--machine mode flag for verbose CLI output

crates/g3-cli/src/machine_ui_writer.rs

@@ -0,0 +1,93 @@
+use g3_core::ui_writer::UiWriter;
+use std::io::{self, Write};
+
+/// Machine-mode implementation of UiWriter that prints plain, unformatted output
+/// This is designed for programmatic consumption and outputs everything verbatim
+pub struct MachineUiWriter;
+
+impl MachineUiWriter {
+    pub fn new() -> Self {
+        Self
+    }
+}
+
+impl UiWriter for MachineUiWriter {
+    fn print(&self, message: &str) {
+        print!("{}", message);
+    }
+
+    fn println(&self, message: &str) {
+        println!("{}", message);
+    }
+
+    fn print_inline(&self, message: &str) {
+        print!("{}", message);
+        let _ = io::stdout().flush();
+    }
+
+    fn print_system_prompt(&self, prompt: &str) {
+        println!("SYSTEM_PROMPT:");
+        println!("{}", prompt);
+        println!("END_SYSTEM_PROMPT");
+        println!();
+    }
+
+    fn print_context_status(&self, message: &str) {
+        println!("CONTEXT_STATUS: {}", message);
+    }
+
+    fn print_context_thinning(&self, message: &str) {
+        println!("CONTEXT_THINNING: {}", message);
+    }
+
+    fn print_tool_header(&self, tool_name: &str) {
+        println!("TOOL_CALL: {}", tool_name);
+    }
+
+    fn print_tool_arg(&self, key: &str, value: &str) {
+        println!("TOOL_ARG: {} = {}", key, value);
+    }
+
+    fn print_tool_output_header(&self) {
+        println!("TOOL_OUTPUT:");
+    }
+
+    fn update_tool_output_line(&self, line: &str) {
+        println!("{}", line);
+    }
+
+    fn print_tool_output_line(&self, line: &str) {
+        println!("{}", line);
+    }
+
+    fn print_tool_output_summary(&self, count: usize) {
+        println!("TOOL_OUTPUT_LINES: {}", count);
+    }
+
+    fn print_tool_timing(&self, duration_str: &str) {
+        println!("TOOL_DURATION: {}", duration_str);
+        println!("END_TOOL_OUTPUT");
+        println!();
+    }
+
+    fn print_agent_prompt(&self) {
+        let _ = io::stdout().flush();
+    }
+
+    fn print_agent_response(&self, content: &str) {
+        print!("{}", content);
+        let _ = io::stdout().flush();
+    }
+
+    fn notify_sse_received(&self) {
+        // No-op for machine mode
+    }
+
+    fn flush(&self) {
+        let _ = io::stdout().flush();
+    }
+    
+    fn wants_full_output(&self) -> bool {
+        true  // Machine mode wants complete, untruncated output
+    }
+}