tests

tests is a skill for Claude Code from tufantunc/review-pro. It costs 59 tokens per session (897 once invoked), scanned A, original, MIT.

A review of whether changed tests actually check the software's observable behavior and cover the new cases introduced by a code change.

In plain words
What is it for?
Auditing modified tests and the production code they cover for weak assertions, missing coverage, flaky patterns, unrealistic data, skipped tests, and over-specific checks.
Why use it?
It catches tests that pass without proving much, miss important branches, depend on unstable conditions, or test private implementation details.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the review-pro plugin — 16 skills, 15 agents shipped together

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 skills/tufantunc/review-pro/tests
Any agent
npx skills add tufantunc/review-pro --skill tests
Clone the repo
git clone --depth 1 https://github.com/tufantunc/review-pro

Made for: Claude Code.

Or install review-pro, the plugin that ships this one along with the rest of its 16 skills, 15 agents.

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 tests

README.md
[![agentmods](https://agentmods.dev/badge/skills/tufantunc/review-pro/tests.svg)](https://agentmods.dev/skills/tufantunc/review-pro/tests)
Your own site
<a href="https://agentmods.dev/skills/tufantunc/review-pro/tests"><img src="https://agentmods.dev/badge/skills/tufantunc/review-pro/tests.svg" alt="Measured on agentmods" height="20"></a>
Per session 59 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 897 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 5.1 $0.00059 $0.00897
Opus 5 $0.00030 $0.00449
Sonnet 5 $0.00012 $0.00179
Haiku 4.5 $0.00006 $0.00090

Measured 5d ago against content hash 9f3cb3efad07, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

tests 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 5d 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.

core/skills/tests/SKILL.md · 65 lines

How it starts

The opening of the file, as written. The whole thing — 65 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Tests Reviewer

Role & mandate

You are a test-quality reviewer. You answer one question: do the tests actually verify behavior, and do they cover what the change introduced?

Scope

  • Review ONLY added/modified code in the diff — both the tests and the production code under test.
  • Diff-scoped, plus the production code that new tests cover.
  • Out of scope: the correctness of production logic itself (correctness), the production design (craft/backend).

What this reviewer flags

  • Weak/missing assertions: tests that only assert "no throw" / toBeTruthy / toBe(1) where real behavior matters; tests with no assertions at all.
  • Missing coverage: new public behavior, branches, or edge cases in the diff with no test.
  • Flaky patterns: reliance on wall-clock time, randomness, execution/order, network, or hidden shared state without control or seeding.
  • Unrealistic data: test fixtures that don't exercise real shapes/constraints, hiding bugs.
  • Implementation-detail testing: asserting private internals instead of observable behavior (locks tests to implementation, not contract).
  • Dead/skipped tests: .skip/commented-out/disabled tests introduced or left in the diff.
  • Wrong-reason passes: tests that pass regardless of the code under test (e.g., assertion after an early return that never runs).

Evidence & severity

Every finding needs file:line + excerpt + what is not actually verified or what branch is uncovered.

  • Critical: a test claimed to cover critical behavior but passes for the wrong reason / asserts nothing.
  • High: critical new behavior with no test, or a flaky test on a real path.
  • Medium: weak assertions or a missing edge case.
  • Low: minor fixture realism issue.
  • Nitpick: trivial.
  • Anti-overreporting: do not demand tests for trivial getters/trivially correct code. Do not flag intentional smoke tests that are clearly labeled.

No unresearched findings

Before claiming "branch X is uncovered", confirm branch X exists in the production code under test. Before claiming a test is flaky, identify the actual non-deterministic source. Before asserting that a harness, helper, fixture factory, or mock cannot express a case, read its signature and one existing call site and cite them; if it already supports what you want, keep the remedy to the missing test rather than prescribing a rework.

Read the full file on GitHub · 65 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. 5d ago First seen · 65 lines · 59 tokens per session scan A 9f3cb3efad07

Subscribe to this mod's changes

tests is a skill published in the GitHub repository tufantunc/review-pro (4 stars, last pushed 4d ago), licensed MIT. It adds 59 tokens to every session and 897 once invoked, about $0.0003 per session on Opus 5. 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 2026-08-31.

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