Add Claude Code GitHub Workflow

[twistedmelonman]

🤖 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!

[sentry]

Bug: The new GitHub workflows claude.yml and claude-code-review.yml lack the necessary write permissions to post comments on pull requests and issues, which will cause them to fail.
_{Severity: HIGH}

Suggested Fix

Add pull-requests: write and issues: write to the permissions block in both claude.yml and claude-code-review.yml to allow the actions to post comments as intended.

Prompt for AI Agent

Review the code at the location below. A potential bug has been identified by an AI
agent.
Verify if this is a real issue. If it is, propose a fix; if not, explain why it's not
valid.

Location: .github/workflows/claude-code-review.yml#L22-L26

Potential issue: The new GitHub workflows, `claude.yml` and `claude-code-review.yml`,
are configured with read-only permissions for `pull-requests` and `issues`. However,
their intended function is to post review comments, which requires `pull-requests:
write` and `issues: write` permissions. This is confirmed by an existing, similar
workflow (`claude-blocking-review.yml`) that already uses these write permissions.
Without the correct permissions, these new workflows will fail with a permission denied
error every time they attempt to post a comment, preventing them from performing their
core function.

_{Did we get this right? 👍 / 👎 to inform future reviews.}