skill CX Codex

code-testing-agent — Claude Code skill

Q: How do I install code-testing-agent in Claude Code?

Run `npx skills add dotnet/skills --skill code-testing-agent -a claude-code`, then run the same command again: `npx skills add dotnet/skills --skill code-testing-agent -a claude-code`. The skill file is at `~/.claude/skills/code-testing-agent/SKILL.md`.

A compatibility alias for code-testing that forwards explicit legacy calls to the current code-testing workflow.

Install into Claude Code · Skills CLI (Vercel) All methods and platforms ↓

npx skills add dotnet/skills --skill code-testing-agent -a claude-code

Open on GitHub

What code-testing-agent does

code-testing-agent keeps older explicit calls working when they still use the former skill name. It invokes code-testing with the original user request, then follows that skill's workflow without adding another interpretation layer.

The alias does not activate itself for user requests and is not a custom agent. In dotnet/skills, it is distributed under the MIT license; the public custom agent is test-engineer, while the model-facing skill is code-testing. That makes the alias useful for older instructions, but current setups should check whether they still need the legacy name.

What it helps with

keep older skill calls working after a rename
forward a request to code-testing unchanged
separate a skill alias from a custom agent
run legacy testing instructions in Claude Code

Example prompts for the agent

Explicitly invoke code-testing-agent for this request and pass it to code-testing.
Handle this older instruction through code-testing-agent without adding another interpretation layer.
Check that code-testing-agent forwards the request to code-testing.

How to install code-testing-agent

1Skills CLI (Vercel)

npx skills add dotnet/skills --skill code-testing-agent -a claude-code

2Manually: put the files in place

~/.claude/skills/code-testing-agent/SKILL.md

Copy the whole skill folder; for one project use .claude/skills/code-testing-agent/

1Skills CLI (Vercel)

npx skills add dotnet/skills --skill code-testing-agent -a codex

2Manually: put the files in place

.agents/skills/code-testing-agent/SKILL.md

For all projects use ~/.agents/skills/

1Skills CLI (Vercel)

npx skills add dotnet/skills --skill code-testing-agent -a cursor

2Manually: put the files in place

.cursor/skills/code-testing-agent/SKILL.md

Cursor also reads .agents/skills/ and .claude/skills/

1GitHub CLI

gh skill install dotnet/skills code-testing-agent

2Manually: put the files in place

.github/skills/code-testing-agent/SKILL.md

1Skills CLI (Vercel)

npx skills add dotnet/skills --skill code-testing-agent -a gemini-cli

2Platform CLI

gemini skills install https://github.com/dotnet/skills --path plugins/dotnet-test/skills/code-testing-agent

Manually: put the files in place

.devin/skills/code-testing-agent/SKILL.md

The legacy .windsurf/skills/ path still works

Skills CLI (Vercel)

npx skills add dotnet/skills --skill code-testing-agent -a opencode

Step by step, with commands for each platform: How to install skills in Claude Code: five ways

Questions about code-testing-agent

How do I install code-testing-agent in Claude Code?

Run npx skills add dotnet/skills --skill code-testing-agent -a claude-code, then run the same command again: npx skills add dotnet/skills --skill code-testing-agent -a claude-code. The skill file is at ~/.claude/skills/code-testing-agent/SKILL.md.

What does code-testing-agent do?

It preserves compatibility with older explicit calls and forwards the original request to code-testing. It does not activate itself for user requests.

Is code-testing-agent a custom agent?

No. It is a compatibility alias for a skill. The public custom agent is test-engineer, while the model-facing testing skill is code-testing.

Source text

SKILL.md · MIT

---
name: code-testing-agent
description: >-
  Legacy compatibility alias for the code-testing skill. Do not self-activate
  for user requests and do not treat this name as a custom agent. When invoked
  explicitly by older instructions, load code-testing and follow it instead.
user-invocable: false
disable-model-invocation: true
license: MIT
---

# Legacy Code Testing Alias

This skill preserves explicit calls that still use the former
`code-testing-agent` name. The public custom agent is `test-engineer`; the
model-facing implicit skill is `code-testing`.

1. Invoke the `code-testing` skill with the original user request.
2. Follow that skill's workflow without adding another interpretation layer.

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