curl --request GET \
  --url https://api.devin.ai/v1/sessions/{session_id} \
  --header 'Authorization: Bearer <token>'

{
  "session_id": "devin-abc123def456",
  "status": "running",
  "title": "Review PR #123",
  "created_at": "2024-01-01T00:00:00.000000+00:00",
  "updated_at": "2024-01-01T00:05:30.123456+00:00",
  "snapshot_id": null,
  "playbook_id": null,
  "tags": [
    "api",
    "documentation",
    "review"
  ],
  "pull_request": {
    "url": "https://github.com/example/repo/pull/123"
  },
  "structured_output": {
    "result": "success",
    "files_modified": 3
  },
  "status_enum": "blocked",
  "messages": [
    {
      "type": "initial_user_message",
      "event_id": "event-abc123-def4-5678-9012-abcdef123456",
      "message": "Review the pull request at https://github.com/example/repo/pull/123",
      "timestamp": "2024-01-01T00:00:00.000000+00:00",
      "username": "user@example.com",
      "origin": "web",
      "user_id": "user-123e4567-e89b-12d3-a456-426614174000"
    },
    {
      "type": "devin_message",
      "event_id": "event-def456-abc1-2345-6789-fedcba654321",
      "message": "I'll review the pull request for you. Let me analyze the changes.",
      "timestamp": "2024-01-01T00:00:15.123456+00:00"
    },
    {
      "type": "user_message",
      "event_id": "event-789abc-def0-1234-5678-9abcdef01234",
      "message": "Please focus on the security implications",
      "timestamp": "2024-01-01T00:03:45.987654+00:00",
      "username": "user@example.com",
      "origin": "web",
      "user_id": "user-123e4567-e89b-12d3-a456-426614174000"
    },
    {
      "type": "devin_message",
      "event_id": "event-012def-abc3-4567-8901-23456789abcd",
      "message": "I've completed the security review. Found 2 potential issues that need attention.",
      "timestamp": "2024-01-01T00:05:30.123456+00:00"
    }
  ]
}