resilience-patterns

# Resilience Patterns Skill

Production-grade resilience patterns for distributed systems and LLM-based workflows. Covers circuit breakers, bulkheads, retry strategies, and LLM-specific resilience techniques.

## Overview

- Building fault-tolerant multi-agent systems
- Implementing LLM API integrations with proper error handling
- Designing distributed workflows that need graceful degradation
- Adding observability to failure scenarios
- Protecting systems from cascade failures

## Core Patterns

### 1. Circuit Breaker Pattern (reference: circuit-breaker.md)

Prevents cascade failures by "tripping" when a service exceeds failure thresholds.

```
+-------------------------------------------------------------------+
|                    Circuit Breaker States                         |
+-------------------------------------------------------------------+
|                                                                   |
|    +----------+     failures >= threshold    +----------+         |
|    |  CLOSED  | ----------------------------> |   OPEN   |        |
|    | (normal) |                              | (reject) |         |
|    +----+-----+                              +----+-----+         |
|         |                                         |               |
|         | success                    timeout      |               |
|         |                            expires      |               |
|         |         +------------+                  |               |
|         |         | HALF_OPEN  |<-----------------+               |
|         +---------+  (probe)   |                                  |
|                   +------------+                                  |
|                                                                   |
|   CLOSED:    Allow requests, count failures                       |
|   OPEN:      Reject immediately, return fallback                  |
|   HALF_OPEN: Allow probe request to test recovery                 |
|