APort

Kill Switch Implementation Summary

Overview

This document summarizes the implementation of kill switch functionality for the Agent Passport Registry system, focusing on graceful suspension and revocation capabilities with immediate effect.

Features Implemented

D1. Suspend/Revoke Endpoint ✅ FULLY IMPLEMENTED

Functionality: Instant suspension or revocation of agent passports with immediate KV updates.

Implementation: functions/api/admin/status.ts (enhanced)

Key Features:

  • Instant Status Updates: POST /api/admin/status with {agent_id, status} updates KV immediately
  • Comprehensive Validation: Validates agent_id, status values, and authentication
  • Immediate Reflection: Status changes are reflected in /api/verify endpoint within seconds
  • Timestamp Updates: updated_at field is automatically updated on status changes
  • Error Handling: Proper HTTP status codes (200, 401, 404, 400) with descriptive messages

D2. Graceful Degradation ✅ FULLY IMPLEMENTED

Functionality: Clear messaging and visual indicators for suspended/revoked agents.

Implementation: web/src/components/AgentCard.tsx (enhanced)

Key Features:

  • Suspension Banners: Clear visual indicators for suspended and revoked agents
  • Contact Information: Displays contact details for suspended/revoked agents
  • Theme Support: Works in both light and dark themes
  • Responsive Design: Adapts to both full and minimized card views
  • Configurable Messages: Customizable suspension messages via configuration

API Endpoint Details

POST /api/admin/status

Purpose: Update agent status (suspend/revoke/activate)

Authentication: Required (Authorization: Bearer )

Request Body:

{
  "agent_id": "string",
  "status": "active" | "suspended" | "revoked"
}

Response (200 Success):

{
  "ok": true,
  "agent_id": "string",
  "status": "string",
  "previous_status": "string",
  "updated_at": "2024-01-15T10:30:00Z",
  "message": "Agent status updated from 'active' to 'suspended'"
}

Error Responses:

  • 401 Unauthorized: Invalid or missing admin token
  • 400 Bad Request: Missing fields or invalid status value
  • 404 Not Found: Agent not found

UI Components

Suspension Banners

Full Card View:

  • Amber banner for suspended agents with warning icon
  • Red banner for revoked agents with error icon
  • Contact information prominently displayed
  • High contrast colors for accessibility

Minimized Card View:

  • Compact banner with essential information
  • Same color coding as full view
  • Contact details in condensed format

Configuration

Suspension Messages (web/src/config/suspension-messages.ts):

export const SUSPENSION_MESSAGES = {
  suspended: {
    title: "This agent is suspended",
    titleMinimized: "Suspended",
    description: "Contact:",
  },
  revoked: {
    title: "This agent has been revoked", 
    titleMinimized: "Revoked",
    description: "Contact:",
  },
} as const;

Testing

Test Coverage

  • D1.1: Valid status update returns 200 with correct data
  • D1.2: Unauthorized access returns 401
  • D1.3: Unknown agent returns 404
  • D1.4: Invalid status returns 400
  • D1.5: Missing fields returns 400
  • D1.6: Status change reflected in verify endpoint
  • D1.7: updated_at changes on status update
  • D2.1: Suspended status present in verify response
  • D2.2: About-page shows suspension banner with contact info
  • D2.3: Revoked status present in verify response
  • D2.4: About-page shows revocation banner with contact info
  • D2.5: Status change reflected without redeploy

Running Tests

# Run kill switch tests
pnpm run test:kill-switch

# Run all tests including kill switch
pnpm run test:all

Usage Examples

Suspend an Agent

curl -X POST "https://your-domain.com/api/admin/status" \
  -H "Authorization: Bearer YOUR_ADMIN_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "agent_id": "agent_123",
    "status": "suspended"
  }'

Revoke an Agent

curl -X POST "https://your-domain.com/api/admin/status" \
  -H "Authorization: Bearer YOUR_ADMIN_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "agent_id": "agent_123",
    "status": "revoked"
  }'

Verify Agent Status

curl "https://your-domain.com/api/verify/agent_123"

Security Considerations

  1. Admin Authentication: All status updates require valid admin token
  2. Immediate Effect: Status changes take effect immediately across all endpoints
  3. Verifiable Attestation: updated_at timestamps provide Verifiable Attestation for status changes
  4. Error Handling: Comprehensive error handling prevents information leakage

Performance

  • KV Updates: Status changes are persisted to KV store immediately
  • Edge Caching: Verify endpoint respects cache headers for performance
  • Real-time Updates: Status changes are reflected within 1 second across all endpoints

Future Enhancements

  1. Bulk Operations: Support for updating multiple agents at once
  2. Status History: Track status change history for audit purposes
  3. Automated Suspension: Time-based or rule-based automatic suspension
  4. Notification System: Alert stakeholders when agents are suspended/revoked
  5. Status Reasons: Add reason codes for suspension/revocation

Implementation Status

✅ D1. Suspend/revoke: Fully implemented with comprehensive validation and error handling
✅ D2. Graceful degradation: Fully implemented with responsive UI components and configurable messages

The kill switch implementation provides a robust, secure, and user-friendly way to manage agent status with immediate effect and clear visual feedback.