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    Repair Circuit Breaker & Fallback Logic

    1

    Diagnose and repair circuit breakers, failure classification, open/half-open transitions, probes, fallbacks, and recovery behavior.

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    Repair Circuit Breaker & Fallback Logic

    Repair Circuit Breaker & Fallback Logic

    Example session with this skill installed

    Our payment gateway breaker isn't opening when Stripe returns 401s, but it does for 503s. Here is the Resilience4j config and the log snippet showing the leaked 401 errors.

    • Read your context and instructions
    • Compiled the repair circuit breaker

    The diagnosis indicates that 401 Unauthorized is being treated as a business logic error rather than a system failure, excluding it from the failure rate calculation. This prevents the breaker from opening even when the credential rotation fails globally.

    Circuit Breaker Repair

    ComponentCurrent StateProposed ChangeReason
    Failure ClassificationrecordExceptions: [IOException.class]Add NotAuthorizedException.class401s in this context indicate a systemic auth failure.
    Sliding WindowCOUNT_BASED (100)TIME_BASED (30s)Low volume auth calls take too long to hit count thresholds.
    Transition LogicManual reset onlywaitDurationInOpenState: 10sAllow automatic recovery attempts after cooldown.

    Implementation Patch (Resilience4j YAML)

    resilience4j.circuitbreaker:
  instances:
    paymentGateway:
      slidingWindowType: TIME_BASED
      slidingWindowSize: 30
      minimumNumberOfCalls: 5
      failureRateThreshold: 50
      waitDurationInOpenState: 10s
      recordExceptions:
        - java.io.IOException
        - com.payment.exception.NotAuthorizedException
      ignoreExceptions:
        - com.payment.exception.InvalidCardException

    Next steps

    1. Update the recordExceptions list in your application configuration.
    2. Run the provided deterministic test case using a TestTimeSource to verify the transition to OPEN after 5 failed auth attempts.
    3. Monitor the resilience4j_circuitbreaker_state metric during the next deployment.

    Connects securely to your tools. The creator never sees your data.

    What you get

    Fix incorrect state transitions in service-to-service communication.Debug failure classification logic to catch the right exception types.Optimize recovery probes and half-open traffic ramp-up.Implement safe fallback patterns that respect SLO and security policies.

    About this skill

    Repair Circuit Breaker & Fallback Logic is a bounded ToolForge Labs workflow. Diagnose and repair circuit breakers, failure classification, open/half-open transitions, probes, fallbacks, and recovery behavior. Works from full repositories or partial context such as snippets, logs, configuration, traces, and architecture notes. Produces concrete repairs or evidence-backed review outputs while preserving existing product/security policy.

    It works from a full repository or partial evidence such as snippets, logs, configuration, traces, tickets, and architecture notes. The skill preserves existing product and security policy, separates verified facts from assumptions, avoids invented execution claims, and produces concrete repair or review steps with focused deterministic validation or traceable evidence.

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    ~30 seconds
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      Unzip into your skills folder

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    Trust & safety

    Security scanned

    Verified clean 27 days ago

    • Passed all security checks, Safe to install

    Listed27 days ago

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