch

Author: jvbriones

.github/actions/smart-e2e-selection/action.yml

@@ -27,7 +27,7 @@ inputs:
     required: false
     default: 'false'
   base-ref:
-    description: 'PR base branch ref passed to the AI analysis script for diff comparison. When release/*, AI selection is skipped and the full E2E suite is selected.'
+    description: 'PR base branch ref passed to the AI analysis script for diff comparison. When release/* or stable, AI selection is skipped and the full E2E suite is selected.'
     required: false
     default: ''
 outputs:
@@ -57,15 +57,15 @@ runs:
           echo "⏭️ SKIP=true due to 'skip-smart-e2e-selection' label on PR"
         fi
 
-    - name: Check release target branch (full E2E, no AI selection)
+    - name: Check release or stable target branch (full E2E, no AI selection)
       id: check-release-target
       shell: bash
       run: |
         echo "SKIP=false" >> "$GITHUB_OUTPUT"
         BASE='${{ inputs.base-ref }}'
-        if [[ -n "$BASE" && "$BASE" == release/* ]]; then
+        if [[ -n "$BASE" && ( "$BASE" == release/* || "$BASE" == "stable" ) ]]; then
           echo "SKIP=true" >> "$GITHUB_OUTPUT"
-          echo "⏭️ Base branch is release/* — skipping AI E2E selection; full E2E suite will run"
+          echo "⏭️ Base branch is release/* or stable — skipping AI E2E selection; full E2E suite will run"
         fi
 
     - name: Checkout for PR analysis
@@ -142,9 +142,9 @@ runs:
           echo "SKIP_REASON=skip-smart-e2e-selection label found" >> "$GITHUB_OUTPUT"
           echo "ai_confidence=100" >> "$GITHUB_OUTPUT"
         elif [[ "${{ steps.check-release-target.outputs.SKIP }}" == "true" ]]; then
-          echo "⏭️ Skipping AI analysis - PR targets a release branch (release/*)"
+          echo "⏭️ Skipping AI analysis - PR targets a release or stable branch"
           echo "SKIPPED=true" >> "$GITHUB_OUTPUT"
-          echo "SKIP_REASON=PR targets a release branch (release/*)" >> "$GITHUB_OUTPUT"
+          echo "SKIP_REASON=PR targets a release or stable branch (release/* or stable)" >> "$GITHUB_OUTPUT"
           echo "ai_confidence=100" >> "$GITHUB_OUTPUT"
         else
           echo "✅ Running AI analysis for PR #$PR_NUMBER"

.github/guidelines/E2E_DECISION_TREE.md

@@ -56,7 +56,7 @@ Flakiness detection is applied to modified E2E test files in PRs:
 
 ## Release branches
 
-PRs to release branches (cherry-picked from main) are exempt from the following:
+PRs to release branches (cherry-picks from main to release/\* branches and PRs to stable branch) are exempt from the following:
 
 - Label `pr-not-ready-for-e2e` is not applied
 - Smart AI E2E selection is skipped - all E2E suites are run (if changes are not ignorable-only, e.g. only docs)

.github/workflows/auto-label-not-ready-for-e2e.yml

@@ -7,6 +7,7 @@ on:
     types: [opened]
     branches-ignore:
       - 'release/**'
+      - 'stable'
 
 jobs:
   add-label: