# TASK_17: km_notifications - User Feedback System
**Created By**: Agent_ADDER+ (High-Impact Tool Implementation) | **Priority**: MEDIUM | **Duration**: 2 hours
**Technique Focus**: User Interface + Async Messaging + State Management + Platform Integration
**Size Constraint**: Target <250 lines/module, Max 400 if splitting awkward
## 🚦 Status & Assignment
**Status**: COMPLETED
**Assigned**: Agent_10
**Dependencies**: TASK_10 (macro creation for notification macros)
**Blocking**: None (standalone notification functionality)
## 📖 Required Reading (Complete before starting)
- [x] **development/protocols/KM_MCP.md**: km_notifications specification (lines 1107-1121)
- [x] **src/creation/**: Macro creation patterns from TASK_10
- [x] **macOS Notification System**: Understanding Notification Center, alerts, HUD displays
- [x] **src/core/types.py**: State management and event types
- [x] **tests/TESTING.md**: User interface and notification testing
## 🎯 Implementation Overview
Create a comprehensive notification system that enables AI assistants to provide user feedback through various notification types including system notifications, alerts, HUD displays, and sound notifications with proper timing and user experience considerations.
<thinking>
Notifications are crucial for user experience:
1. Multiple Channels: System notifications, alerts, HUD displays, sound alerts
2. User Experience: Non-intrusive design, proper timing, dismissal handling
3. Content Safety: Validate notification content for length and appropriateness
4. State Management: Track notification states and user interactions
5. Platform Integration: Work with macOS notification system and KM capabilities
</thinking>
## ✅ Implementation Subtasks (Sequential completion)
### Phase 1: Core Notification Infrastructure
- [x] **Notification types**: Define NotificationType, NotificationSpec, DisplayDuration types
- [x] **Content validation**: Message length limits, content sanitization, safety checks
- [x] **State tracking**: Monitor notification display states and user interactions
- [x] **Platform integration**: Interface with macOS Notification Center and KM displays
### Phase 2: Notification Channels & Implementation
- [x] **System notifications**: macOS Notification Center integration with sound and actions
- [x] **Alert dialogs**: Modal alerts with user confirmation and button options
- [x] **HUD displays**: On-screen heads-up displays with customizable positioning
- [x] **Sound notifications**: Audio alerts with system sounds and custom audio files
### Phase 3: Advanced Features & User Experience
- [x] **Timing control**: Display duration, auto-dismissal, persistent notifications
- [x] **User interaction**: Handle user responses, button clicks, dismissal events
- [x] **Notification queuing**: Manage multiple notifications with priority ordering
- [x] **Content formatting**: Rich text, icons, progress indicators
### Phase 4: MCP Tool Integration
- [x] **Tool implementation**: km_notifications MCP tool with notification types
- [x] **Type support**: notification, alert, hud, sound with customization options
- [x] **Response formatting**: Notification display results with interaction tracking
- [x] **Testing integration**: User interface tests and notification validation
## 🔧 Implementation Files & Specifications
### New Files to Create:
#### src/notifications/notification_manager.py - Core Notification System
```python
from dataclasses import dataclass, field
from typing import Optional, List, Dict, Any, Union
from enum import Enum
import asyncio
class NotificationType(Enum):
"""Supported notification types."""
NOTIFICATION = "notification" # System notification center
ALERT = "alert" # Modal dialog
HUD = "hud" # Heads-up display
SOUND = "sound" # Audio notification
@dataclass(frozen=True)
class NotificationSpec:
"""Type-safe notification specification."""
notification_type: NotificationType
title: str
message: str
duration: Optional[float] = None
sound: Optional[str] = None
icon: Optional[str] = None
buttons: List[str] = field(default_factory=list)
@require(lambda self: len(self.title) > 0 and len(self.title) <= 100)
@require(lambda self: len(self.message) > 0 and len(self.message) <= 500)
def __post_init__(self):
pass
def is_dismissible(self) -> bool:
"""Check if notification can be dismissed by user."""
return self.notification_type in [NotificationType.NOTIFICATION, NotificationType.HUD]
class NotificationManager:
"""Manage user notifications with multiple display channels."""
@require(lambda spec: spec.title and spec.message)
@ensure(lambda result: result.is_right() or result.get_left().code in ["DISPLAY_ERROR", "PERMISSION_ERROR"])
async def display_notification(self, spec: NotificationSpec) -> Either[KMError, str]:
"""Display notification with comprehensive validation."""
pass
async def display_system_notification(
self,
title: str,
message: str,
sound: Optional[str] = None
) -> Either[KMError, str]:
"""Display macOS system notification."""
pass
async def display_alert_dialog(
self,
title: str,
message: str,
buttons: List[str] = None
) -> Either[KMError, str]:
"""Display modal alert dialog with user interaction."""
pass
async def display_hud(
self,
message: str,
duration: float = 3.0,
position: str = "center"
) -> Either[KMError, str]:
"""Display heads-up display overlay."""
pass
def validate_notification_content(self, content: str) -> bool:
"""Validate notification content for safety and appropriateness."""
pass
```
#### src/server/tools/notification_tools.py - MCP Tool Implementation
```python
async def km_notifications(
notification_type: Annotated[str, Field(
description="Notification type",
pattern=r"^(notification|alert|hud|sound)$"
)],
title: Annotated[str, Field(
description="Notification title",
min_length=1,
max_length=100
)],
message: Annotated[str, Field(
description="Notification message content",
min_length=1,
max_length=500
)],
sound: Annotated[Optional[str], Field(
default=None,
description="Sound name or file path",
max_length=255
)] = None,
duration: Annotated[Optional[float], Field(
default=None,
description="Display duration in seconds",
ge=0.1,
le=60.0
)] = None,
buttons: Annotated[List[str], Field(
default_factory=list,
description="Button labels for alert dialogs",
max_items=3
)] = [],
position: Annotated[str, Field(
default="center",
description="HUD position on screen",
pattern=r"^(center|top|bottom|left|right)$"
)] = "center",
ctx: Context = None
) -> Dict[str, Any]:
"""
Display user notifications with comprehensive formatting and interaction support.
Notification Types:
- notification: System notification center with optional sound
- alert: Modal dialog with user interaction buttons
- hud: On-screen heads-up display with positioning
- sound: Audio notification with system or custom sounds
Features:
- Content validation and length limits
- User interaction tracking for alerts
- Customizable timing and positioning
- Sound integration with system sounds
- Rich formatting and icon support
Returns notification display results with user interaction data.
"""
# Implementation details...
pass
```
## ✅ Success Criteria
- [x] Complete notification system with all four notification types
- [x] Support for system notifications, alerts, HUD displays, and sound notifications
- [x] Real macOS notification integration with user interaction tracking
- [x] Comprehensive error handling with permission and display validation
- [x] Property-based testing for notification content and timing scenarios
- [x] Performance meets sub-2-second display targets for all notification types
- [x] Integration with macro creation for notification-based workflows
- [x] TESTING.md updated with user interface and notification tests
- [x] Documentation with notification best practices and user experience guidelines
## 🎨 Usage Examples
### Basic Notifications
```python
# System notification
result = await client.call_tool("km_notifications", {
"notification_type": "notification",
"title": "Task Complete",
"message": "Your automation has finished successfully",
"sound": "default"
})
# Alert dialog with user interaction
result = await client.call_tool("km_notifications", {
"notification_type": "alert",
"title": "Confirm Action",
"message": "Do you want to proceed with the file operation?",
"buttons": ["Yes", "No", "Cancel"]
})
```
### Advanced Notifications
```python
# HUD display with positioning
result = await client.call_tool("km_notifications", {
"notification_type": "hud",
"title": "Processing",
"message": "Converting files... 75% complete",
"duration": 5.0,
"position": "top"
})
# Sound notification
result = await client.call_tool("km_notifications", {
"notification_type": "sound",
"title": "Alert",
"message": "System backup completed",
"sound": "/System/Library/Sounds/Glass.aiff"
})
```
