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Adaptive Agility

4.7 — The Full Stack

This is the complete picture. Every concept from Phase 0 through Phase 4 lives somewhere in this diagram. The AI stack you drew in Phase 0 has expanded into this.

┌──────────────────────────────────────────────────────────────────┐
│                        YOU — THE ORCHESTRATOR                     │
│  Vision, judgment, guardrails, decisions about what to build      │
├──────────────────────────────────────────────────────────────────┤
│                     AGENTIC LAYER                                 │
│  Multi-agent systems, orchestration, delegation, memory           │
├──────────────────────────────────────────────────────────────────┤
│                     HARNESS LAYER                                 │
│  Claude Code, hooks, CLAUDE.md, MCP servers, settings             │
├──────────────────────────────────────────────────────────────────┤
│                     AI LAYER                                      │
│  Models (Opus, Sonnet, GPT), context windows, tool use            │
├──────────────────────────────────────────────────────────────────┤
│                     APPLICATION LAYER                             │
│  Frontend, backend, APIs, databases, state management             │
├──────────────────────────────────────────────────────────────────┤
│                     INFRASTRUCTURE LAYER                          │
│  Servers, containers, CI/CD, DNS, hosting, monitoring             │
├──────────────────────────────────────────────────────────────────┤
│                     FOUNDATION LAYER                              │
│  Git, terminal, file systems, networking, security                │
└──────────────────────────────────────────────────────────────────┘

You Don’t Need to Master Every Layer

Section titled “You Don’t Need to Master Every Layer”

You need to:

  1. Understand what each layer does — so you can reason about where a problem lives and who to involve
  2. Know enough vocabulary to discuss any layer with specialists — you’ve built that vocabulary across all five phases
  3. Be able to build at the Agentic and Harness layers — that’s your zone of ownership and where your leverage is highest
  4. Know when to delegate lower layers to engineers or existing services — containers, DNS, CI/CD pipelines, infrastructure monitoring — these are real disciplines. Delegate with clarity, not confusion.

The Foundation Layer was Phase 0. The Harness Layer was Phase 3. The Agentic Layer is this phase. You now have a mental model for all seven.

Next: 4.8 — Vocabulary | Phase overview: Phase 4