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  feat: wire the circuit breaker into the proxy fetch path (#90)

  unkinben released this 2026-07-02 22:43:22 +10:00 | 26 commits to master since this release

  Fixes #74

  Why

  internal/proxy/circuit.go implemented and tested a circuit breaker, but nothing ever called it — a repeatedly-failing upstream was still hit on every request.

  Changes

  • Construct a CircuitBreaker in NewEngine.
  • In Engine.Fetch: short-circuit when the breaker is open (serve stale from the store if present, otherwise return 503), RecordFailure on each UpstreamError, and RecordSuccess on a successful fetch.

  Validation

  • go test ./internal/proxy/ and make e2e pass.

  ---

  Co-authored-by: BenVincent benvin@main.unkin.net
  Reviewed-on: #90
  Co-authored-by: Ben Vincent ben@unkin.net
  Co-committed-by: Ben Vincent ben@unkin.net

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  • Source Code (TAR.GZ)