mcpnuke-tests

mcpnuke-tests is a cursor rule for Cursor from babywyrm/mcpnuke. It costs 0 tokens per session (499 once invoked), scanned A, original, MIT.

A set of testing rules for the mcpnuke project that requires test-driven development (TDD): write a failing test, make it pass with the smallest change, then clean up the code.

In plain words
What is it for?
Writing tests for mcpnuke checks, verifying that findings appear when expected and stay absent for safe inputs, and confirming that each check records timing information.
Why use it?
It prevents implementation code from being written without a test and makes expected scanner behaviour explicit. It also checks both detected and clean cases, plus timing records.

Cursor rule for Cursor

Written for Cursor: installed under .cursor/.

Good fit Writing tests for mcpnuke checks, verifying that findings appear when expected and…

Compare 6 cursor rules from other repositories ↓
Install with agentmods
npx agentmods add rules/babywyrm/mcpnuke/mcpnuke-tests
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/babywyrm/mcpnuke

Made for: Cursor.

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 mcpnuke-tests

README.md
[![agentmods](https://agentmods.dev/badge/rules/babywyrm/mcpnuke/mcpnuke-tests.svg)](https://agentmods.dev/rules/babywyrm/mcpnuke/mcpnuke-tests)
Your own site
<a href="https://agentmods.dev/rules/babywyrm/mcpnuke/mcpnuke-tests"><img src="https://agentmods.dev/badge/rules/babywyrm/mcpnuke/mcpnuke-tests.svg" alt="Measured on agentmods" height="20"></a>
Per session 0 Nothing until a file matches its globs; then the whole rule loads.
When invoked 499 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. 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 $0.00000 $0.00499
Opus 5 $0.00000 $0.00249
Sonnet 5 $0.00000 $0.00100
Haiku 4.5 $0.00000 $0.00050

Measured 6d ago against content hash 514445fa84a5, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

mcpnuke-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 6d 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.

.cursor/rules/mcpnuke-tests.mdc · 59 lines

What it actually says

mcpnuke Test Conventions

TDD Workflow (superpowers: test-driven-development)

  1. RED — Write the failing test first. Run it. Watch it fail.
  2. GREEN — Write the minimal code to make it pass. Run it. Watch it pass.
  3. REFACTOR — Clean up. Run tests again. Still green.

Never write implementation before the test exists.

Test Structure

"""Tests for <check_name>."""
from mcpnuke.core.models import TargetResult
from mcpnuke.checks.<module> import check_<name>


def test_<name>_positive(result_with_tools):
    r = result_with_tools([{"name": "vuln_tool", "description": "...", "inputSchema": {}}])
    check_<name>(r)
    assert any(f.check == "<name>" for f in r.findings)


def test_<name>_clean(result_with_tools):
    r = result_with_tools([{"name": "safe_tool", "description": "Nothing here", "inputSchema": {}}])
    check_<name>(r)
    assert not any(f.check == "<name>" for f in r.findings)


def test_<name>_timing(result_with_tools):
    r = result_with_tools([{"name": "x", "description": "y", "inputSchema": {}}])
    check_<name>(r)
    assert "<name>" in r.timings

Running Tests

uv run pytest tests/ -v              # Full suite
uv run pytest tests/test_foo.py -v   # Single file
uv run pytest tests/ -v -x           # Stop on first failure

Verification (superpowers: verification-before-completion)

Before claiming work is done, run and confirm:

  • uv run pytest tests/ -v — 1040+ passed, 37 skipped, 0 failed
  • uv run ruff check . — zero findings, and uv run mypy mcpnuke/ at or below the ceiling in .github/workflows/tests.yml
  • No import errors or deprecation warnings
  • New tests cover positive, negative, and timing
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. 6d ago First seen · 59 lines · 0 tokens per session scan A 514445fa84a5

Subscribe to this mod's changes

mcpnuke-tests is a cursor rule published in the GitHub repository babywyrm/mcpnuke (2 stars, last pushed 2d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 499 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 2026-08-31.