← All skills

testing-with-sandbox

80 / 100 · Low risk

Fine to try. Some of what it can do is expected: a coding skill usually runs build and test commands.

By mailtrap/mailtrap-skills (GitHub) · coding · 11 stars · scanned at commit ba8ea7d

Use when capturing outbound email in development or staging without delivering to real recipients, inspecting HTML or headers, running spam or structure checks, or automating tests against a fake inbox. Use when testing outgoing mail from an app without committing to a production ESP yet. Use when using Mailtrap Email Sandbox, Sandbox API, or sandbox-mode sending.

Works with any agent that supports SKILL.md skills.

What this skill can do

Install

Paste this into your terminal. It downloads exactly the version we scanned, not whatever is newest.

if [ -e ~/.agents/skills/'testing-with-sandbox' ] || [ -L ~/.agents/skills/'testing-with-sandbox' ]; then echo 'A skill folder named testing-with-sandbox already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/mailtrap/mailtrap-skills' "$d" && git -C "$d" checkout --quiet 'ba8ea7d802bb66cc9b9529dcf441fb99bc1d8766' -- 'skills/testing-with-sandbox' && mkdir -p ~/.agents/skills && cp -R "$d"/'skills/testing-with-sandbox' ~/.agents/skills/'testing-with-sandbox' && rm -rf "$d"; fi

Codex reads ~/.agents/skills directly. For Claude Code, Cursor, Copilot, Gemini CLI, Antigravity or OpenCode, also link it. For Claude Code: ln -s ~/.agents/skills/'testing-with-sandbox' ~/.claude/skills/'testing-with-sandbox' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.

Badge for your README

The badge for mailtrap/mailtrap-skills shows the score of its lowest-scoring skill.

[![SkillTrust](https://zalavijaysinh.github.io/skilltrust/badges/mailtrap/mailtrap-skills.svg)](https://zalavijaysinh.github.io/skilltrust/repos/mailtrap/mailtrap-skills/)

Score history