12ui Design plugin

Public, installable distribution of the 12ui-design skill and its API contracts. The hosted service and documentation live at 12ui.com.

This repository is generated from the private 12ui implementation at the exact @12ui/design release revision. Version 0.2.35 matches the npm package.

Install as a Codex plugin

Add this repository as the 12ui-plugin marketplace, then install the 12ui-design plugin from it:

codex plugin marketplace add just-every/12ui-plugin
codex plugin add 12ui-design@12ui-plugin

The marketplace metadata is generated at /.agents/plugins/marketplace.json, and the plugin manifest is at /.codex-plugin/plugin.json.

Install across supported agents

The cross-agent installer supports Codex, Claude Code, Grok, Cursor, Antigravity, and GitHub Copilot:

npx -y @12ui/design skill install

That installer places only 12ui-design; recognized historical design bundles are retired, while locally modified copies are preserved.

Manual directory upload

Each GitHub release attaches 12ui-design-0.2.35.zip, a validated skills-only plugin archive with the manifest and skill at the archive root. It is suitable for the OpenAI Plugins Directory manual upload flow.

Skill

• 12ui-design - explore references, draft visual directions, expand an approved interface, convert it, and integrate the result.

Public API contracts

• convert-v1.openapi.yaml
• create-v1.openapi.yaml
• corpus-v1.openapi.yaml
• CONVERSION_PACKAGES.md
• EXPORT_FORMATS.md

The skill uses the public https://12ui.com API. Authentication is established by the installer and stored locally; credentials are never included in this repository.

The square icon in assets/ is copied byte-for-byte from the canonical 12ui website favicon sources for every generated release.

Provenance

Every release is generated from a fixed allowlist, validated for exact skill, icon, manifest, marketplace, and contract parity, packaged as a zip, tagged design-v0.2.35, and published only after the matching npm release completes. Do not edit generated files directly; changes must originate in the 12ui release source.