Hunter Brennick AI Systems & Advisory ↗
AI Systems Orchestration
Part III · Applying And Deciding/Chapter 11
11

Fast Path And Reading List

The compressed path: build enough taste quickly that you can make good system choices this week.

8 min read1 figures
The gist
  • Four passes: 90 minutes → one day → three days → one week.
  • Do not add more than one serious abstraction in the same week.
  • Best first project: the tool fitness bench — better tools improve every agent.
  • Speed comes from removing choices until the system proves it needs them.
THE FAST PATH · FOUR PASSES 90 min 1 day 3 days 1 week Orientation four core reads one page of answers enough to stop flailing One day build smallest useful version one path that leaves evidence behind Three day sprint day 1 · simple workflow day 2 · operational discipline day 3 · decide the next layer One week upgrade choose exactly one graph · durable runner · tool bench routing scorecard · failure corpus do not add more than one serious abstraction in the same week speed comes from removing choices until the system proves it needs them
FIG 11.1Four passes: ninety minutes then one day then three days then one week.

The Fast Path

If you need to move fast do this in passes.

Pass 1: 90-Minute Orientation

Write one page:

What is this trying to orchestrate?
Where should control live?
What tools/context are needed?
What state must survive?
What needs evals or human approval?

That is enough to stop flailing.

Pass 2: One-Day Build

Pick one real task and build the smallest useful version.

Use this shape:

intake
  -> context
  -> action
  -> verify
  -> artifact

Do not start with ten agents. Start with one path that leaves evidence.

Output:

runs/<task>/
  input.md
  notes.md
  tool-outputs/
  final.md
  eval.md
Definition of done
the system can run the task once
the output is inspectable
one failure mode is written down
one eval/check exists
you know what layer is missing next

Pass 3: Three-Day Sprint

Day 1: Build the simple workflow.

  • one task
  • one model route
  • one or two tools
  • one artifact contract
  • one manual eval

Day 2: Add operational discipline.

  • trace what happened
  • record tool calls
  • record cost/latency if available
  • add a failure note
  • add one human approval gate if risk exists

Day 3: Decide the next layer.

Use the promotion rule:

Need branches or state? Add graph.
Need retries or delayed work? Add durable runner.
Need better tools? Improve MCP/tool shape.
Need quality proof? Add eval bank.
Need repeatability across clients? Add or refine a shared workflow definition.

Pass 4: One-Week Upgrade

Only after the three-day sprint works choose one upgrade:

  • LangGraph-style graph for state and branching
  • Temporal/Inngest-style durable execution for retries and waits
  • tool fitness bench for your MCP surface
  • model routing scorecard for cost and latency
  • failure corpus for eval-driven improvement
  • run ledger for cross-system learning

Do not add more than one serious abstraction in the same week.

What To Read First

Must Read

Read When You Hit The Problem

What To Skip For Now

Skip anything that does not answer a current design question.

Specifically do not spend the first week on:

  • comparing every agent framework
  • building a general platform before a real workflow works
  • chasing multi-agent swarms before a single-agent baseline exists
  • chasing self-improvement loops before an eval bank exists
  • adding durable infrastructure before there is a retry problem or a wait problem or a resume problem
  • studying protocol theory before there is a tool or context boundary to expose

Speed comes from removing choices until the system proves it needs them.

The First Real Project

Build one of these first:

  1. Tool Fitness Bench: tests whether a local MCP/tool is agent-friendly.
  2. Agent Run Ledger: normalizes run metadata and artifacts and evals and failures and cost and latency.
  3. AI Orchestration Lab: runs the same task through one-shot and workflow and graph and human-in-loop patterns.
  4. Workflow Promotion Checklist: decides when prose becomes a script or a graph or a durable runner or a service.

Best first pick:

Tool Fitness Bench.

Reason: tools are the leverage point you already have. Better tools improve every agent and every workflow without forcing a runtime decision too early.

What To Remember

Move fast. Do not move blind.

The durable principles
  • Start with one real task.
  • Keep the first system inspectable.
  • Use workflows when steps are known.
  • Use agents when decisions are open-ended.
  • Use graphs when state, branching, or recovery matters.
  • Use durable runners when time and failure matter.
  • Use artifacts so humans can inspect the work.
  • Use evals before claiming improvement.
  • Use protocols at boundaries.
  • Keep humans where consequences matter.

The goal is not to finish a curriculum. The goal is to build taste by shipping small and inspectable systems quickly.

Next chapterChapter 12 · Stack Selection Field Guide Turning the curriculum into choices: when to use an SDK, graph runtime, durable workflow engine, protocol, or local control plane.