wio

Skills to find unknown bugs before release!

We help your agents test edge cases in your software where rare production bugs hide.

Most AI-written tests optimize for coverage. They assert implementation details, mock away the real risk, and pass even when the product breaks. @workersio/skills gives coding agents a testing workflow that asks a stricter question: will this test catch a real regression that users, operators, reviewers, or maintainers care about?

@workersio/skills is one skill with five command modes:

$wio scan      # Find high-value tests to add next.
$wio test      # Run candidate discovery, strategy, implementation, and review.
$wio workload  # Generate realistic, replayable workloads with new bug-finding value.
$wio review    # Judge whether a test should be kept, redone, or removed.
$wio doctor    # Audit suite health, weak assertions, flakes, mocks, and CI blind spots.

Works With

           

@workersio/skills is packaged for Codex and Claude Code today. The core skill content is plain Markdown, so the testing workflow can also be adapted by other coding agents that support project skills, instructions, or reusable prompts.

Install

Direct skill install:

npx skills add workersio/skills

Codex plugin marketplace:

codex plugin marketplace add workersio/skills

Claude Code plugin marketplace:

claude plugin marketplace add workersio/skills
claude plugin install wio@workersio-skills

For local Codex plugin testing from this checkout:

codex plugin marketplace add .

What It Provides

Area	What the agent gets
Test discovery	Maps product behavior, recent changes, existing tests, CI, and risk areas before choosing what to test.
Strategy selection	Chooses the right level: unit, component, integration, contract, E2E, workload, fuzz, property, mutation, resilience, or monitoring.
Test writing	Adds focused tests using the repository's own framework, naming, fixtures, helpers, and runner conventions.
Workload generation	Creates realistic, adversarial, seeded, replayable sessions or traffic that add coverage beyond wrappers and parameter sweeps.
Test review	Applies a strict value gate: KEEP, REDO, or REMOVE. Coverage alone is not enough.
Suite health	Finds weak assertions, over-mocking, broad snapshots, flakes, skipped tests, slow feedback loops, and CI blind spots.

Command Guide

Command	Use it when	Example
$wio scan [target]	You do not yet know what to test.	$wio scan checkout
$wio test [target]	You want the full write-and-review loop.	$wio test billing eligibility regression
$wio workload [target]	The risk lives in realistic user, API, CLI, job, or load behavior.	$wio workload onboarding session
$wio review [target]	A test exists and you need to decide whether it has real value.	$wio review tests/billing_eligibility_test.py
$wio doctor [target]	The suite is hard to trust or maintain.	$wio doctor API test suite

Quality Bar

An approved test should answer: