Returns true for errors that retrying the SSE subscription can never
fix: any HTTP 4xx status (auth failure, axon gone, invalid request)
except the explicitly transient 408 (request timeout) and 429 (rate
limit). 5xx, network errors, and everything else stay retryable. Matches
the status property carried by @runloop/api-clientAPIError
subclasses without a runtime dependency on the peer's class identities.
Returns
truefor errors that retrying the SSE subscription can never fix: any HTTP 4xx status (auth failure, axon gone, invalid request) except the explicitly transient 408 (request timeout) and 429 (rate limit). 5xx, network errors, and everything else stay retryable. Matches thestatusproperty carried by@runloop/api-clientAPIErrorsubclasses without a runtime dependency on the peer's class identities.