← All skills

constraint

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 must structurally prevent invalid actions — input validation, disabled states, required fields, type-restricted inputs, mode locks, role-based gates, hardware lockouts. Trigger when designing forms, picking input types, designing destructive flows, gating multi-step procedures, or thinking about how to prevent a class of errors from being possible at all. Constraint is one of the foundational principles in 'Universal Principles of Design' (Lidwell, Holden, But…

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/'constraint' ] || [ -L ~/.agents/skills/'constraint' ]; then echo 'A skill folder named constraint 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 "$d" checkout --quiet '3e1e6b20ffc28f42923e391f29f075c424e19e64' -- 'plugins/HDeibler/universal-design-principles/plugins/interaction-and-control-principles/skills/constraint' && mkdir -p ~/.agents/skills && cp -R "$d"/'plugins/HDeibler/universal-design-principles/plugins/interaction-and-control-principles/skills/constraint' ~/.agents/skills/'constraint' && 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/'constraint' ~/.claude/skills/'constraint' (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 hashgraph-online/awesome-codex-plugins shows the score of its lowest-scoring skill.

[![SkillTrust](https://zalavijaysinh.github.io/skilltrust/badges/hashgraph-online/awesome-codex-plugins.svg)](https://zalavijaysinh.github.io/skilltrust/repos/hashgraph-online/awesome-codex-plugins/)

Score history