Code review installer template regression: plugin approach slower than direct prompt

## Summary

The code review workflow installer template changed between late December 2025 and mid-January 2026. The newer template uses a plugin marketplace approach that is significantly slower and produces lower quality reviews compared to the previous simple prompt approach.

## Evidence

I installed the Claude Code Review workflow in two repositories at different times:

### Older template (Dec 31, 2025) - Fast, high quality
```yaml
- name: Run Claude Code Review
uses: anthropics/claude-code-action@v1
with:
claude_code_oauth_token: ${{ secrets.CLAUDE_CODE_OAUTH_TOKEN }}
prompt: |
REPO: ${{ github.repository }}
PR NUMBER: ${{ github.event.pull_request.number }}

Please review this pull request and provide feedback on:
- Code quality and best practices
- Potential bugs or issues
- Performance considerations
- Security concerns
- Test coverage

Use the repository's CLAUDE.md for guidance on style and conventions.
Be constructive and helpful in your feedback.

Use `gh pr comment` with your Bash tool to leave your review as a comment on the PR.

claude_args: '--allowed-tools "Bash(gh pr comment:*),Bash(gh pr diff:*),Bash(gh pr view:*)"'
```

### Newer template (Jan 13, 2026) - Slow, lower quality
```yaml
- name: Run Claude Code Review
uses: anthropics/claude-code-action@v1
with:
claude_code_oauth_token: ${{ secrets.CLAUDE_CODE_OAUTH_TOKEN }}
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 }}'
claude_args: '--allowedTools "mcp__github_inline_comment__create_inline_comment,Bash(gh pr comment:*),Bash(gh pr diff:*),Bash(gh pr view:*),Bash(gh api:*)"'
```

## Issues with the newer template

1. **Performance**: Reviews take ~10 minutes vs ~4 minutes with the older approach
2. **Plugin overhead**: Loading the plugin marketplace and `code-review@claude-code-plugins` adds startup time
3. **MCP tool latency**: `mcp__github_inline_comment__create_inline_comment` is slower than direct `gh` CLI commands
4. **Vague prompt**: Skill invocation (`/code-review:code-review`) lacks explicit review criteria, leading to less focused output
5. **Typo**: `--allowedTools` (camelCase) should be `--allowed-tools` (kebab-case)
6. **Extra triggers**: 4 PR events vs 2 adds unnecessary runs

## Suggestion

Consider reverting the installer template to the simpler direct prompt approach, or at minimum:
- Fix the `--allowedTools` typo
- Remove the MCP inline comment tool in favor of `gh` CLI
- Add explicit review criteria to the prompt instead of relying on the plugin's defaults

## Environment

- claude-code-action@v1
- Workflows installed via GitHub App installer