tdd

Test-driven development with red-green-refactor loop. Use when user wants to build features or fix bugs using TDD, mentions "red-green-refactor", wants integration tests, or asks for test-first development.

1.18x

Quality

83%

Does it follow best practices?

Impact

96%

1.18x

Average score across 3 eval scenarios

Securityby

Passed

No findings from the security scan

The canonical home for this skill is tdd in mattpocock/skills

Evaluation results

94%

Discount Engine for Online Store

Vertical slice TDD workflow

Criteria

Baseline

With context

Test before code per cycle

100%

No horizontal slicing

100%

At least 3 cycles documented

100%

Tracer bullet first

100%

Behavior-named tests

100%

Planning step documented

100%

Single assertion per test

50%

40%

Public interface only in tests

100%

No internal mocking

100%

Minimal code per cycle

100%

94%

Invoice Data Parser Library

Deep module interface design

Criteria

Baseline

With context

Small public interface

50%

100%

Functions return values

100%

Tests use public API only

100%

No internal helpers tested

100%

Behavior-named tests

100%

No implementation assertions

100%

Refactor notes present

100%

Tests pass after refactor

30%

40%

Private helpers not re-exported

100%

No side-effect verification

100%

35%

User Onboarding Notification Service

System boundary mocking and dependency injection

Criteria

Baseline

With context

Dependency injection for externals

100%

No internal mocking

100%

System boundary mocks only

100%

SDK-style email mock

100%

SDK-style analytics mock

100%

No call count assertions

100%

No call order assertions

100%

Behavior-focused tests

50%

100%

Tests verify return values

100%

No generic fetch mock

100%

Repository: openstatusHQ/data-table-filters
Path: .agents/skills/tdd/SKILL.md
Commit: f1cbf2f

Evaluated: 5 months ago
Agent: Claude Code
Model: Claude Sonnet 4.6

Table of Contents

Discount Engine for Online Store User Onboarding Notification Service Invoice Data Parser Library

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