Security & Testing Agent Skills for Codex CLI

Detect and fix testing anti-patterns for better test quality

Invoke whenever writing, changing, reviewing, or sweeping tests.

Use when generating test cases after a solution is verified solvable, designing adversarial tests to break wrong approaches, creating…

Orchestrate parallel test generation for all changed components, jobs, models, policies, and services in the current branch.

Analyze test coverage and suggest tests for uncovered code

Use when test coverage falls below target or a new module has no tests — identifies untested code paths and writes targeted unit or…

Use when testing the Hubble Electron desktop app, especially when inspecting, clicking, screenshotting, or verifying a real note edit in…

Walk one test-driven development cycle (RED then GREEN, optionally Refactor while GREEN).

Designs, implements, and refines automated test suites across multiple frameworks with deterministic isolation and behavior-focused…

Investigates failing tests and routes the issue to the right developer using dependency and history context.

Initialize test framework with Playwright or Cypress.

Performs pseudo-mutation analysis on .NET production code to find gaps in existing test suites.

Detect missing test coverage and generate test suggestions.

Generates test files, creates mocking strategies, analyzes code coverage, designs test architectures, and produces test plans and defect…

Test Planning and Quality Assurance prompt that generates comprehensive test strategies, task breakdowns, and quality validation plans for…

Test a playable browser game end to end with deterministic fixtures and real browser evidence.

Generate test outlines (living documentation) and test code from natural language feature descriptions.

Launch, retain, and test the T3 Code web app in isolated development environments, including first-try browser authentication with…

Guide for testing Codex TUI interactively

Verify working-tree changes against an 8-tier test pyramid.

Generate AscendC testcases that hit intended implementation semantics.