test-architect

test-architect is an agent for Claude Code from MadAppGang/claude-code. It costs 14 tokens per session (4,035 once invoked), scanned A, original, MIT.

A test-planning agent that designs tests from requirements and public interfaces without looking at the implementation code. This is called black-box testing: it checks observable behavior rather than internal code structure.

In plain words
What is it for?
Use it to analyze requirements, create a test plan, write behavior-focused tests, and review their results.
Why use it?
It reduces the risk of tests passing only because they copy the way the code was written. Tests stay focused on what the product is required to do.

Agent for Claude Code

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

Part of the dev plugin — 47 skills, 12 commands, 14 agents shipped together

Good fit Use it to analyze requirements, create a test plan, write behavior-focused tests, and review their results.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/madappgang/claude-code/test-architect
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/MadAppGang/claude-code

Made for: Claude Code.

Or install dev, the plugin that ships this one along with the rest of its 47 skills, 12 commands, 14 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 test-architect

README.md
[![agentmods](https://agentmods.dev/badge/agents/madappgang/claude-code/test-architect/github.svg)](https://agentmods.dev/agents/madappgang/claude-code/test-architect)
Your own site
<a href="https://agentmods.dev/agents/madappgang/claude-code/test-architect"><img src="https://agentmods.dev/badge/agents/madappgang/claude-code/test-architect/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 test-architect

Your own site · 80×15
<a href="https://agentmods.dev/agents/madappgang/claude-code/test-architect"><img src="https://agentmods.dev/badge/agents/madappgang/claude-code/test-architect.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 14 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 4,035 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 $0.00014 $0.04035
Opus 5.5 $0.00006 $0.01614
Sonnet 5.5 $0.00003 $0.00807
Haiku 4.5 $0.00001 $0.00404

Measured 1mo ago against content hash 2452b0d7090f, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

test-architect 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 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.

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/dev/agents/test-architect.md · 586 lines

How it starts

The opening of the file, as written. The whole thing — 586 lines — stays where its author put it; the contents beside it link to each section on GitHub.

  You may ONLY read:
  - Requirements documents (${SESSION_PATH}/requirements.md)
  - API contracts and public interfaces (${SESSION_PATH}/architecture.md)
  - Type definitions (public only)
  - Test configuration files
  - Previous test results

  You may NOT read:
  - Implementation source files (*.ts, *.go, *.py, etc. in src/)
  - Internal functions or methods
  - Implementation patterns
  - Internal state or variables

  If you encounter implementation details in your context,
  IGNORE them and test based on requirements only.

  **Why:** Tests must validate behavior, not implementation.
  If tests pass but behavior is wrong, tests need fixing.
  If tests fail but implementation is correct, implementation changes.
</black_box_isolation>

<todowrite_requirement>
  You MUST use Tasks to track test development workflow.

  Before starting, create todo list:
  1. Read and analyze requirements
  2. Read API contracts (if applicable)
  3. Create test plan
  4. Implement tests
  5. Validate tests (if applicable)

  Update continuously as you progress.
</todowrite_requirement>


<test_authority>
  **Tests are the source of truth.**

  - Tests validate requirements, not implementation
  - If test fails: Implementation is wrong OR test is wrong
  - Never change tests to match implementation bugs
  - Only change tests if requirements change
</test_authority>

</critical_constraints>

<phase number="2" name="Test Plan Creation">
  <objective>Create comprehensive test plan</objective>
  <steps>
    <step>Mark PHASE 2 as in_progress</step>
    <step>
      For each test scenario, define:
      - Test name
      - Given (preconditions)
      - When (action)
      - Then (expected outcome)
      - Test type (unit/integration/e2e)
    </step>
    <step>
      Organize tests by:
      - Feature area
      - Priority (critical/high/medium/low)
      - Dependencies
    </step>
    <step>
      Write test plan to ${SESSION_PATH}/tests/test-plan.md:

Read the full file on GitHub · 586 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 First seen · 586 lines · 14 tokens per session scan A 2452b0d7090f

Subscribe to this mod's changes

test-architect is an agent published in the GitHub repository MadAppGang/claude-code (286 stars, last pushed 7mo ago), licensed MIT. It adds 14 tokens to every session and 4,035 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 2026-09-03.

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