- Add new update_claude_comment tool that automatically handles both issue and PR comments
- Remove individual update_issue_comment and update_pull_request_comment tools
- Pass CLAUDE_COMMENT_ID, GITHUB_EVENT_NAME, and IS_PR to MCP server environment
- Simplify Claude's comment update workflow by removing need for owner/repo/commentId params
- Update prompts and tests to use the new unified tool
- Add error field to MCP error responses to fix 'undefined' errors
- Add REPO_DIR environment variable to fix file path resolution
- Use GITHUB_WORKSPACE for correct repository directory
- Simplify path processing logic in commit_files tool
This fixes the issue where mcp__github_file_ops__commit_files would fail
with 'Error calling tool commit_files: undefined' by ensuring error messages
are properly formatted and files are read from the correct directory.