Add Claude Code GitHub Workflow

[justin808]

🤖 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 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.

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

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✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch add-claude-github-actions-1770797587019

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[greptile-apps]

Greptile Overview

Greptile Summary

Reverted from centralized reusable workflow back to inline implementation for Claude Code Review, and updated documentation URLs in Claude Code workflow.

Key changes:

• claude-code-review.yml: Changed from calling shakacode/.github reusable workflow to inline implementation using code-review@claude-code-plugins
• claude-code-review.yml: Permissions changed from write to read for pull-requests and issues (verify the code-review plugin can post comments with read-only permissions)
• claude-code-review.yml: Added triggers for ready_for_review and reopened PR events
• claude.yml: Updated documentation URL from docs.claude.com to code.claude.com/docs/en/cli-reference
• claude.yml: Removed obsolete --model parameter from example comment

Observations:

• This appears to reverse the centralization done in PR Use centralized Claude Code Review workflow #883, moving back to repository-specific workflow definitions
• The permission downgrade from write to read is notable - the previous fix in PR Fix Claude Code Review workflow permissions #886 specifically added write permissions because the reusable workflow required them
• Both files correctly end with trailing newlines per project style guide

Confidence Score: 4/5

• This PR is safe to merge with one verification needed
• The changes are straightforward workflow configuration updates with proper formatting. However, the permission downgrade from write to read for the code-review workflow needs verification to ensure the plugin can still post review comments successfully.
• Verify .github/workflows/claude-code-review.yml works with read-only permissions after merging

Important Files Changed

Filename	Overview
.github/workflows/claude.yml	Updated documentation URL in comments and removed obsolete model parameter reference
.github/workflows/claude-code-review.yml	Changed from centralized reusable workflow to inline implementation with reduced permissions (read-only instead of write)

Sequence Diagram

sequenceDiagram
    participant User
    participant GitHub
    participant ClaudeWorkflow as Claude Code Workflow
    participant ClaudeReview as Claude Code Review
    participant Anthropic as Claude API

    Note over User,Anthropic: Interactive @claude mentions flow
    User->>GitHub: Creates comment with @claude mention
    GitHub->>ClaudeWorkflow: Triggers on issue_comment/PR comment
    ClaudeWorkflow->>Anthropic: Sends context + user request
    Anthropic->>ClaudeWorkflow: Returns response
    ClaudeWorkflow->>GitHub: Posts comment/commits changes

    Note over User,Anthropic: Automatic PR review flow
    User->>GitHub: Opens/updates pull request
    GitHub->>ClaudeReview: Triggers on PR events
    ClaudeReview->>Anthropic: Invokes code-review plugin
    Anthropic->>ClaudeReview: Returns review analysis
    ClaudeReview->>GitHub: Posts review comments (needs write perms?)

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