Context

The relevant information the agent has access to right now. The abstract noun — not the raw input the model sees (that's the context window), not the running history (that's the session), but what the agent knows that's pertinent to the task. "Loading something into context" means making it part of this set; "context engineering" is the discipline of curating it.

Usage:

"It keeps inventing fields that aren't in the type."

"The type file isn't in context — it's reading the call sites and guessing. Read the definition in first."