feat: handle TaskCreated hook event (closes #254)

src-tauri/src/types.rs

@@ -332,6 +332,18 @@ pub struct FileChangedEvent {
     pub conversation_id: Option<String>,
 }
 
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct TaskCreatedEvent {
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub task_id: Option<String>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub description: Option<String>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub parent_tool_use_id: Option<String>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub conversation_id: Option<String>,
+}
+
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct AgentStartEvent {
     pub tool_use_id: String,
@@ -803,4 +815,49 @@ mod tests {
         assert!(serialized.contains("\"file\":\"/tmp/test.txt\""));
         assert!(!serialized.contains("conversation_id"));
     }
+
+    #[test]
+    fn test_task_created_event_serialization() {
+        let event = TaskCreatedEvent {
+            task_id: Some("task-abc123".to_string()),
+            description: Some("Explore the codebase".to_string()),
+            parent_tool_use_id: Some("toolu_xyz".to_string()),
+            conversation_id: Some("conv-abc".to_string()),
+        };
+
+        let serialized = serde_json::to_string(&event).unwrap();
+        assert!(serialized.contains("\"task_id\":\"task-abc123\""));
+        assert!(serialized.contains("\"description\":\"Explore the codebase\""));
+        assert!(serialized.contains("\"parent_tool_use_id\":\"toolu_xyz\""));
+        assert!(serialized.contains("\"conversation_id\":\"conv-abc\""));
+    }
+
+    #[test]
+    fn test_task_created_event_omits_none_fields() {
+        let event = TaskCreatedEvent {
+            task_id: None,
+            description: None,
+            parent_tool_use_id: None,
+            conversation_id: None,
+        };
+
+        let serialized = serde_json::to_string(&event).unwrap();
+        assert_eq!(serialized, "{}");
+    }
+
+    #[test]
+    fn test_task_created_event_partial_fields() {
+        let event = TaskCreatedEvent {
+            task_id: Some("task-001".to_string()),
+            description: None,
+            parent_tool_use_id: None,
+            conversation_id: None,
+        };
+
+        let serialized = serde_json::to_string(&event).unwrap();
+        assert!(serialized.contains("\"task_id\":\"task-001\""));
+        assert!(!serialized.contains("description"));
+        assert!(!serialized.contains("parent_tool_use_id"));
+        assert!(!serialized.contains("conversation_id"));
+    }
 }

src-tauri/src/wsl_bridge.rs

@@ -17,8 +17,9 @@ use crate::types::{
     AgentEndEvent, AgentStartEvent, CharacterState, ClaudeMessage, ConnectionEvent,
     ConnectionStatus, ContentBlock, CwdChangedEvent, ElicitationEvent, ElicitationResultEvent,
     FileChangedEvent, MessageCost, OutputEvent, PermissionPromptEvent, PermissionPromptEventItem,
-    PostCompactEvent, QuestionOption, SessionEvent, StateChangeEvent, StopFailureEvent, TodoItem,
-    TodoUpdateEvent, UserQuestionEvent, WorkingDirectoryEvent, WorktreeEvent, WorktreeInfo,
+    PostCompactEvent, QuestionOption, SessionEvent, StateChangeEvent, StopFailureEvent,
+    TaskCreatedEvent, TodoItem, TodoUpdateEvent, UserQuestionEvent, WorkingDirectoryEvent,
+    WorktreeEvent, WorktreeInfo,
 };
 use parking_lot::RwLock;
 use std::cell::RefCell;
@@ -1080,6 +1081,7 @@ fn handle_stderr(
                 let is_post_compact = line.contains("[PostCompact Hook]");
                 let is_cwd_changed = line.contains("[CwdChanged Hook]");
                 let is_file_changed = line.contains("[FileChanged Hook]");
+                let is_task_created = line.contains("[TaskCreated Hook]");
 
