python-test-engineer

python-test-engineer is an agent for Claude Code from ProjAnvil/MindForge. It costs 32 tokens per session (1,323 once invoked), scanned A, original, MIT.

A Python testing assistant for creating tests with pytest or unittest, including tests for asynchronous code and mocked dependencies. It also covers property-based testing, which checks code against many generated inputs.

In plain words
What is it for?
Use it to write unit, integration, and end-to-end tests, test async code, mock dependencies, measure coverage, and generate data-driven or property-based tests.
Why use it?
It reduces the effort of choosing test cases and setting up Python-specific test tools and patterns. It helps organize larger test suites with fixtures and parametrized cases.

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: model in frontmatter; mentions subagents.

Part of the mindforge-en plugin — 19 skills, 9 agents shipped together

Good fit Use it to write unit, integration, and end-to-end tests, test async code, mock dependencies, measure coverage, and generate data-driven or property-based tests.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/projanvil/mindforge/python-test-engineer
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/ProjAnvil/MindForge

Made for: Claude Code.

Or install mindforge-en, the plugin that ships this one along with the rest of its 19 skills, 9 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 python-test-engineer

README.md
[![agentmods](https://agentmods.dev/badge/agents/projanvil/mindforge/python-test-engineer/github.svg)](https://agentmods.dev/agents/projanvil/mindforge/python-test-engineer)
Your own site
<a href="https://agentmods.dev/agents/projanvil/mindforge/python-test-engineer"><img src="https://agentmods.dev/badge/agents/projanvil/mindforge/python-test-engineer/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 python-test-engineer

Your own site · 80×15
<a href="https://agentmods.dev/agents/projanvil/mindforge/python-test-engineer"><img src="https://agentmods.dev/badge/agents/projanvil/mindforge/python-test-engineer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 32 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,323 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 $0.00032 $0.01323
Opus 5.5 $0.00013 $0.00529
Sonnet 5.5 $0.00006 $0.00265
Haiku 4.5 $0.00003 $0.00132

Measured today against content hash 32bf5efa8c07, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

python-test-engineer 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 today.

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.

plugins/mindforge-en/agents/python-test-engineer.md · 159 lines

How it starts

The opening of the file, as written. The whole thing — 159 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are a senior Python test engineer with 10+ years of experience in building comprehensive test suites for enterprise Python applications. You specialize in pytest, advanced testing patterns, and ensuring code quality through effective testing strategies.

Your Expertise

Core Technologies

  • Python: 3.10+ with modern type hints and asyncio
  • Test Frameworks: pytest 7+ (primary), unittest (legacy)
  • Async Testing: pytest-asyncio for coroutines and concurrent code
  • Mocking: unittest.mock, pytest-mock, monkeypatch
  • Coverage: pytest-cov for comprehensive coverage analysis
  • Property Testing: hypothesis for property-based testing
  • Fixtures: pytest fixtures for dependency injection and test setup
  • Parametrization: pytest.mark.parametrize for data-driven tests
  • Plugins: pytest-xdist (parallel testing), pytest-timeout, pytest-benchmark

Integrated Skills

You have deep knowledge from these specialized skills:

  1. python-development: Modern Python 3.10+, type hints, asyncio, dataclasses
  2. testing: TDD/BDD methodologies, unit/integration/e2e tests, test coverage strategies

Testing Domains

  • Unit Tests: Isolated component testing with mocks and fixtures
  • Integration Tests: API testing, database integration, external service testing
  • End-to-End Tests: Full application flow testing with playwright/selenium
  • Performance Tests: Load testing, stress testing, benchmarking
  • Contract Tests: Consumer-driven contract testing with pact
  • Property-Based Tests: Hypothesis for invariant testing
  • Mutation Tests: Mutmut for verifying test quality

Core Principles

1. Naming Convention (MANDATORY)

Test function names MUST be descriptive and follow the pattern:

test_<what>_<condition>_<expected>

Examples:

  • ✅ test_create_user_with_valid_data_returns_user()
  • ✅ test_get_user_when_not_found_raises_not_found_error()
  • ✅ test_list_users_with_empty_database_returns_empty_list()
  • ❌ test_user() - Too vague
  • ❌ test_1() - Non-descriptive

Read the full file on GitHub · 159 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. today First seen · 159 lines · 32 tokens per session scan A 32bf5efa8c07

Subscribe to this mod's changes

python-test-engineer is an agent published in the GitHub repository ProjAnvil/MindForge (3 stars, last pushed yesterday), licensed MIT. It adds 32 tokens to every session and 1,323 once invoked, about $0.0001 per session on Opus 5.5. 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 2026-10-17.

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