spec-driven-development

Spec-driven development prevents ambiguity by requiring a structured specification before coding. It creates a shared understanding using a six-section template covering objectives, commands, structure, code style, testing, and boundaries to reduce rework across teams.

To write a project specification, capture the objective, commands, expected structure, coding standards, testing approach, and boundaries. Commit this spec to your repository, then follow a structured plan, tasks, and implementation workflow to deliver predictably.

You should create a specification at project inception, when requirements are ambiguous, or when architectural decisions affect multiple modules. Early specs surface assumptions and align stakeholders before implementation begins.

Yes, specifications must be version-controlled and continuously updated as decisions change. Treating specs as living documents within the repository ensures the project requirements stay aligned with the actual codebase development.

The best way to align stakeholders is using a structured spec template to surface early assumptions and ask clarifying questions. Defining boundaries and testing strategies upfront improves delivery predictability and quality.

Spec-driven development requires continuous maintenance; if the specification is not updated as decisions change, it loses value. It also demands upfront time to surface assumptions and clarify questions before implementation can proceed.