Agent skill

Tester

Test and validate AgentUse agents without real side effects.

Custom licenceAuto-check: notesAgent Workflows

Install Tester

skills CLI

$ npx skills add agentuse/agentuse --skill tester -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install agentuse/agentuse tester --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/agentuse/agentuse.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skill-data/tester .claude/skills/tester && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "tester" agent skill from https://github.com/agentuse/agentuse/tree/main/skill-data/tester into .claude/skills/tester/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tester", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/agentuse/agentuse/tree/main/skill-data/tester

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add agentuse/agentuse --skill tester -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install agentuse/agentuse tester --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/agentuse/agentuse.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skill-data/tester .agents/skills/tester && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "tester" agent skill from https://github.com/agentuse/agentuse/tree/main/skill-data/tester into .agents/skills/tester/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tester", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add agentuse/agentuse --skill tester -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install agentuse/agentuse tester --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/agentuse/agentuse.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skill-data/tester .cursor/skills/tester && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "tester" agent skill from https://github.com/agentuse/agentuse/tree/main/skill-data/tester into .cursor/skills/tester/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tester", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/agentuse/agentuse.git --path skill-data/tester

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add agentuse/agentuse --skill tester -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install agentuse/agentuse tester --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/agentuse/agentuse.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skill-data/tester .gemini/skills/tester && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "tester" agent skill from https://github.com/agentuse/agentuse/tree/main/skill-data/tester into .gemini/skills/tester/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tester", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install agentuse/agentuse tester

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add agentuse/agentuse --skill tester -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/agentuse/agentuse.git skills-src && mkdir -p .github/skills && cp -r skills-src/skill-data/tester .github/skills/tester && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "tester" agent skill from https://github.com/agentuse/agentuse/tree/main/skill-data/tester into .github/skills/tester/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tester", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add agentuse/agentuse --skill tester -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install agentuse/agentuse tester --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/agentuse/agentuse.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skill-data/tester .opencode/skills/tester && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "tester" agent skill from https://github.com/agentuse/agentuse/tree/main/skill-data/tester into .opencode/skills/tester/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tester", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: tester
GitHub stars: 205
Token cost: ~1.8k tokens
SKILL.md length: 774 words
Files: 1
Skills in repo: 7
Repo updated: Oct 7, 2026
First seen: Oct 7, 2026
Licence: Custom licence

At a glance

Test and validate AgentUse agents without real side effects.

Works in 5 steps: agentuse doctor . → agentuse test workflow --no-tty (with… → Inspect: agentuse sessions show --full… → …
Verifying a new
SKILL.md covers Always Start With Doctor, Choose Workflow or Result, Run the Test and Approval Gates Under Test, plus 3 more sections
Calls git

What it does

Tester is an agent skill from agentuse/agentuse. Test and validate AgentUse agents without real side effects. Use when verifying a new or changed .agentuse file, dry-running an agent, testing approval-gate flows unattended, mocking tool outputs, or iterating on an agent in a closed loop before letting it run for real.

Its SKILL.md is about 1.8k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Agent Workflows, covering Agent evaluation and testing. The repository describes itself as: 🤖 AI agents on autopilot. Any model. Runs local, cron, CI/CD, or Docker.

When your agent uses it

Verifying a new
Changed .agentuse file
Dry-running an agent
Testing approval-gate flows unattended

Example prompts

“/tester”

Workflow steps

5 steps, taken from the first numbered list in SKILL.md.

agentuse doctor .
agentuse test workflow --no-tty (with --mock-model unless
Inspect: agentuse sessions show --full (or the serve UI
Audit what would have executed: the session's effect-wal.jsonl. A
Fix the agent file, rerun. Re-test the reject/comment branches when the

What it can do on your machine

Read from SKILL.md and the folder at commit 8e524de. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
- git
From the folder's file list and the shell code blocks in SKILL.md.
Network
Links to these hosts (documentation or services it may open):
- docs.agentuse.io
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Tester loads about 1.8k tokens when it runs. Until then it costs about 69 tokens; SKILL.md has 774 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~69
When it runs · the whole SKILL.md, loaded when a task matches: ~1.8k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check: notes

The automated check noted patterns worth knowing about, such as sudo or a known installer.

NoteMentions a .env fileSKILL.md:55

once in `~/.agentuse/.env` to omit the flag.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 774 words (~1,822 tokens).

