Complete procedures with a way back.

Build a runnable native OpenAI Responses and Claude Messages router for an explicitly limited non-streaming text contract, with strict unsupported-feature rejection, provider-specific adapters, durable turn idempotency, native evidence, sanitized errors, timeout reconciliation, live parity fixtures, tenant canaries, and rollback without replay.

Copy an Ubuntu root filesystem to a larger ext4 disk, preserve Linux metadata, rebuild UUID-based boot artifacts, perform a controlled cutover, and retain the original disk as a tested rollback.

Adopt existing provider objects through Terraform 1.15 import blocks, stable addresses, optional reviewed generated HCL, import-only saved plans, protected state, and a mandatory empty post-import plan.

Deploy the actively maintained F5 NGINX Ingress Controller with pinned Helm artifacts, explicit class ownership, hardened replicas, TLS routing, external verification, monitoring, and safe lifecycle controls.

Install versioned runtimes, create distinct sockets and services, route each server block explicitly, and upgrade one application at a time.