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Sokoliem
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test-harden

Identify missing behavior contracts and author targeted tests for regression coverage.

Updated Aug 23, 2026
Search Tags:#testing#quality#regression#coverage#test#boundaries#behavior-contracts
One-click install
npx skills add https://github.com/Sokoliem/ultraprompt --skill test-harden
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: test-harden
Source: https://github.com/Sokoliem/ultraprompt/tree/main/skills/test-harden
Command: npx skills add https://github.com/Sokoliem/ultraprompt --skill test-harden

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Disciplined guides testers to write tests with explicit behavior contracts, increasing reliability, safety, and long-term maintainability of software.

Core Features & Use Cases

  • Behavior contracts: codify expected inputs, outputs, and side effects to pin observable behavior.
  • Boundary and resilience tests: encourage tests for empty, max, error, and concurrent scenarios.
  • Guarded testing workflow: discourages change-detector tests and promotes durable regression coverage.
  • Use Case: when evolving a feature, generate tests that lock in contracts and prevent regressions.

Quick Start

Identify missing behavior contracts and add targeted tests that cover boundaries, using the test-strategist to plan and validate coverage.

Frequently Asked Questions about test-harden

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
What are behavior contracts in testing and how do they prevent regressions?▼

Behavior contracts codify expected inputs, outputs, and side effects to pin observable behavior, ensuring durable regression protection by locking in specific software functionality during feature evolution.

How do I write tests that cover boundary and edge-case scenarios?▼

To write tests for boundary and edge-case scenarios, author targeted tests that validate empty, max, error, and concurrent conditions, strengthening coverage by codifying resilience behavior within your test workflow.

Why do I have change-detector tests and how can I make my regression coverage more durable?▼

Change-detector tests reduce reliability by failing on any modification rather than validating behavior. Discourage them by authoring targeted tests with explicit behavior contracts to ensure durable regression coverage.

What's the best way to identify missing test coverage for evolving features?▼

The best way to identify missing test coverage is to analyze applicable unit, integration, and edge-case scenarios, then author targeted tests to strengthen coverage and codify missing behavior contracts.

How do I plan and validate my test strategy to ensure durable coverage?▼

Plan and validate your test strategy by using a guarded testing workflow to identify missing behavior contracts, author targeted tests, and ensure contracts are codified and validated for durable coverage.

When should I use behavior contracts instead of standard unit tests?▼

Use behavior contracts instead of standard unit tests when evolving a feature, to generate tests that explicitly lock in contracts, pin observable behavior, and prevent future regressions safely.

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