TDD Loop Master
Enforce strict Red-Green-Refactor discipline to build robust, test-driven software with 100% meaningful coverage.
- Generate a prioritized test list for new features before writing code.
- Audit existing tests for tautologies and missing failure modes.
- Enforce minimum-viable-code patterns to prevent over-engineering.
Free
Sample input
I need to build a simple password validator in Python using PyTest. Let's start the TDD process.
Sample output
Phase 1: Test List
- Empty string returns False (Degenerate)
- String < 8 chars returns False (Boundary)
- No special char returns False
- Valid input returns True
Step 1: RED
def test_empty_string_is_invalid():
assert validate_password("") is False
(Fails: NameError)
Enforce strict Red-Green-Refactor discipline to build robust, test-driven software with 100% meaningful coverage.
Free
Included in download
- Downloadable skill package
- Instant install
Sample input
I need to build a simple password validator in Python using PyTest. Let's start the TDD process.
Sample output
Phase 1: Test List
- Empty string returns False (Degenerate)
- String < 8 chars returns False (Boundary)
- No special char returns False
- Valid input returns True
Step 1: RED
def test_empty_string_is_invalid():
assert validate_password("") is False
(Fails: NameError)
About This Skill
Master the Red-Green-Refactor Cycle
Most AI agents write code first and tests later, leading to fragile architectures and "tautological" tests that can't actually fail. TDD Loop Master enforces a strict, disciplined Test-Driven Development workflow that ensures your software design is driven by requirements, not implementation details.
What it does
This skill guides you through a rigorous TDD cycle for any feature or bug fix. It starts by generating a comprehensive "Test List" from the simplest degenerate cases to complex edge cases. It then methodically steps through the Red-Green-Refactor loop, preventing you from writing a single line of production code until a failing test exists.
- Strict Red Phase: Generates a specific, failing test case tailored to your stack.
- Green Phase: Forces the "minimum viable code" to pass the test, preventing over-engineering.
- Refactor Control: Only allows architectural improvements once the suite is green.
- Mocking Guardrails: Audits your mocks to ensure they aren't hiding bugs or creating false positives.
Why use this skill?
Standard prompting often produces broad code blocks that are hard to debug. This skill break tasks into atomic, verifiable steps. It supports all major frameworks (Jest, PyTest, JUnit, Go Test, etc.) and is ideal for developers who want robust, self-documenting codebases with near-100% meaningful coverage.
Use Cases
- Generate a prioritized test list for new features before writing code.
- Audit existing tests for tautologies and missing failure modes.
- Enforce minimum-viable-code patterns to prevent over-engineering.
- Design testable interfaces using triangulation and fake-it strategies.
Known Limitations
- Focuses on unit and integration logic, not E2E visual regression.
- Requires user to have a local test runner configured.
- Best for logic-heavy features over pure UI styling.
How to Install
mkdir -p ~/.claude/skills && curl -sL https://www.agensi.io/api/install/tdd-loop-master -o /tmp/tdd-loop-master.zip && unzip -o /tmp/tdd-loop-master.zip -d ~/.claude/skills && rm /tmp/tdd-loop-master.zipFree skills install directly. Paid skills require purchase - use the download button above after buying.
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Security Scanned
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Permissions
No special permissions declared or detected
Compatible with SKILL.md-compatible agents like Claude Code and Cursor.
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