fix: code review workflows to checkout PR head commit (ydb-platform#2652)

Co-authored-by: copilot-swe-agent[bot] <[email protected]>
Co-authored-by: astandrik <[email protected]>

Author: Copilot

.github/copilot-instructions.md

@@ -98,6 +98,8 @@ This is a React-based monitoring and management interface for YDB clusters. The
 
 - Run `npm run lint` and `npm run typecheck` before committing
 - Follow conventional commit message format
+- Use conventional commit format for PR titles with lowercase subjects (e.g., "fix: update api endpoints", "feat: add new component", "chore: update dependencies")
+- PR title subjects must be lowercase (no proper nouns, sentence-case, start-case, pascal-case, or upper-case)
 - Ensure all user-facing text is internationalized
 - Test with a local YDB instance when possible
 

.github/workflows/claude-code-review.yml

@@ -9,8 +9,8 @@ jobs:
   claude-review:
     if: |
       github.event_name == 'workflow_dispatch' ||
-      (github.event_name == 'issue_comment' && 
-       github.event.issue.pull_request && 
+      (github.event_name == 'issue_comment' &&
+       github.event.issue.pull_request &&
        contains(github.event.comment.body, '/claude_review'))
 
     runs-on: ubuntu-latest
@@ -21,10 +21,26 @@ jobs:
       id-token: write
 
     steps:
+      - name: Get PR details
+        id: pr-details
+        if: github.event_name == 'issue_comment'
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          PR_NUMBER="${{ github.event.issue.number }}"
+          PR_DATA=$(curl -s -H "Authorization: Bearer $GITHUB_TOKEN" \
+            "https://api.github.com/repos/${{ github.repository }}/pulls/${PR_NUMBER}")
+          PR_HEAD_SHA=$(echo "$PR_DATA" | jq -r '.head.sha')
+          echo "pr_head_sha=$PR_HEAD_SHA" >> $GITHUB_OUTPUT
+          echo "pr_number=$PR_NUMBER" >> $GITHUB_OUTPUT
+
       - name: Checkout repository
         uses: actions/checkout@v4
         with:
-          fetch-depth: 1
+          # For workflow_dispatch, checkout default branch
+          # For issue_comment on PR, checkout the PR head commit
+          ref: ${{ github.event_name == 'issue_comment' && steps.pr-details.outputs.pr_head_sha || github.ref }}
+          fetch-depth: 0
 
       - name: Run Claude Code Review
         id: claude-review

.github/workflows/claude.yml

@@ -9,8 +9,8 @@ jobs:
   claude:
     if: |
       github.event_name == 'workflow_dispatch' ||
-      (github.event_name == 'issue_comment' && 
-       github.event.issue.pull_request && 
+      (github.event_name == 'issue_comment' &&
+       github.event.issue.pull_request &&
        contains(github.event.comment.body, '@claude'))
     runs-on: ubuntu-latest
     permissions:
@@ -20,10 +20,26 @@ jobs:
       id-token: write
       actions: read # Required for Claude to read CI results on PRs
     steps:
+      - name: Get PR details
+        id: pr-details
+        if: github.event_name == 'issue_comment'
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          PR_NUMBER="${{ github.event.issue.number }}"
+          PR_DATA=$(curl -s -H "Authorization: Bearer $GITHUB_TOKEN" \
+            "https://api.github.com/repos/${{ github.repository }}/pulls/${PR_NUMBER}")
+          PR_HEAD_SHA=$(echo "$PR_DATA" | jq -r '.head.sha')
+          echo "pr_head_sha=$PR_HEAD_SHA" >> $GITHUB_OUTPUT
+          echo "pr_number=$PR_NUMBER" >> $GITHUB_OUTPUT
+
       - name: Checkout repository
         uses: actions/checkout@v4
         with:
-          fetch-depth: 1
+          # For workflow_dispatch, checkout default branch
+          # For issue_comment on PR, checkout the PR head commit
+          ref: ${{ github.event_name == 'issue_comment' && steps.pr-details.outputs.pr_head_sha || github.ref }}
+          fetch-depth: 0
 
       - name: Run Claude Code
         id: claude