Verified Spec-Driven Development (VSDD)
gist.github.com
February 28, 2026
13 min read
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Summary
Verified Spec-Driven Development (VSDD) integrates Spec-Driven Development, Test-Driven Development, and Verification-Driven Development into a single AI-orchestrated pipeline. This methodology emphasizes defining contracts before implementation, writing tests prior to code, and verifying code against specifications.
Key Takeaways
- Verified Spec-Driven Development (VSDD) combines Spec-Driven Development, Test-Driven Development, and Verification-Driven Development into a single AI-orchestrated software engineering pipeline.
- In VSDD, specifications define the functional contract, tests enforce implementation correctness, and adversarial verification ensures thorough scrutiny of the code.
- The Builder generates formal specification documents that include behavioral contracts, interface definitions, edge case catalogs, and non-functional requirements before any code is implemented.
- A Verification Strategy is produced to identify provable properties and architectural constraints, ensuring critical system properties are mathematically verifiable.
Community Sentiment
Positives
- Using LLMs as a software engineer has yielded the best results, emphasizing the importance of proper scoping and documentation in development.
- The approach of iterating rapidly toward a working product remains valuable, especially with LLMs that can assist in exploring what works and what doesn't.
Concerns
- Spec-driven development is fundamentally flawed for AI-first projects, as it assumes prior knowledge that may not exist, making it unreasonable.
- Relying on LLMs for test generation can lead to issues, as they may not understand the implicit context required for effective testing.
