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principle-test-behavior-not-implementation

by pstack-claude

Apply when you write, change, or keep a test. Identify a relevant defect and check that the test detects it. Assert the required result or observable effect, including absence when the contract requires it.

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Install this skill

Run this command in your terminal. No account required — it auto-detects your AI tool and installs the skill file.

npx @skills-hub-ai/cli install pstack-claude-principle-test-behavior-not-implementation
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Setup by platform

Claude Code

~/.claude/skills/<skill>/SKILL.md

Setup guide →

Install

One-click setup for your editor

Run in your project root

npx @skills-hub-ai/cli install pstack-claude-principle-test-behavior-not-implementation --target claude-code
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Frequently asked questions about principle-test-behavior-not-implementation

What does the principle-test-behavior-not-implementation skill do?

Apply when you write, change, or keep a test. Identify a relevant defect and check that the test detects it. Assert the required result or observable effect, including absence when the contract requires it. It's a reusable SKILL.md instruction set that loads into your AI coding assistant on demand, no prompt engineering, no copy-pasting every session.

How do I install the principle-test-behavior-not-implementation skill?

Run `npx @skills-hub-ai/cli install pstack-claude-principle-test-behavior-not-implementation` from your terminal. The CLI writes the SKILL.md to the correct location for your AI tool (e.g. ~/.claude/skills/pstack-claude-principle-test-behavior-not-implementation/ for Claude Code or ~/.cursor/skills/ for Cursor with --target cursor) and adds it to your project's .skills.json lockfile.

Which AI tools does principle-test-behavior-not-implementation work with?

principle-test-behavior-not-implementation runs in Claude Code. It follows the open Agent Skills standard (SKILL.md), so the same skill works in every supported tool without modification.

Is the principle-test-behavior-not-implementation skill free?

Yes. Every skill on skills-hub.ai is free and open-source. There are no premium tiers, paywalls, or usage limits. You only pay for whatever AI assistant you're already using.

How do I use principle-test-behavior-not-implementation after installing it?

In Claude Code, type `/pstack-claude-principle-test-behavior-not-implementation` (or whatever slash command the skill registers) and the AI follows the skill's instructions immediately. You can also reference it by name in natural language, your AI loads the skill into context when relevant.

Can I share the principle-test-behavior-not-implementation skill with my team?

Yes. Commit your project's .skills.json lockfile and teammates run `npx @skills-hub-ai/cli install` (no args) to install every skill at the exact version you pinned. Organization-scoped installs work via skills-hub.ai organizations.