fix: skip dual approval check gracefully on dismissed reviews (#122)

* feat(release): add token permission pre-check

Detect missing write permissions early in the release pipeline rather
than failing late during git push with a cryptic 403 error (see PRI-348).

The new check-token-permissions job generates a GitHub App token and
attempts to create a test ref via the API. On 201 the token has write
permission (cleaned up immediately); on 403 the release job is skipped
with a clear error message. This saves CI time and provides actionable
diagnostics.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

* fix: skip dual approval check gracefully on dismissed reviews

When a pull_request_review event is dismissed, the PR context is null and
PR_NUMBER is empty. Instead of exiting with an error, exit 0 (skip) since
dismissed reviews are not approvals and do not affect the approval state.

Fixes PRI-314.

---------

Co-authored-by: Chris Farhood <chris@farhood.org>
Co-authored-by: Paperclip <noreply@paperclip.ing>

.github/workflows/dual-approval-check.yaml

@@ -51,8 +51,8 @@ jobs:
           REPO: ${{ github.repository }}
         run: |
           if [ -z "${PR_NUMBER}" ]; then
-            echo "::error::No pull request number found in event context. This workflow must be called from a pull_request or pull_request_review trigger."
-            exit 1
+            echo "::notice::No PR number in context (dismissed review?). Skipping dual approval check — no action needed."
+            exit 0
           fi
 
           echo "Checking approvals on PR #${PR_NUMBER} in ${REPO}"

.github/workflows/plugin-release.yaml

@@ -58,6 +58,46 @@ jobs:
     with:
       node-version: ${{ inputs.node-version }}
 
+  check-token-permissions:
+    needs: check-secrets
+    if: needs.check-secrets.outputs.ready == 'true'
+    runs-on: runners-privilegedescalation
+    outputs:
+      has_write: ${{ steps.check.outputs.has_write }}
+    steps:
+      - name: Generate GitHub App token
+        id: app-token
+        uses: actions/create-github-app-token@v3
+        with:
+          app-id: ${{ secrets.RELEASE_APP_ID }}
+          private-key: ${{ secrets.RELEASE_APP_PRIVATE_KEY }}
+
+      - name: Check write permissions via API
+        id: check
+        run: |
+          HTTP_CODE=$(curl -s -o /dev/null -w "%{http_code}" \
+            -X POST \
+            -H "Authorization: Bearer ${{ steps.app-token.outputs.token }}" \
+            -H "Accept: application/vnd.github+json" \
+            "https://api.github.com/repos/${{ github.repository }}/git/refs" \
+            -d '{"ref":"refs/heads/_release_check","sha":"${{ github.sha }}"}')
+          if [ "$HTTP_CODE" = "201" ]; then
+            echo "::notice::Token has write permission — cleaning up test ref."
+            curl -s -o /dev/null -w "%{http_code}" \
+              -X DELETE \
+              -H "Authorization: Bearer ${{ steps.app-token.outputs.token }}" \
+              "https://api.github.com/repos/${{ github.repository }}/git/refs/heads/_release_check"
+            echo "has_write=true" >> $GITHUB_OUTPUT
+          elif [ "$HTTP_CODE" = "403" ]; then
+            echo "::error::Token lacks write permission. Release cannot push tags or branches."
+            echo "has_write=false" >> $GITHUB_OUTPUT
+            exit 1
+          else
+            echo "::warning::Unexpected response ($HTTP_CODE) when checking write permission."
+            echo "has_write=false" >> $GITHUB_OUTPUT
+            exit 1
+          fi
+
   check-tag:
     needs: check-secrets
     if: needs.check-secrets.outputs.ready == 'true'
@@ -79,8 +119,8 @@ jobs:
           fi
 
   release:
-    needs: [ci, check-tag, check-secrets]
-    if: needs.check-secrets.outputs.ready == 'true' && needs.check-tag.outputs.skip != 'true'
+    needs: [ci, check-tag, check-secrets, check-token-permissions]
+    if: needs.check-secrets.outputs.ready == 'true' && needs.check-tag.outputs.skip != 'true' && needs.check-token-permissions.outputs.has_write == 'true'
     runs-on: runners-privilegedescalation
     timeout-minutes: 10