Circuit Breaker & Resilience

Resilience library for service-to-service calls: circuit breaking, retry budgets and jittered backoff, bulkheads and timeouts, and how they compare to Resilience4j and Envoy

A low-level design worked end to end in Python — from the reasoning you'd show an interviewer through to the production architecture.

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Page	What's in it
Thought Process	How to reason about this design in an interview
Implementation	Full annotated source with the patterns called out
High-Level Design	Architecture, scaling and failure modes
Interview Questions	Follow-up questions with worked answers

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Runnable source: circuit_breaker.py

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