ADR for sidecar vs eBPF service mesh in 2026 — context, options (Istio Ambient, Cilium Mesh, Linkerd2), trade-offs, consequences, and the decision criteria we settled on.
Architecture decision record for adopting eBPF-based observability in Kubernetes. Comparison with traditional APM agents, Cilium/Hubble/Pixie evaluation, performance overhead analysis, and migration path.