EFFECT_ROLLBACK_PARTIAL

What failed

rollbackOnError() threw RollbackError because one or more recovery units failed, were unavailable, remained ambiguous, or could not be reversed.

Fix

Inspect error.result before deciding what to retry or escalate:

try {
  await rollbackOnError(run);
} catch (error) {
  if (error instanceof RollbackError) {
    for (const unit of error.result?.units ?? []) {
      console.error(unit.effectIds, unit.status, unit.error);
    }
  }
}

error.cause retains the original callback failure. error.recoveryError retains the underlying recovery-system error when one exists. Do not treat a partial result as a successful rollback; reconcile ambiguous units and retry only units whose external semantics make that safe.

See Read a RollbackResult for aggregate and per-unit status guidance.