Review test suite quality against engineering best practices

This skill runs a test quality review that diagnoses structural problems in an existing test suite - brittleness, mock overuse, and other test-space decay risks - drawing primarily on xUnit Test Patterns, The Art of Unit Testing, How Google Tests Software, and Working Effectively with Legacy Code, among twelve classic engineering books referenced in shared framework files covering the Iron Law and Health Score rules, book-level source coverage, and test-specific symptom definitions and attributions, plus its own test guide defining the review framework. If the user hasn't shared test files or pointed to a test directory, it applies its own automatic scope detection to determine the review scope first.

Use it when reviewing the structural quality of an existing test suite specifically - not general code review, which belongs to the sibling PR-review skill instead.

Given test files or an auto-detected scope, it builds a test suite map, scans for each test decay risk in a specified order, applies the Iron Law to every finding, and outputs a report following the shared report template, labeled Test Quality Review as its report mode.

Depends on companion reference files in a shared folder defining the Iron Law and Health Score rules, source coverage, and test-decay-risk symptom definitions, plus this skill's own test guide defining the test suite map and review steps.

Developers and QA engineers who want a structured, book-grounded assessment of test suite health - brittleness, mock overuse, and other structural test smells - rather than a raw coverage-percentage check.