Add Claude Code GitHub Workflow (#2645)

## 🤖 Installing Claude Code GitHub App

This PR adds a GitHub Actions workflow that enables Claude Code
integration in our repository.

### What is Claude Code?

[Claude Code](https://claude.ai/code) is an AI coding agent that can
help with:
- Bug fixes and improvements  
- Documentation updates
- Implementing new features
- Code reviews and suggestions
- Writing tests
- And more!

### How it works

Once this PR is merged, we'll be able to interact with Claude by
mentioning @claude in a pull request or issue comment.
Once the workflow is triggered, Claude will analyze the comment and
surrounding context, and execute on the request in a GitHub action.

### Important Notes

- **This workflow won't take effect until this PR is merged**
- **@claude mentions won't work until after the merge is complete**
- The workflow runs automatically whenever Claude is mentioned in PR or
issue comments
- Claude gets access to the entire PR or issue context including files,
diffs, and previous comments

### Security

- Our Anthropic API key is securely stored as a GitHub Actions secret
- Only users with write access to the repository can trigger the
workflow
- All Claude runs are stored in the GitHub Actions run history
- Claude's default tools are limited to reading/writing files and
interacting with our repo by creating comments, branches, and commits.
- We can add more allowed tools by adding them to the workflow file
like:

```
allowed_tools: Bash(npm install),Bash(npm run build),Bash(npm run lint),Bash(npm run test)
```

There's more information in the [Claude Code action
repo](https://github.com/anthropics/claude-code-action).

After merging this PR, let's try mentioning @claude in a comment on any
PR to get started!

Author: tac0turtle

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

@@ -2,7 +2,7 @@ name: Claude Code Review
 
 on:
   pull_request:
-    types: [ready_for_review, synchronize]
+    types: [opened, synchronize]
     # Optional: Only run on specific file changes
     # paths:
     #   - "src/**/*.ts"
@@ -27,51 +27,28 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v4
         with:
           fetch-depth: 1
 
       - name: Run Claude Code Review
         id: claude-review
-        uses: anthropics/claude-code-action@11a01b7183ef5cf1c7fbb75eaf39379c6b11bdc8
+        uses: anthropics/claude-code-action@v1
         with:
           claude_code_oauth_token: ${{ secrets.CLAUDE_CODE_OAUTH_TOKEN }}
-
-          # Optional: Specify model (defaults to Claude Sonnet 4, uncomment for Claude Opus 4)
-          # model: "claude-opus-4-20250514"
-
-          # Direct prompt for automated review (no @claude mention needed)
-          direct_prompt: |
+          prompt: |
             Please review this pull request and provide feedback on:
             - Code quality and best practices
             - Potential bugs or issues
             - Performance considerations
             - Security concerns
             - Test coverage
 
-            Be constructive and helpful in your feedback.
-
-          # Optional: Use sticky comments to make Claude reuse the same comment on subsequent pushes to the same PR
-          use_sticky_comment: true
+            Use the repository's CLAUDE.md for guidance on style and conventions. Be constructive and helpful in your feedback.
 
-          # Optional: Customize review based on file types
-          # direct_prompt: |
-          #   Review this PR focusing on:
-          #   - For TypeScript files: Type safety and proper interface usage
-          #   - For API endpoints: Security, input validation, and error handling
-          #   - For React components: Performance, accessibility, and best practices
-          #   - For tests: Coverage, edge cases, and test quality
+            Use `gh pr comment` with your Bash tool to leave your review as a comment on the PR.
 
-          # Optional: Different prompts for different authors
-          # direct_prompt: |
-          #   ${{ github.event.pull_request.author_association == 'FIRST_TIME_CONTRIBUTOR' &&
-          #   'Welcome! Please review this PR from a first-time contributor. Be encouraging and provide detailed explanations for any suggestions.' ||
-          #   'Please provide a thorough code review focusing on our coding standards and best practices.' }}
-
-          # Optional: Add specific tools for running tests or linting
-          # allowed_tools: "Bash(npm run test),Bash(npm run lint),Bash(npm run typecheck)"
-
-          # Optional: Skip review for certain conditions
-          # if: |
-          #   !contains(github.event.pull_request.title, '[skip-review]') &&
-          #   !contains(github.event.pull_request.title, '[WIP]')
+          # See https://github.com/anthropics/claude-code-action/blob/main/docs/usage.md
+          # or https://docs.anthropic.com/en/docs/claude-code/sdk#command-line for available options
+          claude_args: '--allowed-tools "Bash(gh issue view:*),Bash(gh search:*),Bash(gh issue list:*),Bash(gh pr comment:*),Bash(gh pr diff:*),Bash(gh pr view:*),Bash(gh pr list:*)"'
+          use_sticky_comment: true

.github/workflows/claude.yml

@@ -26,38 +26,25 @@ jobs:
       actions: read # Required for Claude to read CI results on PRs
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v4
         with:
           fetch-depth: 1
 
       - name: Run Claude Code
         id: claude
-        uses: anthropics/claude-code-action@11a01b7183ef5cf1c7fbb75eaf39379c6b11bdc8
+        uses: anthropics/claude-code-action@v1
         with:
           claude_code_oauth_token: ${{ secrets.CLAUDE_CODE_OAUTH_TOKEN }}
-
+          
           # This is an optional setting that allows Claude to read CI results on PRs
           additional_permissions: |
             actions: read
 
-          # Optional: Specify model (defaults to Claude Sonnet 4, uncomment for Claude Opus 4)
-          # model: "claude-opus-4-20250514"
-
-          # Optional: Customize the trigger phrase (default: @claude)
-          # trigger_phrase: "/claude"
-
-          # Optional: Trigger when specific user is assigned to an issue
-          # assignee_trigger: "claude-bot"
-
-          # Optional: Allow Claude to run specific commands
-          # allowed_tools: "Bash(npm install),Bash(npm run build),Bash(npm run test:*),Bash(npm run lint:*)"
+          # Optional: Give a custom prompt to Claude. If this is not specified, Claude will perform the instructions specified in the comment that tagged it.
+          # prompt: 'Update the pull request description to include a summary of changes.'
 
-          # Optional: Add custom instructions for Claude to customize its behavior for your project
-          # custom_instructions: |
-          #   Follow our coding standards
-          #   Ensure all new code has tests
-          #   Use TypeScript for new files
+          # Optional: Add claude_args to customize behavior and configuration
+          # See https://github.com/anthropics/claude-code-action/blob/main/docs/usage.md
+          # or https://docs.anthropic.com/en/docs/claude-code/sdk#command-line for available options
+          # claude_args: '--model claude-opus-4-1-20250805 --allowed-tools Bash(gh pr:*)'
 
-          # Optional: Custom environment variables for Claude
-          # claude_env: |
-          #   NODE_ENV: test