Dev.to
7/1/2026

The original title is "Starting with Spec-Driven Development: Spec first, Prompt later."
Original: Starting with Spec-Driven Development: Spec first, Prompt later.
Short summary
Spec-Driven Development reverses typical AI-agent workflows: write detailed specifications and contract tests before prompting implementation. This prevents AI from encoding its own assumptions into specs and tests, ensuring successful outcomes. The methodology requires upfront thinking but catches critical behavior decisions that would otherwise be skipped.
- •Write detailed specs in markdown before prompting AI agents, not after
- •Have AI write tests from your spec, then implement to pass tests
- •Prevents AI from agreeing with itself on wrong assumptions
Generated with AI, which can make mistakes.
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