Errorcore

Errorcore is runtime context layer for production failure for Node.js.

When something breaks in production, logs and stack traces often show where it failed, but the execution state that explains why is already gone.

Errorcore preserves runtime evidence from the exact failed execution, including local state, async lineage, request context, and ordered I/O. Engineers and coding agents can investigate what actually happened without adding more logs, redeploying, and waiting for the failure to happen again.

Keep your observability stack. Add the failed execution.