Pretext Skill

Pretext Skill

[](https://yaniv-golan.github.io/pretext-skill/static/install-claude-desktop.html)

[](https://opensource.org/licenses/MIT) [](https://agentskills.io) [](https://docs.anthropic.com/en/docs/agents-and-tools/claude-code/plugins) [](https://cursor.com/docs/plugins) [](https://github.com/yaniv-golan/skill-creator-plus)

An AI agent skill that helps developers use **[@chenglou/pretext](https://github.com/chenglou/pretext)** — a small, tree-shakable TypeScript library that computes exact text metrics without DOM reflows.

Uses the open [Agent Skills](https://agentskills.io) standard. Works with Claude Desktop, Claude Cowork, Claude Code, Codex CLI, Cursor, Windsurf, Manus, ChatGPT, and any other compatible tool.

About @chenglou/pretext

[Pretext](https://github.com/chenglou/pretext) is a small, tree-shakable TypeScript library by Cheng Lou. It uses `CanvasRenderingContext2D.measureText` internally, segments text, measures once, caches, then does arithmetic for all subsequent layouts. Each `layout()` call is ~0.0002ms — safe to call every animation frame.

**Key capabilities:**

• Know text dimensions before rendering (virtual scrolling, masonry layouts)
• Auto-fit text to a container (find largest font that fits N lines)
• Flow text around obstacles (magazine-style layouts)
• Render rich inline text — mentions, chips, cod