TraceSpan

One call inside a decision, and what it cost

Attributes (7)

Attribute	Type	Required	Description
at	string	Yes	When the call ended, which is when its cost was known
op	string	Yes	Dotted and stable: job.run, plugin.invoke, llm.generate
target	string	No	Which one: a plugin and its method, or a model
ms	number	Yes	How long it held, measured around the call rather than reported by it
outcome	TraceOutcome	Yes
error	string	No	The failure, summarized to a shape rather than a stack
detail	Record<string, unknown>	No	Whatever this op is worth reading back: tokens, a finish reason, the bound it was given