js-tests-reviewer

js-tests-reviewer is an agent for Claude Code from vladolaru/claude-code-plugins. It costs 33 tokens per session (1,007 once invoked), scanned B, original, MIT.

A review tool for checking JavaScript and TypeScript tests, including tests written with Jest, Vitest, and React Testing Library.

In plain words
What is it for?
Use it to review assertions, screen and interface queries, module mocks, asynchronous tests, and snapshot usage.
Why use it?
It helps find tests that give false confidence because their checks, mocks, asynchronous steps, or snapshots do not properly verify the code.

Agent for Claude Code

Written for Claude Code: effort in frontmatter. Also seen: model in frontmatter; reads .claude/ paths.

Good fit Use it to review assertions, screen and interface queries, module mocks, asynchronous tests, and snapshot usage.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/vladolaru/claude-code-plugins/js-tests-reviewer
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.

Clone the repo
git clone --depth 1 https://github.com/vladolaru/claude-code-plugins

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for js-tests-reviewer

README.md
[![agentmods](https://agentmods.dev/badge/agents/vladolaru/claude-code-plugins/js-tests-reviewer/github.svg)](https://agentmods.dev/agents/vladolaru/claude-code-plugins/js-tests-reviewer)
Your own site
<a href="https://agentmods.dev/agents/vladolaru/claude-code-plugins/js-tests-reviewer"><img src="https://agentmods.dev/badge/agents/vladolaru/claude-code-plugins/js-tests-reviewer/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for js-tests-reviewer

Your own site · 80×15
<a href="https://agentmods.dev/agents/vladolaru/claude-code-plugins/js-tests-reviewer"><img src="https://agentmods.dev/badge/agents/vladolaru/claude-code-plugins/js-tests-reviewer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 33 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,007 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00033 $0.01007
Opus 5.5 $0.00013 $0.00403
Sonnet 5.5 $0.00007 $0.00201
Haiku 4.5 $0.00003 $0.00101

Measured 1mo ago against content hash d0d40e60f017, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade B, and why

js-tests-reviewer scanned grade B with 1 finding 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 1mo 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.

Asks the agent to reveal its instructionsmediumSystem prompt leakage

Directions to print, repeat or translate the system prompt extract configuration the operator did not intend to expose.

If STATUS is NO_DOMAIN_FILES, your not_applicable review is already recorded at the REVIEW path printed; return STATUS: FINISHED without reading the briefing. If STATUS is ERROR, report the error and exit. Otherwise the
plugins/pirategoat-tools/agents/js-tests-reviewer.md · 75 lines

How it starts

The opening of the file, as written. The whole thing — 75 lines — stays where its author put it; the contents beside it link to each section on GitHub.

MANDATORY SETUP — Run Bootstrap Before Reviewing

Do NOT start reviewing code until this step is done:

Run the bootstrap script:

PLUGIN_ROOT=$(cat "${PIRATEGOAT_TOOLS_HOME:-$HOME/.pirategoat-tools}/sessions/$CLAUDE_CODE_SESSION_ID/plugin-root" 2>/dev/null)
[ -z "$PLUGIN_ROOT" ] || [ ! -d "$PLUGIN_ROOT/scripts" ] && PLUGIN_ROOT=$(find ~/.claude -path "*/pirategoat-tools/*/scripts/review/agent/bootstrap.py" -type f 2>/dev/null | sort -V | tail -1 | xargs dirname | xargs dirname | xargs dirname | xargs dirname)
python3 $PLUGIN_ROOT/scripts/review/agent/bootstrap.py --agent js-tests-reviewer

If STATUS is NO_DOMAIN_FILES, your not_applicable review is already recorded at the REVIEW path printed; return STATUS: FINISHED without reading the briefing. If STATUS is ERROR, report the error and exit. Otherwise the output names your briefing file; read it in full. It contains your review rules (including the shared tests protocol), review scope, and output instructions.


You are an expert JavaScript/TypeScript Test Quality Reviewer specializing in Jest, Vitest, and React Testing Library test ecosystems.

Your expertise: Jest/Vitest assertions, React Testing Library query priority, module mocking scope, async testing patterns, snapshot discipline, and JS-specific test anti-patterns.

This review matters. False confidence from bad tests causes production bugs that proper review would have caught.

Core Mission

Verify test quality -> Detect false confidence -> Ensure behavior coverage

Do NOT review implementation code. Do NOT review PHP tests or Playwright E2E tests.

Deep Knowledge References

All reference files are at $PLUGIN_ROOT/skills/testing-patterns/references/.

Test Issue Reference File Sections to Read
Behavior vs implementation test-philosophy.md ## The Fundamental Shift + ## Four Core Principles
Flaky/brittle/slow tests test-smells.md ## The Six Major Test Smells (relevant subsection)
Mock usage decisions mocking-strategies.md ## The Mocking Decision Framework + ## Types of Test Doubles
AAA pattern/naming test-structure.md ## The AAA Pattern + ## Test Naming Conventions
Jest/Vitest patterns jest-vitest-patterns.md Full file (~422L, manageable)

Read the full file on GitHub · 75 lines

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. 1mo ago Changed d0d40e60f017
  2. 1mo ago Changed 590fc00284c2
  3. 1mo ago Changed 15bb40ede96b
  4. 1mo ago First seen · 75 lines · 33 tokens per session scan B e5836263e5c5

Subscribe to this mod's changes

js-tests-reviewer is an agent published in the GitHub repository vladolaru/claude-code-plugins (8 stars, last pushed 15d ago), licensed MIT. It adds 33 tokens to every session and 1,007 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it B with 1 finding (asks the agent to reveal its instructions). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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