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mental-model

100 / 100 · Low risk

Fine to try.

By hashgraph-online/awesome-codex-plugins (GitHub) · design · 1,568 stars · scanned at commit 3e1e6b2

Use this skill whenever the design will be used by people who bring prior expectations — which is essentially every design. Trigger when designing onboarding, when picking metaphors (folders, channels, projects), when reviewing why users keep getting confused, when migrating from one product convention to another, or when the user mentions "users don't understand," "they keep doing X wrong," or "we're inventing something new." Mental Model is one of the foundational principles in 'Universal Pri…

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/'mental-model' ] || [ -L ~/.agents/skills/'mental-model' ]; then echo 'A skill folder named mental-model already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/hashgraph-online/awesome-codex-plugins' "$d" && git -C "$d" checkout --quiet '3e1e6b20ffc28f42923e391f29f075c424e19e64' -- 'plugins/HDeibler/universal-design-principles/plugins/cognition-and-learnability-principles/skills/mental-model' && mkdir -p ~/.agents/skills && cp -R "$d"/'plugins/HDeibler/universal-design-principles/plugins/cognition-and-learnability-principles/skills/mental-model' ~/.agents/skills/'mental-model' && 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/'mental-model' ~/.claude/skills/'mental-model' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.

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