Phase 1: Spec-Driven Development · 45 min · Claude Code · Python

From Spec to Plan to Tasks

Build the thinnest path through the whole system first. Save the hard part for last and you find out it's unworkable after everything else is already built.

What you will learn

Explain the walking skeleton pattern and why it should be the first task in any execution plan
Apply hardest-first ordering to a task breakdown and justify why it beats easiest-first
Decompose a real spec's acceptance criteria into an ordered, executable task list
Produce a full spec and task breakdown for your own course-long product

Introduction

From Spec to Plan to Tasks

Objective

Build a task sequencer that places the walking skeleton first and orders the remaining tasks by descending risk, and that refuses to produce a plan when zero or multiple tasks are marked as the skeleton.

Unlock the full lesson

You've read the first 2 sections. The rest of this lesson covers The Problem, The Concept, Build, Check Yourself, Key Terms & Next — plus a hands-on lab, quiz, and project artifact.

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