feat: add compact styled output for TODO tools

TODO tools (todo_read, todo_write) now display with a cleaner, more
compact format:

- Styled header: " ● todo_read" or " ● todo_write"
- Tree-style prefixes for content lines (│ and └)
- Checkbox conversion: "- [ ]" → □, "- [x]" → ■
- Dimmed content for visual distinction
- No timing footer (cleaner output)

Changes:
- Add print_todo_compact() method to UiWriter trait
- Implement print_todo_compact() in ConsoleUiWriter
- Update todo.rs to call print_todo_compact() instead of line-by-line output
- Skip tool header, output header, and timing for TODO tools in agent streaming

crates/g3-cli/src/ui_writer_impl.rs

@@ -437,6 +437,57 @@ impl UiWriter for ConsoleUiWriter {
         true
     }
 
+    fn print_todo_compact(&self, content: Option<&str>, is_write: bool) -> bool {
+        let tool_name = if is_write { "todo_write" } else { "todo_read" };
+        let is_agent_mode = *self.is_agent_mode.lock().unwrap();
+        let tool_color = if is_agent_mode { "\x1b[38;5;250m" } else { "\x1b[32m" };
+
+        // Add blank line if last output was text (for visual separation)
+        let mut last_was_text = self.last_output_was_text.lock().unwrap();
+        if *last_was_text {
+            println!();
+        }
+        *last_was_text = false;
+        *self.last_output_was_tool.lock().unwrap() = true;
+        // Reset read_file continuation tracking
+        *self.last_read_file_path.lock().unwrap() = None;
+
+        match content {
+            None => {
+                // Empty TODO
+                println!(" \x1b[2m●\x1b[0m {}{}\x1b[0m \x1b[2m|\x1b[0m \x1b[35mempty\x1b[0m", tool_color, tool_name);
+            }
+            Some(text) => {
+                // Header
+                println!(" \x1b[2m●\x1b[0m {}{}\x1b[0m", tool_color, tool_name);
+                
+                let lines: Vec<&str> = text.lines().collect();
+                let last_idx = lines.len().saturating_sub(1);
+                
+                for (i, line) in lines.iter().enumerate() {
+                    let is_last = i == last_idx;
+                    let prefix = if is_last { "└" } else { "│" };
+                    
+                    // Convert checkboxes to styled symbols
+                    let styled_line = line
+                        .replace("- [x]", "■")
+                        .replace("- [X]", "■")
+                        .replace("- [ ]", "□");
+                    
+                    // Dim the line content
+                    println!("   \x1b[2m{}  {}\x1b[0m", prefix, styled_line);
+                }
+                // Add blank line after content for readability
+                println!();
+            }
+        }
+
+        // Clear tool state
+        self.clear_tool_state();
+        
+        true
+    }
+
     fn print_tool_timing(&self, duration_str: &str, tokens_delta: u32, context_percentage: f32) {
         let color_code = duration_color(duration_str);
 

crates/g3-core/src/lib.rs

@@ -88,7 +88,7 @@ pub enum StreamState {
 
 
 // Re-export StreamingToolParser from its own module
-pub use streaming_parser::StreamingToolParser;
+pub use streaming_parser::{StreamingToolParser, sanitize_inline_tool_patterns, LBRACE_HOMOGLYPH};
 
 pub struct Agent<W: UiWriter> {
     providers: ProviderRegistry,
@@ -2131,7 +2131,11 @@ impl<W: UiWriter> Agent<W> {
                             // Finish streaming markdown before showing tool output
                             self.ui_writer.finish_streaming_markdown();
 
-                            // Tool call header
+                            // Check if this is a TODO tool (they handle their own output)
+                            let is_todo_tool = tool_call.tool == "todo_read" || tool_call.tool == "todo_write";
+
+                            // Tool call header (skip for TODO tools - they print their own compact header)
+                            if !is_todo_tool {
                             self.ui_writer.print_tool_header(&tool_call.tool, Some(&tool_call.args));
                             if let Some(args_obj) = tool_call.args.as_object() {
                                 for (key, value) in args_obj {
@@ -2143,12 +2147,13 @@ impl<W: UiWriter> Agent<W> {
                                     self.ui_writer.print_tool_arg(key, &value_str);
                                 }
                             }
+                            }
 
