A command for planning which parts of a codebase need unit, integration, and end-to-end tests. It uses a test-architect subagent to examine interfaces, business rules, dependencies, and failure cases.

Use it when adding a feature or reviewing existing code and you need a test coverage plan, including candidates for unit tests, integration tests, and full user-journey tests.

It helps avoid testing only the obvious paths or using too many slow end-to-end tests. The result is a more deliberate balance of test types.

test-design — Command for Claude Code by CloudAI-X/opencode-workflow

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/CloudAI-X/opencode-workflow

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.

README.md

[![agentmods](https://agentmods.dev/badge/commands/cloudai-x/opencode-workflow/test-design/github.svg)](https://agentmods.dev/commands/cloudai-x/opencode-workflow/test-design)

Your own site

<a href="https://agentmods.dev/commands/cloudai-x/opencode-workflow/test-design"><img src="https://agentmods.dev/badge/commands/cloudai-x/opencode-workflow/test-design/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.

Your own site · 80×15

<a href="https://agentmods.dev/commands/cloudai-x/opencode-workflow/test-design"><img src="https://agentmods.dev/badge/commands/cloudai-x/opencode-workflow/test-design.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 9 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 987 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.

Model	Per session	Once invoked
Fable 5.1	$0.00009	$0.00987
Opus 5.5	$0.00004	$0.00395
Sonnet 5.5	$0.00002	$0.00197
Haiku 4.5	$0.00001	$0.00099

Measured 1mo ago against content hash e2525a63c182, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

test-design 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.

commands/test-design.md · 187 lines

How it starts

The opening of the file, as written. The whole thing — 187 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Test Design Command

Plan comprehensive test coverage strategy for new or existing code using the test-architect subagent.

Phase 1: Understand the Target

Analyze what needs testing:

If $ARGUMENTS provided, focus on specified files/features
Read the target code and understand:
- Public interfaces and contracts
- Business logic and edge cases
- Dependencies and integrations
- Error handling paths

Phase 2: Test Pyramid Analysis

Determine appropriate test distribution:

         /\
        /  \  E2E Tests (Few)
       /----\  - Critical user journeys
      /      \ - Cross-system validation
     /--------\
    /          \ Integration Tests (Some)
   /            \ - API contracts
  /              \ - Database interactions
 /----------------\ - External service mocks
/                  \
/    Unit Tests     \ (Many)
/    (Foundation)    \
/----------------------\

Unit Test Candidates

Pure functions
Business logic
Data transformations
Validation rules
Edge cases and boundaries

Integration Test Candidates

API endpoints
Database operations
Message queues
External service calls
Authentication flows

E2E Test Candidates

Critical user journeys
Checkout/payment flows
Authentication sequences
Multi-step workflows

Phase 3: Test Case Generation

For each identified test target, design:

Test Case Template

Feature: [Feature Name]
Scenario: [Scenario Description]
  Given: [Initial State]
  When: [Action Taken]
  Then: [Expected Outcome]

Edge Cases:
  - [Edge case 1]
  - [Edge case 2]

Error Cases:
  - [Error scenario 1]
  - [Error scenario 2]

Coverage Strategy

Happy path (normal flow)
Boundary conditions
Error handling
Null/undefined inputs
Concurrent access (if applicable)
Performance constraints

Phase 4: Framework Detection & Setup

Detect existing test infrastructure:

Jest/Vitest for JavaScript/TypeScript
pytest for Python
go test for Go
JUnit for Java

Read the full file on GitHub · 187 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.

1mo ago First seen · 187 lines · 9 tokens per session scan A e2525a63c182

Subscribe to this mod's changes

test-design is a command published in the GitHub repository CloudAI-X/opencode-workflow (276 stars, last pushed 9mo ago), licensed MIT. It adds 9 tokens to every session and 987 once invoked, about $0.0000 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 2026-08-30.

E2E testing Planning Testing Unit testing

test-design