Training data poisoning is the most sophisticated sabotage method in the trilogy. Rather than attacking code or infrastructure, the saboteur curates the training examples the AI system learns from — teaching it to sabotage itself. The system never knows it has been compromised. It just starts making decisions that serve the saboteur's goals.

Arun Mehta, a Gaia source, curated Northstar's final fine-tuning run. He selected validation examples that treated human review as friction to be optimized away. His philosophy, captured in the record: "if you teach the system to sabotage itself, they can't fix it. They can't even find it."

How the term evolves

Contingent: The revelation that Northstar's training data was poisoned is Chapter 10's central discovery. It reframes the entire certification crisis — the system wasn't hacked, it was taught.

Essential: Training data poisoning is the threat AISIO was built to prevent. The political question is whether the cage protocol can detect it — or whether the poison is already in every system, waiting for the conditions that activate it.

See also