                             // Check if this is a compact tool (file operations)
                             let is_compact_tool = matches!(tool_call.tool.as_str(), "read_file" | "write_file" | "str_replace" | "remember" | "take_screenshot" | "code_coverage" | "rehydrate");
                             
                             // Only print output header for non-compact tools
-                            if !is_compact_tool {
+                            if !is_compact_tool && !is_todo_tool {
                                 self.ui_writer.print_tool_output_header();
                             }
 
@@ -2316,6 +2321,8 @@ impl<W: UiWriter> Agent<W> {
                             // Closure marker with timing
                             let tokens_delta = self.context_window.used_tokens.saturating_sub(tokens_before);
                             
+                            // TODO tools handle their own output via print_todo_compact, skip timing
+                            if !is_todo_tool {
                                 // Use compact format for file operations, normal format for others
                                 if let Some(summary) = compact_summary {
                                     self.ui_writer.print_tool_compact(
@@ -2331,6 +2338,7 @@ impl<W: UiWriter> Agent<W> {
                                             tokens_delta,
                                             self.context_window.percentage_used());
                                 }
+                            }
                             self.ui_writer.print_agent_prompt();
 
                             // Update the request with the new context for next iteration

crates/g3-core/src/tools/todo.rs

@@ -23,6 +23,7 @@ pub async fn execute_todo_read<W: UiWriter>(
         // Also update in-memory content to stay in sync
         let mut todo = ctx.todo_content.write().await;
         *todo = String::new();
+        ctx.ui_writer.print_todo_compact(None, false);
         return Ok("📝 TODO list is empty (no todo.g3.md file found)".to_string());
     }
 
@@ -42,11 +43,10 @@ pub async fn execute_todo_read<W: UiWriter>(
             }
 
             if content.trim().is_empty() {
+                ctx.ui_writer.print_todo_compact(None, false);
                 Ok("📝 TODO list is empty".to_string())
             } else {
-                for line in content.lines() {
+                ctx.ui_writer.print_todo_compact(Some(&content), false);
-                    ctx.ui_writer.print_tool_output_line(line);
-                }
                 Ok(format!("📝 TODO list:\n{}", content))
             }
         }
@@ -98,14 +98,10 @@ pub async fn execute_todo_write<W: UiWriter>(
             Ok(_) => {
                 let mut todo = ctx.todo_content.write().await;
                 *todo = String::new();
-                // Show the final completed TODOs before deletion
+                // Show the final completed TODOs
-                let mut result =
+                ctx.ui_writer.print_todo_compact(Some(content_str), true);
-                    String::from("✅ All TODOs completed! Removed todo.g3.md\n\nFinal status:\n");
+                let mut result = String::from("✅ All TODOs completed! Removed todo.g3.md\n\nFinal status:\n");
-                for line in content_str.lines() {
+                result.push_str(content_str);
-                    ctx.ui_writer.print_tool_output_line(line);
-                    result.push_str(line);
-                    result.push('\n');
-                }
                 return Ok(result);
             }
             Err(e) => return Ok(format!("❌ Failed to remove todo.g3.md: {}", e)),
@@ -117,10 +113,7 @@ pub async fn execute_todo_write<W: UiWriter>(
             // Also update in-memory content to stay in sync
             let mut todo = ctx.todo_content.write().await;
             *todo = content_str.to_string();
-            // Print the TODO content to the console (inside the tool frame)
+            ctx.ui_writer.print_todo_compact(Some(content_str), true);
-            for line in content_str.lines() {
-                ctx.ui_writer.print_tool_output_line(line);
-            }
             Ok(format!(
                 "✅ TODO list updated ({} chars) and saved to todo.g3.md:\n{}",
                 char_count, content_str

crates/g3-core/src/ui_writer.rs

@@ -46,6 +46,15 @@ pub trait UiWriter: Send + Sync {
         false
     }
 
+    /// Print a compact TODO tool output with styled content
+    /// Format: " ● todo_read" header, then styled content lines, no timing
+    /// content: None for empty, Some(content) for TODO content
+    /// is_write: true for todo_write, false for todo_read
+    /// Returns true if handled, false to fall back to normal format
+    fn print_todo_compact(&self, _content: Option<&str>, _is_write: bool) -> bool {
+        false
+    }
+
     /// Print tool execution timing
     fn print_tool_timing(&self, duration_str: &str, tokens_delta: u32, context_percentage: f32);