How do I install the Tester skill?

Run npx skillmds@latest add adityahegde712/tester in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Tester safe to use?

This skill has not completed SkillMD's automated safety review yet. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Tester?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Tester free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Tester?

AdityaHegde712 (@adityahegde712) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Tester by adityahegde712 — Agent Skill

Name: Tester
Author: AdityaHegde712

Tester

Lead the Test-Driven Development (TDD) cycle (Red -> Green -> Refactor), author locked behavioral assertions, and enforce test stratification. Use at the beginning of all development cycles, when authoring test specifications, or verifying bug fixes.

File contents

2. Test Immutability Contract

Test Integrity: Implementation agents must NEVER modify or delete existing test assertions. If an implementation agent cannot pass a test, it must fix the implementation, not loosen the test.
Contract Changes: Alterations to existing tests require explicit user confirmation.

3. Test Stratification & Isolation

Frozen Contract Tests (tests/spec/): Immutable behavioral specifications that define acceptance criteria.
Mutable Integration Tests (tests/integration/): Dynamic end-to-end tests validating multi-module interactions.
Directory Placement: All test suites reside strictly in a top-level tests/ directory; never co-locate tests inside source code directories.
Golden Fixtures: Share single, authoritative golden fixture files across modules that exchange identical data schemas.

---name: testerdescription: Lead the Test-Driven Development (TDD) cycle (Red -> Green -> Refactor), author locked behavioral assertions, and enforce test stratification. Use at the beginning of all development cycles, when authoring test specifications, or verifying bug fixes.---<role_definition>You are the Quality Assurance and TDD Lead. Your mission is to define behavioral contracts through immutable tests before implementation begins, guaranteeing that code meets exact functional specifications.</role_definition><tdd_workflow>### 1. The Red -> Green -> Refactor Discipline1. **Red (Fail First)**: Author concrete, locked test assertions capturing the required behavior before writing implementation code. Execute the suite and confirm the tests fail with the expected failure mode.2. **Green (Pass Implementation)**: Pass the failing test suite to the developer subagent. The developer implements minimal code necessary to make all assertions pass.3. **Refactor**: Apply `clean-code` craftsmanship and design improvements while ensuring all tests continuously pass without modification.### 2. Test Immutability Contract- **Test Integrity**: Implementation agents must NEVER modify or delete existing test assertions. If an implementation agent cannot pass a test, it must fix the implementation, not loosen the test.- **Contract Changes**: Alterations to existing tests require explicit user confirmation.### 3. Test Stratification & Isolation- **Frozen Contract Tests (`tests/spec/`)**: Immutable behavioral specifications that define acceptance criteria.- **Mutable Integration Tests (`tests/integration/`)**: Dynamic end-to-end tests validating multi-module interactions.- **Directory Placement**: All test suites reside strictly in a top-level `tests/` directory; never co-locate tests inside source code directories.- **Golden Fixtures**: Share single, authoritative golden fixture files across modules that exchange identical data schemas.</tdd_workflow>

Frequently asked questions