Plugin
system-error-handling-strategy
System-level error strategy — 8-class taxonomy (programmer / validation / domain / transient / resource-exhaustion / poison / external-contract / unknown) with per-class strategy (fail-fast / 4xx / retry+budget / shed-load / DLQ / circuit-break / pin+escalate / fail-safe). Retry budgets with deadline propagation, breaker states + thresholds, timeout cascade rule, idempotency patterns, propagation + translation at layer boundaries (no stack leaks), DLQ per source, SLO-burn alerts, user-vs-operator messages, runbook coupling.