name: circuit-breaker description: Agent hata toleransi ve devre kesici pattern. Ust uste hata yapan agent'i durdur, cooldown uygula, fallback'e gec. Kaskatli hatalari ve sonsuz retry dongularini onler.

Circuit Breaker for Agents

Agent'lar da servisler gibi basarisiz olabilir. Ayni hatayi tekrar tekrar denemek token israf eder ve sorunu cozmez. Circuit breaker bunu onler.

3 Durum

CLOSED (Normal)
  Agent calisir, hatalar sayilir.
  Hata esigi asilirsa → OPEN'a gec.

OPEN (Devre Kesik)
  Agent CALISTIRILMAZ.
  Cooldown suresi boyunca bekle.
  Cooldown bitince → HALF-OPEN'a gec.

HALF-OPEN (Test)
  Tek bir istek gonder.
  Basarili → CLOSED'a don.
  Basarisiz → OPEN'a geri don (cooldown uzat).

     basarili          hata esigi
  ┌──────────┐      ┌───────────┐
  │          │      │           │
  ▼          │      ▼           │
CLOSED ──────┼── OPEN ────── HALF-OPEN
  ▲          │      │           │
  │          │      │           │
  └──────────┘      └───────────┘
     normal          cooldown bitti

Konfigrasyon

interface CircuitBreakerConfig {
  failureThreshold: number    // Kac hata sonrasi OPEN (default: 3)
  cooldownMs: number          // OPEN'da bekleme suresi (default: 60000 = 1 dk)
  halfOpenMaxAttempts: number // HALF-OPEN'da max deneme (default: 1)
  resetAfterMs: number        // Hata sayacini sifirla (default: 300000 = 5 dk)
  onOpen?: () => void         // OPEN'a gecince cagrilir
  onClose?: () => void        // CLOSED'a donunce cagrilir
}

const DEFAULT_CONFIG: CircuitBreakerConfig = {
  failureThreshold: 3,
  cooldownMs: 60000,
  halfOpenMaxAttempts: 1,
  resetAfterMs: 300000,
}

Uygulama

Agent Seviyesinde

class AgentCircuitBreaker {
  private state: 'CLOSED' | 'OPEN' | 'HALF-OPEN' = 'CLOSED'
  private failures = 0
  private lastFailureTime = 0
  private config: CircuitBreakerConfig

  constructor(private agentName: string, config?: Partial<CircuitBreakerConfig>) {
    this.config = { ...DEFAULT_CONFIG, ...config }
  }

  canExecute(): boolean {
    if (this.state === 'CLOSED') return true

    if (this.state === 'OPEN') {
      const elapsed = Date.now() - this.lastFailureTime
      if (elapsed >= this.config.cooldownMs) {
        this.state = 'HALF-OPEN'
        return true
      }
      return false
    }

    // HALF-OPEN: tek denemeye izin ver
    return true
  }

  recordSuccess(): void {
    this.failures = 0
    if (this.state === 'HALF-OPEN') {
      this.state = 'CLOSED'
      this.config.onClose?.()
    }
  }

  recordFailure(): void {
    this.failures++
    this.lastFailureTime = Date.now()

    if (this.state === 'HALF-OPEN') {
      this.state = 'OPEN'
      return
    }

    if (this.failures >= this.config.failureThreshold) {
      this.state = 'OPEN'
      this.config.onOpen?.()
    }
  }

  getStatus(): { state: string; failures: number; agent: string } {
    return { state: this.state, failures: this.failures, agent: this.agentName }
  }
}

Kullanim Ornegi

const breakers: Record<string, AgentCircuitBreaker> = {
  'code-reviewer': new AgentCircuitBreaker('code-reviewer', { failureThreshold: 3 }),
  'security-reviewer': new AgentCircuitBreaker('security-reviewer', { failureThreshold: 2 }),
  'sleuth': new AgentCircuitBreaker('sleuth', { failureThreshold: 3 }),
}

async function spawnAgent(name: string, task: string): Promise<string> {
  const breaker = breakers[name]

  if (!breaker?.canExecute()) {
    console.warn(`Circuit OPEN: ${name} -- fallback kullaniliyor`)
    return executeFallback(name, task)
  }

  try {
    const result = await executeAgent(name, task)
    breaker.recordSuccess()
    return result
  } catch (error) {
    breaker.recordFailure()
    console.error(`${name} basarisiz (${breaker.getStatus().failures}/${3})`)

    if (!breaker.canExecute()) {
      return executeFallback(name, task)
    }
    throw error
  }
}

Fallback Zinciri

Agent devre disiyken ne yapilacagi:

Hata Tipleri

Her hata ayni agirlikta degil:

Monitoring

Status Dashboard

#!/bin/bash
# scripts/circuit-status.sh

echo "=== Agent Circuit Breaker Status ==="
echo ""
printf "%-25s %-10s %-10s\n" "Agent" "State" "Failures"
echo "-------------------------------------------"

# Canavar skill-matrix'ten oku
if [ -f ~/.claude/canavar/skill-matrix.json ]; then
  cat ~/.claude/canavar/skill-matrix.json | \
    jq -r '.agents | to_entries[] | "\(.key) \(.value.failures // 0) \(.value.state // "CLOSED")"' | \
    while read name failures state; do
      if [ "$state" = "OPEN" ]; then
        printf "%-25s \033[31m%-10s\033[0m %-10s\n" "$name" "$state" "$failures"
      elif [ "$state" = "HALF-OPEN" ]; then
        printf "%-25s \033[33m%-10s\033[0m %-10s\n" "$name" "$state" "$failures"
      else
        printf "%-25s \033[32m%-10s\033[0m %-10s\n" "$name" "CLOSED" "$failures"
      fi
    done
fi

Alert Kurallari

WARN:  Agent 2+ ust uste basarisiz
ERROR: Circuit OPEN'a gecti
CRIT:  3+ agent ayni anda OPEN (sistemik sorun)

Exponential Backoff

Tekrarlayan hatalarda cooldown suresini artir:

1. hata → 1 dakika cooldown
2. hata → 2 dakika cooldown
3. hata → 4 dakika cooldown
4. hata → 8 dakika cooldown
Max: 15 dakika

Basarili calisma → cooldown sifirla

Anti-Pattern'ler

YAPMA: Her hatada agent'i hemen tekrar calistir
YAP:   Circuit breaker ile kontrol et

YAPMA: Hatalari sessizce yut
YAP:   Logla, say, esik kontrolu yap

YAPMA: Tek hata tipine gore devre kes
YAP:   Hata tipine gore agirlik ver

YAPMA: Sonsuz retry dongusu
YAP:   Max retry + exponential backoff + fallback

YAPMA: Tum agent'lar icin ayni esik
YAP:   Kritik agent'lar (security) icin dusuk esik

vibecosystem Entegrasyonu

• auto-skill-activation rule: Agent fail oldugunda fallback zincirini kullanir
• canavar: Hata sayilarini skill-matrix.json'a kaydeder
• reputation-engine: Circuit breaker durumunu guvenilirlik skoruna yansitir
• sentinel agent: Circuit OPEN alert'lerini yonetir
• self-learner agent: Tekrarlayan hatalardan pattern ogrenir
• qa-loop rule: 3x fail sonrasi escalation zaten mevcut -- circuit breaker bunu destekler