Function format_output 

pub fn format_output(
    output: ToolOutput,
    format: Option<&str>,
    _tool_name: Option<&str>,
    config: Option<PipelineConfig>,
) -> Result<FormatResult>

Format a ToolOutput to text using the pipeline.

Returns FormatResult with content and metadata (compression stats, token estimates).

Arguments

• output — typed result from executor
• format — output format string (“toon”, “json”), defaults to “toon”
• tool_name — tool name (reserved for future strategy resolution)
• config — optional pipeline config override