Harper Offline Grammar Checker Automattic

Quality score: 70/100 · Category: Content · Sub-category: editorial

lang:rusttype:integration

Harper is an offline, privacy-first grammar checker written in Rust by Automattic. It runs locally with sub-10ms response times, supports LSP for editor integration, compiles to WebAssembly for browser use, and provides grammar, spelling, and style checking without sending text to external servers.

What this skill does

Harper Offline Grammar Checker Automattic is a production-ready Claude Code skill (quality score 70/100) in the editorial sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/harper-offline-grammar-checker-automattic/ and loads when your prompt matches the skill's trigger.

Who uses this skill

The Harper Offline Grammar Checker Automattic skill is built for content creators, marketers, copywriters, SEO professionals, and editorial teams. It is part of the open ClaudSkills registry, a community-curated catalog of 15,000+ capabilities you can install for Claude Code — the Claude CLI agent.

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/harper-offline-grammar-checker-automattic
curl -L https://claudskills.com/skills/harper-offline-grammar-checker-automattic/SKILL.md \
  -o ~/.claude/skills/harper-offline-grammar-checker-automattic/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/harper-offline-grammar-checker-automattic/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/harper-offline-grammar-checker-automattic/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\harper-offline-grammar-checker-automattic\SKILL.md on Windows. See the full install guide for step-by-step instructions.

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.