Design-by-Contract (DbC) Developer

About

This skill implements the Design-by-Contract (DbC) methodology within Claude Code, providing a structured workflow to define and verify software component behaviors. It guides developers through planning contract predicates, generating language-specific annotations (supporting Rust, TypeScript, Python, Java, and C++), and automating the verification process to detect violations early. By following a strict hierarchy that prioritizes static assertions over runtime checks, it ensures high-performance, self-documenting code that fails safely at the point of error rather than allowing logic bugs to propagate.

Key Features

• Verification hierarchy that optimizes performance by prioritizing compile-time checks.
• Multi-language support for Rust, TypeScript/Zod, Python/icontract, Java, and C++.
• Standardized remediation strategies for precondition, postcondition, and invariant violations.
• 0 GitHub stars
• Automated detection of existing contract patterns and identification of coverage gaps.
• Structured 4-phase workflow covering planning, creation, verification, and remediation.

Use Cases

• Ensuring internal state consistency in complex business logic and safety-critical systems.
• Defining robust boundaries for public APIs to prevent invalid data entry.
• Formalizing technical requirements into executable code documentation for team collaboration.