writing-test-plans

Testing & Quality

Creates risk-based test plans and strategies. Use when planning testing, defining test scope, or documenting QA approach.

QUICK START

How to use this skill

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Review the proposed files and risks before you approve installation.

Prompt to paste

I want to install this Agent Skill for this project in Codex.

Source SKILL.md: https://github.com/majiayu000/claude-skill-registry/blob/HEAD/skills/testing/writing-test-plans/SKILL.md

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First, summarize what it does, its dependencies, license status if identifiable, and any risks. Show the exact files you propose to add under .agents/skills/writing-test-plans/. Do not write files or run scripts until I approve.

After I approve, install the complete skill folder, including required referenced files, into that project location. Verify it is discoverable, then tell me its actual invocation name and how to use it. Do not claim it is installed until you have verified it.

Copying this prompt does not install or run the skill. Review third-party files before use. Codex skill guide

Test Plan Writing

Create practical, risk-based test plans.

Right-Size the Plan

Small feature: One-page plan (scope, risks, approach). Large feature: Full plan with all sections. Ask "Does the reader need this?" for every section.

Risk-Based Prioritization

Risk/Impact	High Impact	Low Impact
High Risk	Test thoroughly	Test defensively
Low Risk	Test key paths	Minimal testing

Test Pyramid

        /  E2E  \        Few, slow, expensive
       /  Integ. \       Some, moderate
      /   Unit    \      Many, fast, cheap

Required Sections

Overview - Feature under test, objectives, link to spec
Scope - In scope (what tested), Out of scope (what not, and why)
Test Strategy - Test types, approach per component, automation decisions
Risk Assessment - Identified risks, severity, mitigation, attention areas
Test Cases - Organized by feature, priority (P0/P1/P2), happy path and edge cases
Environment & Data - Test environments, data requirements, dependencies
Entry/Exit Criteria - When testing starts, when testing is complete

Test Case Format

### TC-001: [Description]

**Priority**: P0 | P1 | P2
**Type**: Unit | Integration | E2E | Manual

**Preconditions**:
- [Required state]

**Steps**:
1. [Action]

**Expected Result**:
- [Outcome]

**Edge Cases**:
- [Variations]

Priority Definitions

Priority	Description	Coverage
P0	Critical path, must work	100% automated
P1	Important functionality	Mostly automated
P2	Edge cases	Manual or deferred

Test Types

Type	Purpose	When
Unit	Isolated functions	Business logic, utilities
Integration	Component interactions	APIs, database, services
E2E	Complete user flows	Critical journeys
Manual	Exploratory, UX	Complex UI, accessibility

Guidelines

Link tests to requirements. Prefer automation. Test behavior, not implementation. Keep tests simple.

Anti-Patterns

Do not test implementation details. Do not target 100% coverage as a goal. Do not create flaky tests. Do not rely on specific timing or order. Do not mock everything.

Template

Use templates/test-plan.md for new plans.