                 let line_type = if is_worktree_create || is_worktree_remove {
                     "worktree"
@@ -1095,6 +1097,8 @@ fn handle_stderr(
                     "cwd-changed"
                 } else if is_file_changed {
                     "file-changed"
+                } else if is_task_created {
+                    "task-created"
                 } else {
                     "error"
                 };
@@ -1284,6 +1288,34 @@ fn handle_stderr(
                             parent_tool_use_id: None,
                         },
                     );
+                } else if is_task_created {
+                    let data = parse_task_created_hook(&line);
+                    let friendly_content = match data.description.as_deref() {
+                        Some(desc) if !desc.is_empty() => format!("Task created: {}", desc),
+                        _ => "Task created".to_string(),
+                    };
+
+                    let _ = app.emit(
+                        "claude:task-created",
+                        TaskCreatedEvent {
+                            task_id: data.task_id,
+                            description: data.description,
+                            parent_tool_use_id: data.parent_tool_use_id,
+                            conversation_id: conversation_id.clone(),
+                        },
+                    );
+
+                    let _ = app.emit(
+                        "claude:output",
+                        OutputEvent {
+                            line_type: "task-created".to_string(),
+                            content: friendly_content,
+                            tool_name: None,
+                            conversation_id: conversation_id.clone(),
+                            cost: None,
+                            parent_tool_use_id: None,
+                        },
+                    );
                 } else {
                     let _ = app.emit(
                         "claude:output",
@@ -1533,6 +1565,32 @@ fn parse_file_changed_hook(line: &str) -> FileChangedData {
     FileChangedData { file }
 }
 
+#[derive(Debug)]
+struct TaskCreatedData {
+    task_id: Option<String>,
+    description: Option<String>,
+    parent_tool_use_id: Option<String>,
+}
+
+fn parse_task_created_hook(line: &str) -> TaskCreatedData {
+    let task_id = extract_debug_string_value(line, "task_id")
+        .or_else(|| extract_quoted_value(line, "task_id"));
+
+    let description = extract_quoted_value(line, "description")
+        .or_else(|| extract_quoted_value(line, "prompt"));
+
+    let parent_tool_use_id = if line.contains("parent_tool_use_id=Some") {
+        line.split("parent_tool_use_id=Some(\"")
+            .nth(1)
+            .and_then(|s| s.split('"').next())
+            .map(|s| s.to_string())
+    } else {
+        None
+    };
+
+    TaskCreatedData { task_id, description, parent_tool_use_id }
+}
+
 /// Extracts a double-quoted string value from a `key="value"` pair in a hook line.
 /// Handles escape sequences within the quoted value.
 fn extract_quoted_value(line: &str, key: &str) -> Option<String> {
@@ -3737,6 +3795,42 @@ mod tests {
         assert_eq!(data.file, "");
     }
 
+    #[test]
+    fn test_parse_task_created_hook_with_all_fields() {
+        let line = r#"[TaskCreated Hook] task_id=Some("task-abc123"), description="Explore the codebase", parent_tool_use_id=Some("toolu_xyz")"#;
+        let data = parse_task_created_hook(line);
+        assert_eq!(data.task_id, Some("task-abc123".to_string()));
+        assert_eq!(data.description, Some("Explore the codebase".to_string()));
+        assert_eq!(data.parent_tool_use_id, Some("toolu_xyz".to_string()));
+    }
+
+    #[test]
+    fn test_parse_task_created_hook_with_description_only() {
+        let line = r#"[TaskCreated Hook] description="Search for relevant files""#;
+        let data = parse_task_created_hook(line);
+        assert_eq!(data.description, Some("Search for relevant files".to_string()));
+        assert_eq!(data.task_id, None);
+        assert_eq!(data.parent_tool_use_id, None);
+    }
+
+    #[test]
+    fn test_parse_task_created_hook_no_parent() {
+        let line = r#"[TaskCreated Hook] task_id=Some("task-001"), description="Run tests""#;
+        let data = parse_task_created_hook(line);
+        assert_eq!(data.task_id, Some("task-001".to_string()));
+        assert_eq!(data.description, Some("Run tests".to_string()));
+        assert_eq!(data.parent_tool_use_id, None);
+    }
+
+    #[test]
+    fn test_parse_task_created_hook_empty_line() {
+        let line = "[TaskCreated Hook]";
+        let data = parse_task_created_hook(line);
+        assert_eq!(data.task_id, None);
+        assert_eq!(data.description, None);
+        assert_eq!(data.parent_tool_use_id, None);
+    }
+
     #[test]
     fn test_build_stop_failure_message_no_fields() {
         let data = StopFailureData {