langchain-ai/langchainjs @langchain/core@1.2.8 on GitHub

#11369 d6ad973 Thanks @hntrl! - fix(langchain): use unified endpoint for gateway
#11342 3b0e4c4 Thanks @thushanth-bengre-langchain! - feat(core): mark errors as retryable or not, and stop retrying the ones that aren't
Retry middleware retried every failure up to maxRetries, including deterministic ones like a bad API key or an unknown model. Retries also nest, so a single such failure could cost dozens of API calls.
@langchain/core/errors adds stampRetryable(error, retryable) and getRetryable(error). Marking an error leaves its class and shape untouched, so a provider SDK error can be classified without breaking instanceof. getRetryable returns undefined for errors nobody classified, and both are exported so tool authors can mark their own failures.
modelRetryMiddleware and toolRetryMiddleware now respect the mark by default, and retries stop as soon as one is found rather than each layer spending its own budget. Aborted calls, context overflow, and oversized payloads are marked non-retryable out of the box.
Models accept a per-call maxRetries so a surrounding retry loop can take over.
Behavior change: errors marked non-retryable now fail on the first attempt. Unclassified errors — including any from third-party integrations or custom tools — retry exactly as before. Pass retryOn: () => true to restore the old default. A custom onFailedAttempt replaces the built-in handler and opts out of marking.