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Intro

Module 5 introduces Spec-Driven Development: drafting a precise spec—requirements, design, and plan—that agents can execute, blending TDD discipline with custom helper agents to explore architecture, refine plans, and implement confidently.

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Video lesson

Course on Udemy
The full video is available on Udemy.

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Key takeaways

  • Treat specs as living contracts—capture goals, user stories, architecture notes, and planned steps before asking agents to code.
  • Store specs alongside the project (e.g., specs/spec.md) so agents can read them directly and you can version-control the rationale.
  • Use agents to research existing structure: a tailored “SpecHelper” can survey APIs/components, annotate current behavior, and propose pseudocode adjustments.
  • Validate the helper’s findings line by line; clarifying early (e.g., total agent count source) prevents downstream confusion.
  • Encode implementation “tenets” in the plan—follow TDD, run lint before each commit, keep commits scoped—to align agent actions with team standards.
  • Transform high-level draft steps into actionable checklists; ASCII checkboxes make progress visible during the build.
  • During implementation, loop with the Code Agent: read the spec, execute each checkbox (tests first, then code, lint, commit), and iterate until all pass.
  • Finish with manual verification for UI changes, then hand back to the agent for final linting and commit to maintain consistency.