Add Claude Code GitHub Workflow

[spaceBrownie]

🤖 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!

[unblocked]

2 issues found.

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[unblocked]

All permissions are set to read, but Claude needs write access to post comments, create branches, and push commits. The claude-code-action maintainers themselves fixed this exact issue in their own repo (anthropics/claude-code-action#950), changing from read to write so that the OIDC app token can operate.

With read permissions, the action will fail when Claude tries to respond to @claude mentions.

    permissions:
      contents: write
      pull-requests: write
      issues: write
      id-token: write

[unblocked]

Same issue as in claude.yml: permissions are read but the action needs write to post review comments on PRs. At minimum, pull-requests: write is required for the review workflow to function.

    permissions:
      contents: read
      pull-requests: write
      issues: read
      id-token: write