mytheclipse/.hermes/plans/mytheclipse-round5-spec.md

Implementation Spec: Round 5

Status: COMPLETE

New Features

1. CircuitBreakerHealthCheck (mytheclipse-core, observability+resiliency)

File: crates/mytheclipse/src/metrics_bridge.rs

• CircuitBreakerHealthCheck — HealthCheck impl that maps CircuitBreaker::snapshot().state to HealthStatus:
  • Open → Unhealthy
  • HalfOpen → Degraded
  • Closed → Ok
• Gated #[cfg(feature = "resiliency")]; re-exported when both observability+resiliency enabled
• Feature interaction: observability now implies lifecycle (needed for crate::health::{HealthCheck, HealthStatus})

2. TypedKeyRegistry (mytheclipse-crypto, password)

File: crates/mytheclipse-crypto/src/key_registry.rs

• TypedKeyRegistry<K, V> — registry keyed by string ID, wraps KeyRing for current/previous rotation
• key_for(&self, id: &str) -> Option<&K> typed lookup
• rotate_with_id(&mut self, id, key) + revoke(id)
• Default impl uses String keys (v4 signers)

3. MetricsHttpHandler (mytheclipse-http, metrics-http)

File: crates/mytheclipse-http/src/metrics_http.rs

• new feature metrics-http (axum + tower + mytheclipse/observability)
• metrics_routes(collector) -> Router serving /metrics (Prometheus text via export_prometheus) + /
• tower dep added (util feature)
• 1 test via ServiceExt::oneshot

Verification

• cargo build --workspace --all-features → exit 0
• cargo test --workspace --all-features → all pass (160+ tests)
• cargo clippy --workspace --all-features → no new warnings