fix: grant write permissions to Claude Code workflows

- claude-code-review.yml: pull-requests/issues read → write (post reviews)
- claude.yml: contents/pull-requests/issues read → write (respond to @claude)
- Upgrade checkout@v4 → v6, fetch-depth: 1 → 0 for full diff context
- Skip draft PRs in review workflow
- Remove boilerplate comments

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

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

@@ -3,33 +3,22 @@ name: Claude Code Review
 on:
   pull_request:
     types: [opened, synchronize, ready_for_review, reopened]
-    # Optional: Only run on specific file changes
-    # paths:
-    #   - "src/**/*.ts"
-    #   - "src/**/*.tsx"
-    #   - "src/**/*.js"
-    #   - "src/**/*.jsx"
 
 jobs:
   claude-review:
-    # Optional: Filter by PR author
-    # if: |
-    #   github.event.pull_request.user.login == 'external-contributor' ||
-    #   github.event.pull_request.user.login == 'new-developer' ||
-    #   github.event.pull_request.author_association == 'FIRST_TIME_CONTRIBUTOR'
-
+    if: ${{ !github.event.pull_request.draft }}
     runs-on: ubuntu-latest
     permissions:
       contents: read
-      pull-requests: read
-      issues: read
+      pull-requests: write
+      issues: write
       id-token: write
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
-          fetch-depth: 1
+          fetch-depth: 0
 
       - name: Run Claude Code Review
         id: claude-review
@@ -39,6 +28,3 @@ jobs:
           plugin_marketplaces: 'https://github.com/anthropics/claude-code.git'
           plugins: 'code-review@claude-code-plugins'
           prompt: '/code-review:code-review ${{ github.repository }}/pull/${{ github.event.pull_request.number }}'
-          # See https://github.com/anthropics/claude-code-action/blob/main/docs/usage.md
-          # or https://code.claude.com/docs/en/cli-reference for available options
-