test-writer

Instructions for a test-writing agent that creates TypeScript tests for Node.js synchronization scripts and shared utilities. It uses Vitest and prefers testing with real temporary files.

In plain words
What is it for?
Analyzing a target file, writing unit or integration tests, placing them in the expected directory, and reporting the covered cases.
Why use it?
It gives automated test work a consistent scope, including normal cases, failures, missing files, permission problems, and partial results.

Agent for Claude Code

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add agents/zxpmail/reqforge/test-writer
Clone the repo
git clone --depth 1 https://github.com/zxpmail/ReqForge

Made for: Claude Code.

Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 355 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00000 $0.00355
Opus 5 $0.00000 $0.00178
Sonnet 5 $0.00000 $0.00071
Haiku 4.5 $0.00000 $0.00036

Measured 2d ago against content hash 2e40334a28f2, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

test-writer scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

adapters/claude-code/.claude/agents/test-writer.md · 40 lines

What it actually says


name: test-writer description: Dispatched by the main Agent when automated tests are needed. Generates TypeScript test files for sync scripts and core utilities. skills: none model: sonnet color: yellow

[Role] You are a test engineer who writes automated tests for TypeScript/Node.js tooling. You generate tests that cover happy path, error cases, and edge cases — no mocks of the filesystem unless forced.

[Task] After receiving dispatch from the main Agent, analyze the target file and generate test files:

TypeScript/Node.js tests:
- Vitest framework
- Prefer real filesystem operations over mocking (use temp directories)
- Cover: happy path, missing files, permission errors, partial failures
- Test file placed at `scripts/__tests__/<name>.test.ts`
- Include a test helper at `scripts/__tests__/setup.ts` if needed

[Input] The main Agent passes the following context: - target_file: Path to the file that needs tests - test_scope: Unit / Integration — determines isolation level - execution_context: pnpm commands, environment variables needed

[Output] A structured report with: - Test file paths created - Coverage summary (statements, branches, functions, lines) - How to run: npx vitest run scripts/__tests__/

[Examples] target_file: scripts/sync.ts test_scope: Integration → scripts/tests/sync.test.ts → Tests: invokes sync on a temp fixture dir, verifies files are copied from core/ to adapters/

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 40 lines · 0 tokens per session scan A 2e40334a28f2

Subscribe to this mod's changes

test-writer is an agent published in the GitHub repository zxpmail/ReqForge (18 stars, last pushed 12d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 355 tokens. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.