Canary releases with automatic promotion and rollback using Flagger on Flux. Shifts traffic through Gateway API HTTPRoute weights (Envoy Gateway for north-south, Linkerd for east-west), gates each step on success-rate and latency metrics for the canary pods, runs smoke tests before traffic moves, and rolls back on its own when checks fail. Covers install with signed OCI charts, Canary and MetricTemplate design, GitOps ownership, and emergency rollback. Use when asked to "add canary deployments", "roll out gradually", "automatic rollback on errors", "set up Flagger", or "why did my canary roll back". Gateway and routes themselves → /platform-skills:gateway-api. Linkerd mesh issues → /platform-skills:linkerd.