curl --request POST \
  --url https://api.wacht.dev/api/agent/contexts \
  --header 'Content-Type: application/x-www-form-urlencoded' \
  --cookie session_id= \
  --data 'title=Customer Support Conversation' \
  --data 'system_instructions=You are a helpful customer support assistant.'

{
  "id": "123456789012345678",
  "deployment_id": "111111111111111111",
  "context_group": "support-agents",
  "title": "Customer Support Conversation",
  "system_instructions": "You are a helpful customer support assistant.",
  "status": "active",
  "message_count": 15,
  "created_at": "2024-01-15T10:30:00Z",
  "updated_at": "2024-01-15T11:30:00Z"
}