ReadonlycapabilityOptionalcauseReadonlycodeStable machine-routable failure class. Route on this, never on message.
ReadonlyfailureFrozen serializable facts, safe to hand to a durable writer.
OptionalstackReadonlysupportStaticstackThe Error.stackTraceLimit property specifies the number of stack frames
collected by a stack trace (whether generated by new Error().stack or
Error.captureStackTrace(obj)).
The default value is 10 but may be set to any valid JavaScript number. Changes
will affect any stack trace captured after the value has been changed.
If set to a non-number value, or set to a negative number, stack traces will not capture any frames.
StaticcaptureCreates a .stack property on targetObject, which when accessed returns
a string representing the location in the code at which
Error.captureStackTrace() was called.
const myObject = {};
Error.captureStackTrace(myObject);
myObject.stack; // Similar to `new Error().stack`
The first line of the trace will be prefixed with
${myObject.name}: ${myObject.message}.
The optional constructorOpt argument accepts a function. If given, all frames
above constructorOpt, including constructorOpt, will be omitted from the
generated stack trace.
The constructorOpt argument is useful for hiding implementation
details of error generation from the user. For instance:
function a() {
b();
}
function b() {
c();
}
function c() {
// Create an error without stack trace to avoid calculating the stack trace twice.
const { stackTraceLimit } = Error;
Error.stackTraceLimit = 0;
const error = new Error();
Error.stackTraceLimit = stackTraceLimit;
// Capture the stack trace above function b
Error.captureStackTrace(error, b); // Neither function c, nor b is included in the stack trace
throw error;
}
a();
OptionalconstructorOpt: FunctionStaticprepare
The seam's thrown error. Carries the same LlmFailure an in-band terminal finish would carry, so the two sanctioned error paths — a throw from
stream(), or afinish {kind:"error"|"aborted", failure}— produce one type for consumers and one set of facts for the durable row.The constructor validates rather than trusts. Every one of these values came from a provider response and is heading for a signed event; a status of
"429 ", a negative retry delay or an empty request id must fail here, at the boundary, and not be discovered later inside an anchored row.