Get a summary of a specific file, including:
- Line count
- Function/class definitions (for supported languages)
- Import statements
- Basic complexity metrics

Get the source code body of a specific symbol (function, method, or class).

This tool retrieves only the code for the specified symbol, enabling efficient
context usage by avoiding loading entire files.

Args:
    file_path: Path to the file containing the symbol
    symbol_name: Name of the symbol to retrieve (e.g., "process_data", "MyClass.my_method")

Returns:
    Dictionary containing:
    - status: "success" or "error"
    - symbol_name: Name of the symbol
    - type: Type of symbol (function, method, class)
    - line: Start line number
    - end_line: End line number
    - code: The actual source code
    - signature: Function/method signature (if available)
    - docstring: Documentation string (if available)
    - called_by: List of symbols that call this symbol

Build the deep index (full symbol extraction) for the current project.

This performs a complete re-index and loads it into memory.
Uses parallel processing by default. For large codebases (3000+ files),
tuning max_workers can significantly improve build times.

Args:
    max_workers: Maximum number of parallel workers for file processing.
        Defaults to min(4, cpu_count) when not specified.
        Increase for I/O-bound workloads on machines with many cores.
    timeout: Parallel build timeout in seconds. When not specified,
        scales dynamically based on file count (0.5s per file,
        min 30s, max 600s).

Args:
    enabled: Whether to enable file watcher
    debounce_seconds: Debounce time in seconds before triggering rebuild
    additional_exclude_patterns: Additional directory/file patterns to exclude
    observer_type: Observer backend to use. Options:
        - "auto" (default): platform default observer
        - "kqueue": Force kqueue observer (macOS/BSD)
        - "fsevents": Force FSEvents observer (macOS only, has known reliability issues)
        - "polling": Cross-platform polling fallback (slower but most compatible)