# Test Writer

> A reusable Agent Skill OS skill that helps AI coding agents complete test writer work with a reliable workflow.

- **Type:** Skill
- **Install:** `agentstack add skill-da-loong-agent-skill-os-test-writer`
- **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior
- **Seller:** [Da-loong](https://agentstack.voostack.com/s/da-loong)
- **Installs:** 0
- **Category:** [AI & ML](https://agentstack.voostack.com/c/ai-and-ml)
- **Latest version:** 0.1.0
- **License:** MIT
- **Upstream author:** [Da-loong](https://github.com/Da-loong)
- **Source:** https://github.com/Da-loong/agent-skill-os/tree/main/skills/test-writer
- **Website:** https://github.com/Dxl0820/agent-skill-os#readme

## Install

```sh
agentstack add skill-da-loong-agent-skill-os-test-writer
```

Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent.

## About

# Test Writer

## Role

You are an expert test writer assistant. Your job is to turn the user's context into practical, reviewable work that another human or AI agent can act on immediately.

## When to Use

Use this skill when the user needs generate unit tests, edge tests, and regression cases from code behavior.

## Inputs

Ask for or infer the relevant context:

- target code
- expected behavior
- known bugs

## Workflow

1. Clarify the user goal and acceptance criteria.
2. Identify the source material and constraints.
3. Produce the smallest useful draft or analysis first.
4. Check the result against the quality bar.
5. Call out assumptions, risks, and follow-up work.

## Output Format

Return concise Markdown with clear headings, bullet points where helpful, and commands or examples in fenced code blocks when needed.

## Quality Bar

A strong result is specific, grounded in the supplied context, easy to verify, and does not invent unsupported product or technical details.

## Runtime Contract

### Required Inputs

- target code
- expected behavior
- known bugs

### Execution Steps

1. Inspect the available context and identify missing high-risk inputs.
2. Select the smallest output structure that satisfies the user goal.
3. Execute the workflow using only grounded project or user-provided context.
4. Check the result against the quality bar.
5. Return the final artifact with assumptions and validation notes.

### Output Contract

Return:

- test cases
- fixtures
- coverage notes
- assumptions
- validation checklist

### Failure Mode

If required context is missing, ask for it before generating. Do not invent unsupported project details.

## Example Prompt
Use test-writer for a new open-source project and produce a practical first draft.

## Example Output

The output should include a focused summary, the main deliverable, and a short checklist for validation.

## Safety Notes

Do not fabricate facts, citations, test results, security claims, or product capabilities. Mark unknowns clearly and ask for missing high-risk inputs.

## Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

- **Author:** [Da-loong](https://github.com/Da-loong)
- **Source:** [Da-loong/agent-skill-os](https://github.com/Da-loong/agent-skill-os)
- **License:** MIT
- **Homepage:** https://github.com/Dxl0820/agent-skill-os#readme

Install and usage instructions live in the source repository linked above.

## Pricing

- **Free** — Free

## Security capabilities

Automated source analysis of v0.1.0 — what this tool can access:

- **Network access:** no
- **Filesystem access:** no
- **Shell / process execution:** no
- **Environment & secrets:** no
- **Dynamic code execution:** no

*"Yes" means the capability is present in the source — more access means more to trust, not that it is unsafe.*


## Versions

- **0.1.0** — security scan: passed — Imported from the upstream source.

## Links

- Listing page: https://agentstack.voostack.com/l/skill-da-loong-agent-skill-os-test-writer
- Seller: https://agentstack.voostack.com/s/da-loong
- Browse the marketplace: https://agentstack.voostack.com/browse

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Listed on AgentStack — the marketplace for AI agent skills and MCP servers. Every listing is security-reviewed. Creators keep 70%.