Function write_document 

pub fn write_document(
    doc_type: DocumentType,
    filename: &str,
    content: &str,
) -> Result<WriteDocumentOk>

Write a document to the active work directory.

Arguments

• doc_type - The type of document (research, plan, artifact, log)
• filename - The filename (validated for safety)
• content - The content to write

Returns

A WriteDocumentOk with the path and bytes written on success.