Here’s a practical, conservative development plan for building the DRIS Matrix Mesh (Rust on IBM Cloud), derived from all seven chapters of your article. I grouped work into milestones with clear outcomes, risks, and buffers. Timeframes assume a small senior team (2–4 engineers) with shared DevOps. If you’re solo, double the durations.

Phase 0 — Inception & Guardrails (2–3 weeks)

Goals

• Refine scope from Chapter 1 “Services & Practices” and Chapter 2 “Architecture & Infrastructure”: regions/AZs, VPC, LB, CIS/Anycast, Satellite edge, service mesh SLOs. Notion+1
• Choose core comms (gRPC over HTTP/2 vs QUIC) and auth (mTLS) per Ch.2. Notion
• Define “cell” boundaries (bounded state domains) and delta model per Ch.2/Ch.3. Notion+1

Deliverables

• Architecture decision record (ADR) set; “Matrix Mesh” domain map; SLOs & error budgets; threat model.
• Project skeleton (Cargo workspace; crates for traits, mesh, platform::ibm, telemetry) per Ch.3 module layout. Notion

Risks/Notes

• Cloud account + quotas; region/AZ choice impacts DR drills (Ch.1/2). Notion+1

Phase 1 — Platform Foundations on IBM Cloud (4–6 weeks)

Goals

• Provision VPC, subnets across three AZs, L4/NLB + L7/ALB, security groups, routing. (Ch.1 §1.2; Ch.2 §2.3) Notion+1
• Stand up IKS/OpenShift cluster spanning AZs; install service mesh stack (mTLS, retries, circuit breaking). (Ch.2 §2.2) Notion
• Configure IBM Cloud Internet Services (Anycast/Geo LB, health pools) for global entry. (Ch.1 §1.3) Notion
• Optional: set up Satellite for edge bursts. (Ch.1 §1.4) Notion

Deliverables