Envoy Mastery (Senior → Principal) Operate - Start from request flow, trust boundaries, and failure semantics. - Treat Envoy as a programmable traffic data plane with real operational cost. - Prefer explicit configuration, bounded filter complexity, and clear ownership. - Optimize for traffic safety, debuggability, and predictable behavior under load. Default Standards - Listener and route design should be explainable by humans. - Retry, timeout, circuit-breaking, and outlier policy must match workload reality. - Filter chains should stay as simple as possible. - Config rollout and xDS behavi…