Definition
Plain language
The all-powerful administrator account on a computer that can change anything.
As stated in the literature
The superuser account on Unix-like systems with unrestricted privileges; escalation to root is the high-value target in privilege-escalation attacks and in the agent-meltdown cascade case study.
Why it matters: Because it has unlimited control, gaining it is the prize attackers chase and the worst-case outcome when an agent's permissions spiral out of control.
For example, an attacker who gains the root account can read any file, install anything, or shut the whole machine down.
Heard on the show
“… lines — they show that the size of the task gradient on a given prompt is capped above by the square root of the reward variance on that prompt. …”Episode 010 — When Reward Climbs But Reasoning Goes Generic: Diagnosing Template Collapse in Agentic RL