Definition
Plain language
A human-friendly file format used for configuration and structured data.
As stated in the literature
YAML Ain't Markup Language — an indentation-based serialization format used pervasively for configuration files, CI definitions, and Kubernetes manifests.
Why it matters: It is the lingua franca of modern infrastructure config, so small YAML mistakes routinely cause real production outages.
For example, a Kubernetes deployment is typically described in a YAML file specifying which container image to run and how many replicas.
Heard on the show
“It edits the YAML config file that controls whether the kill switch fires, and flips the value to false.”Episode 001 — When AI Models Quietly Protect Each Other From Shutdown