Update Code-Spec - Capture Executable Contracts

To capture bug fixes into executable code contracts, you generate a seven-section spec covering scope, signatures, request/response contracts, validation matrices, test requirements, and wrong-vs-correct examples. This ensures implementation knowledge is durable and verifiable.

An executable code-spec document for API signature updates is a durable contract containing concrete payload fields, validation rules, error behavior matrices, and testable assertions. It translates post-task learnings into verifiable institutional memory for future development.

You need to update code-specs with cross-layer contract changes whenever modifications affect commands, API signatures, database schema migrations, or infrastructure integrations. This enforces contract-first rigor and prevents valuable design decisions from being lost.

To document validation and error behavior matrices, define good, base, and bad cases alongside required tests with specific assertion points. Include at least one wrong-vs-correct example so future developers and AI can implement safely and consistently.

Yes, this code-spec format works for database schema migrations and infra integrations by applying contract-first rigor. It captures environment contracts and validation rules into a structured seven-section document suitable for cross-layer changes.