Move testing activities earlier in the development lifecycle to catch defects when they're cheapest to fix. Use when implementing TDD, CI/CD, or early quality practices.
Install with Codex or Claude Copy this prompt, paste it into Codex, Claude, or another assistant, and let it review the skill page and install it for you.
A direct command skips the review prompt. Inspect the source before running it.
Move testing activities earlier in the development lifecycle to catch defects when they're cheapest to fix. Use when implementing TDD, CI/CD, or early quality practices.
# CI pipeline - tests run on every commitname:CIon: [push, pull_request]
jobs:test:runs-on:ubuntu-lateststeps:-uses:actions/checkout@v4-run:npmci-run:npmruntest:unit-run:npmruntest:integration-run:npmrunlintquality-gate:needs:teststeps:-name:CoverageCheckrun:npxcoverage-check--min80-name:NoNewWarningsrun:npmrunlint----max-warnings0
Level 2: TDD Practice
// Red: Write failing test firsttest('calculates discount for orders over $100', () => {
const order = newOrder([{ price: 150 }]);
expect(order.discount).toBe(15); // 10% off
});
// Green: Minimal implementationclassOrder {
getdiscount() {
returnthis.total > 100 ? this.total * 0.1 : 0;
}
}
// Refactor: Improve while keeping green
Level 3: BDD in Refinement
# Example mapping before coding
Feature: Loyalty Discount
Scenario: Gold member gets 15% discount
Given a customer with "gold" membership
When they checkout with $200 in cart
Then discount applied is $30
And order total is $170
Scenario: New customer gets no discount
Given a customer with no membership
When they checkout with $200 in cart
Then no discount is applied
Level 4: Risk Analysis in Design
// During architecture reviewawaitTask("Risk Analysis", {
phase: 'design',
component: 'payment-service',
questions: [
'What happens when payment gateway times out?',
'How do we handle duplicate submissions?',
'What if inventory changed during checkout?'
]
}, "qe-requirements-validator");
// Output: Testability requirements, failure mode tests
Earlier = Cheaper. Requirements defects cost 1x; production defects cost 100x. Test pyramid: 70% unit, 20% integration, 10% E2E. Every commit runs tests. TDD builds quality in.
With Agents: Agents validate requirements testability, generate tests from specs, and select optimal regression suites. Use agents to implement shift-left practices consistently.
