How does this skill discover interfaces?

By designing high-level tests first and using Mocks to represent dependencies, the skill identifies the exact methods and signatures required for the components to work together.

What is a tdd-spec.md file?

It is a structured markdown file generated by this skill that maps requirements to specific test cases, edge cases, and verification criteria for implementation.

Does this skill write the actual test code?

This skill focuses on the design and specification phase. The resulting tdd-spec.md can then be used by implementation skills like /tdd-impl to generate the actual code.

What are STRUCT-XXX invariants?

These are structural requirements derived from CLAUDE.md Exports that ensure exported symbols maintain their names, parameter types, and return types across the codebase.

Test Design & TDD Architect

Name: Test Design & TDD Architect
Author: 0pg

by0pg

0•

安全与测试

Designs comprehensive test suites and generates structured TDD specifications using a Top-Down approach to define software interfaces.

This skill streamlines the Test-Driven Development (TDD) process by transforming raw requirements into a structured .claude/tdd-spec.md file. It employs an Outside-In strategy, designing tests from high-level acceptance criteria down to granular unit tests, using Mocks to discover and define necessary interfaces during the design phase. It uniquely integrates with CLAUDE.md to extract structural invariants (STRUCT-XXX), ensuring that exported functions, classes, and types maintain consistent signatures and contracts. This serves as the blueprint for robust, testable software architecture before a single line of implementation code is written.

主要功能

01Requirement Validation: Analyzes inputs for ambiguity and identifies missing information.

02Top-Down Test Orchestration: Designs tests from Acceptance to Unit levels.

030 GitHub stars

04Structural Invariant Extraction: Parses CLAUDE.md Exports to enforce architectural consistency.

05Automated Spec Generation: Creates and updates standardized .claude/tdd-spec.md files.

06Interface Discovery: Uses Mocks to identify required dependencies and method signatures.

使用场景

01Ensuring structural consistency across module exports by mapping them to structural tests.

02Designing a new feature's architecture by defining its test contracts first.

03Creating a roadmap for complex TDD implementations in existing codebases.

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add 0pg/cc-marketplace test-design

For use in Claude.ai and ChatGPT

Download Skill