Function handle_diagnose 

pub fn handle_diagnose(
    colors: Colors,
    config: &Config,
    registry: &AgentRegistry,
    config_path: &Path,
    config_sources: &[ConfigSource],
    executor: &dyn ProcessExecutor,
)

Handle –diagnose command.

Outputs comprehensive diagnostic information including:

• System information (OS, architecture, working directory)
• Git status and configuration
• Agent configuration and availability
• PROMPT.md validation
• Checkpoint status
• Project stack detection

This output is designed to be copy-pasted into bug reports.

Arguments

• colors - Color configuration for output formatting
• config - The current Ralph configuration
• registry - The agent registry
• config_path - Path to the unified config file
• config_sources - List of configuration sources that were loaded