“Use test workflow to check steps or test result to compare a deliverable. Test sessions are stored and inspectable like any other, and is visibly marked: agentuse sessions shows a · mock status suffix, sessions show prints a Mock: line…”

— opening of SKILL.md by agentuse, Custom licence

name: tester

Read the full SKILL.md on GitHub

Files

Just SKILL.md in skill-data/tester of agentuse/agentuse.

Open the folder on GitHubat commit 8e524de

Compare with similar skills

Tester next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Tester compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Tester this skillagentuse/agentuse	205	—	~1.8k	Automated safety check: Notes	Custom licence	today
MCP Server Builderanthropics/skills	180k	62 repos	~2.3k	Automated safety check: Pass	Apache-2.0	2 days ago
Diagnosing Superpowers Sessionsobra/superpowers	296k	3 repos	~1.7k	Automated safety check: Pass	MIT	yesterday
Darwin Skill Optimizeralchaincyf/darwin-skill	6.2k	1 repos	~4.7k	Automated safety check: Pass	MIT	19 days ago
Skill Release Gaterohitg00/ai-engineering-from-scratch	65k	—	~1k	Automated safety check: Pass	MIT	yesterday
CodeGraph Agent Evalcolbymchenry/codegraph	73k	—	~950	Automated safety check: Pass	MIT	today

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Diagnosing Superpowers Sessions
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Darwin Skill Optimizer
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Scores SKILL.md files on a nine-dimension rubric, then improves them in a keep-or-revert loop with independent judge agents, test prompts, git history and human checkpoints.
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Skill Release Gate
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Questions about Tester

What does Tester do?

Test and validate AgentUse agents without real side effects. Tester is an agent skill from agentuse/agentuse. Test and validate AgentUse agents without real side effects.

When should I use Tester?

Tester fits situations like: verifying a new; changed .agentuse file; dry-running an agent; testing approval-gate flows unattended.

How do I install Tester in Claude Code?

Run `npx skills add agentuse/agentuse --skill tester -a claude-code`. Or copy the skill folder (skill-data/tester in agentuse/agentuse) into .claude/skills/tester in your project. Claude Code loads it when a task matches its description.

How do I install Tester in Codex?

Run `npx skills add agentuse/agentuse --skill tester -a codex`. Or copy the skill folder (skill-data/tester in agentuse/agentuse) into .agents/skills/tester in your project. Codex loads it when a task matches its description.

Can I use Tester in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add agentuse/agentuse --skill tester -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/tester, .gemini/skills/tester, .github/skills/tester and .opencode/skills/tester in your project.

What does Tester need to run?

Going by SKILL.md and its folder, Tester needs the command-line tools its instructions call (git).

Does Tester access the network?

SKILL.md names 1 domain. As links in the text: docs.agentuse.io. This is read from the text; nothing was executed.

Is Tester safe to install?

Our automated static check of SKILL.md found notes only (mentions a .env file), nothing it rates as a warning. It is not a guarantee. Review the folder before installing.

What licence does Tester use?

Tester has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.

How many tokens does Tester use?

About 1.8k tokens (SKILL.md is roughly 7.3k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Tester?

Skills that share tags, products or a category with Tester: MCP Server Builder (anthropics/skills, 180k stars), Diagnosing Superpowers Sessions (obra/superpowers, 296k stars), Darwin Skill Optimizer (alchaincyf/darwin-skill, 6.2k stars) and Skill Release Gate (rohitg00/ai-engineering-from-scratch, 65k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Tester?

agentuse (a GitHub organization) maintains it in agentuse/agentuse, which has 205 GitHub stars. The repository holds 7 skills in this directory. The repository was last updated on October 7, 2026.

Source: agentuse/agentuse on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Tester

Install Tester

Facts

At a glance

What it does

When your agent uses it

Example prompts

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Files

Compare with similar skills

Similar skills

MCP Server Builder

Diagnosing Superpowers Sessions

Darwin Skill Optimizer

Skill Release Gate

CodeGraph Agent Eval

Copilot Session Failure Analysis

More from agentuse/agentuse

Automate

Onboarding

Runner

Agentuse

Creator

Core

Questions about Tester

Install Tester

Facts

At a glance

What it does

When your agent uses it

Example prompts

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Files

Compare with similar skills

Similar skills

More from agentuse/agentuse

Related

Questions about Tester