add context window monitor

Writes the current context window to logs/current_context_window (uses a symlink to a session ID).

This PR was unfortunately generated by a different LLM and did a ton of superficial reformating, it's actually a fairly small and benign change, but I don't want to roll back everything. Hope that's ok.

crates/g3-planner/src/code_explore.rs

@@ -291,7 +291,10 @@ pub fn explore_kotlin(path: &str) -> String {
 
     // Build files
     report.push_str("--- Build Configuration ---\n");
-    let build = run_command("cat build.gradle.kts 2>/dev/null | head -50 || cat build.gradle 2>/dev/null | head -50", path);
+    let build = run_command(
+        "cat build.gradle.kts 2>/dev/null | head -50 || cat build.gradle 2>/dev/null | head -50",
+        path,
+    );
     report.push_str(&build);
     report.push('\n');
 

crates/g3-planner/src/lib.rs

@@ -9,11 +9,11 @@ pub mod prompts;
 pub use code_explore::explore_codebase;
 
 use anyhow::Result;
-use g3_providers::{CompletionRequest, LLMProvider, Message, MessageRole};
 use chrono::Local;
+use g3_providers::{CompletionRequest, LLMProvider, Message, MessageRole};
+use prompts::{DISCOVERY_REQUIREMENTS_PROMPT, DISCOVERY_SYSTEM_PROMPT};
 use std::fs::{self, OpenOptions};
 use std::io::Write;
-use prompts::{DISCOVERY_REQUIREMENTS_PROMPT, DISCOVERY_SYSTEM_PROMPT};
 
 /// Type alias for a status callback function
 pub type StatusCallback = Box<dyn Fn(&str) + Send + Sync>;
@@ -94,7 +94,10 @@ pub async fn get_initial_discovery_messages(
     // Step 5: Extract shell commands from the response
     let shell_commands = extract_shell_commands(&response.content);
 
-    status(&format!("📋 Extracted {} discovery commands", shell_commands.len()));
+    status(&format!(
+        "📋 Extracted {} discovery commands",
+        shell_commands.len()
+    ));
 
     // Write the discovery commands to logs directory
     write_discovery_commands(&shell_commands)?;

crates/g3-planner/tests/logging_test.rs

@@ -7,38 +7,40 @@ use std::path::Path;
 fn test_log_files_created() {
     // This test verifies that the logging functions work correctly
     // by checking that files can be created in the logs directory
-    
+
     // Clean up any existing test logs
     let _ = fs::remove_dir_all("logs");
-    
+
     // Create logs directory
     fs::create_dir_all("logs").expect("Failed to create logs directory");
-    
+
     // Verify directory exists
     assert!(Path::new("logs").exists());
     assert!(Path::new("logs").is_dir());
-    
+
     // Test writing a code report
     let test_report = "Test codebase report\nLine 2\nLine 3";
     let timestamp = chrono::Local::now().format("%Y%m%d_%H%M%S").to_string();
     let report_filename = format!("logs/code_report_{}.log", timestamp);
-    
+
     fs::write(&report_filename, test_report).expect("Failed to write code report");
     assert!(Path::new(&report_filename).exists());
-    
+
     let content = fs::read_to_string(&report_filename).expect("Failed to read code report");
     assert_eq!(content, test_report);
-    
+
     // Test writing discovery commands
     let commands_filename = format!("logs/discovery_commands_{}.log", timestamp);
-    let test_commands = "# Discovery Commands\n# Generated by g3-planner\n\nls -la\ncat README.md\n";
-    
+    let test_commands =
+        "# Discovery Commands\n# Generated by g3-planner\n\nls -la\ncat README.md\n";
+
     fs::write(&commands_filename, test_commands).expect("Failed to write discovery commands");
     assert!(Path::new(&commands_filename).exists());
-    
-    let content = fs::read_to_string(&commands_filename).expect("Failed to read discovery commands");
+
+    let content =
+        fs::read_to_string(&commands_filename).expect("Failed to read discovery commands");
     assert_eq!(content, test_commands);
-    
+
     // Clean up
     let _ = fs::remove_file(&report_filename);
     let _ = fs::remove_file(&commands_filename);
@@ -48,11 +50,11 @@ fn test_log_files_created() {
 fn test_filename_format() {
     // Verify the filename format matches the tool_calls log format
     let timestamp = chrono::Local::now().format("%Y%m%d_%H%M%S").to_string();
-    
+
     // Check format: YYYYMMDD_HHMMSS
     assert_eq!(timestamp.len(), 15); // 8 digits + underscore + 6 digits
     assert!(timestamp.contains('_'));
-    
+
     let parts: Vec<&str> = timestamp.split('_').collect();
     assert_eq!(parts.len(), 2);
     assert_eq!(parts[0].len(), 8); // YYYYMMDD