← All skills

agent-builder

100 / 100 · Low risk

Fine to try.

By testdouble/han (GitHub) · coding · 341 stars · scanned at commit abba73a

Builds a new Claude Code agent (subagent) from scratch through a relentless, evidence-based interview that walks the agent's design tree decision-by-decision — entity fit, domain focus and vocabulary, role identity, anti-patterns, description, model tier, tools, and self-containment — then reviews the finished agent against the plugin-building guidance and applies every fix it finds. Use when creating, authoring, scaffolding, designing, or drafting a new agent or subagent. Does not build a skil…

Works with any agent that supports SKILL.md skills.

What this skill can do

We found nothing in the files we read that matches our rules. That does not prove the skill is safe: see the limits of static scanning.

Install

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

if [ -e ~/.agents/skills/'agent-builder' ] || [ -L ~/.agents/skills/'agent-builder' ]; then echo 'A skill folder named agent-builder already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/testdouble/han' "$d" && git -C "$d" checkout --quiet 'abba73a773528905a8f3d15956029394746e5c7f' -- 'han-plugin-builder/skills/agent-builder' && mkdir -p ~/.agents/skills && cp -R "$d"/'han-plugin-builder/skills/agent-builder' ~/.agents/skills/'agent-builder' && 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/'agent-builder' ~/.claude/skills/'agent-builder' (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 testdouble/han shows the score of its lowest-scoring skill.

[![SkillTrust](https://zalavijaysinh.github.io/skilltrust/badges/testdouble/han.svg)](https://zalavijaysinh.github.io/skilltrust/repos/testdouble/han/)

Score history