designing-tests

A test-design guide focused on tests that catch regressions, verify connections between parts of a system, and check whether the architecture behaves as intended. It also helps prepare evidence for handing work to another developer.

In plain words
What is it for?
Planning regression tests, testing integration boundaries, checking architectural rules, and documenting test evidence.
Why use it?
It gives developers a structured way to decide what to test and how to show that important behavior is protected.

Plugin for Claude Code

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.

Claude Code
/plugin marketplace add jacexh/skill-workshop
agentmods
npx agentmods add plugins/jacexh/skill-workshop/designing-tests
Clone the repo
git clone --depth 1 https://github.com/jacexh/skill-workshop

Made for: Claude Code.

Per session not measured What this adds to a session before it is invoked.
When invoked not measured Not applicable: nothing here is loaded into a session.
Security scan A 0 findings. Scan, not verified.
Origin unknown No closer match found in the catalogue.
Security

Grade A, and why

designing-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 yesterday.

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/designing-tests/.claude-plugin/plugin.json · 16 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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. yesterday First seen · 16 lines scan A 2c9546b52c2e

Subscribe to this mod's changes

designing-tests is a plugin published in the GitHub repository jacexh/skill-workshop (2 stars, last pushed 10d ago), with no licence file. Its token cost is not measured: this kind of file is read by the harness, not the model. 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.